Technical Feasibility of
`Technical Feasibility of
`Sending Common Mode
`Sending Common Mode
`Power on the Signal Pairs
`Power on the Signal Pairs
`
`, Cisco SystemsRoger Roger KaramKaram, Cisco Systems
`
`
`
`
`rkaramrkaram@@ciscocisco.com.com
`Karl Nakamura, Cisco Systems
`Karl Nakamura, Cisco Systems
`
`
`karlnkarln@@ciscocisco.com.com
`
`Page 1 of 93
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`1
`
`CHRIMAR 2046
`
`
`Technical Feasibility of
`Sending Common Mode
`Sending Common Mode
`Power on the Signal Pairs
`Power on the Signal Pairs
`
`, Cisco SystemsRoger Roger KaramKaram, Cisco Systems
`
`
`
`
`rkaramrkaram@@ciscocisco.com.com
`Karl Nakamura, Cisco Systems
`Karl Nakamura, Cisco Systems
`
`
`karlnkarln@@ciscocisco.com.com
`
`Page 1 of 93
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`1
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`CHRIMAR 2046
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`
`
`Presentation Overview
`Presentation Overview
`
`Two parts
`Part 1 - High Level Overview
`No Questions please
`Part 2 - Technical Detail
`250 hrs of investigation
`90 Slides
`Questions OK
`
`Page 2 of 93
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`
`
`Criteria for Technical feasibility
`Criteria for Technical feasibility
`
`1. Signal Integrity, 10 Mbps
`2. Signal Integrity, 100 Mbps
`3. Effects on Magnetics
`4. Operational characteristics
`
`•
`
`Isolation is important but common
`to all solutions – will not be
`addressed here
`
`Page 3 of 93
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`
`
`detailsCriteria 1 Criteria 1 -- details
`
`
`• Signal Integrity, 100 Mbit/s
`Differential Signal 0-Pk
`Amplitude Symmetry
`Rise/Fall Time
`Duty Cycle Distortion
`Transmit Jitter
`Overshoot
`Differential Input Impedance
`Common Mode Rejection
`
`Page 4 of 93
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`
`
`
`
`detailsCriteria 2 Criteria 2 -- details
`
`• Signal Integrity, 10 Mbit/s
`
`Peak Differential Output Voltage on TD(Transmit Data)
`Harmonic Content, All Ones
`Output Waveform vs Template
`Start of TP_IDL(End of 10Base-T Packet) waveform vs Template
`Link Test Pulse vs Template
`TD circuit Differential Output Impedance
`Transmitter added Jitter
`TD common mode output voltage
`TD common mode rejection
`RD(Received Data) Signal Acceptance
`Receiver Jitter Acceptance
`Receiver Added Jitter
`RD Differential Input Impedance
`RD Common Mode Rejection
`
`Page 5 of 93
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`
`
`
`
`detailsCriteria 3 and 4 Criteria 3 and 4 –– details
`
`• Effects on Magnetics
`Return Loss
`Common Mode to Differential Mode
`Conversion
`• Operational Characteristics
`BER Effects
`Switching Noise and BER
`
`Page 6 of 93
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`Test methodology
`Test methodology
`
`• All tests conducted with and
`without power
`• Test results compared to
`determine effect
`
`Page 7 of 93
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`
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`Technical Feasibility
`Technical Feasibility
`Conclusion
`Conclusion
`
`• Power over Signal Pairs is
`Technically Feasible
`• Power noise must be controlled for
`EMI regardless of which pair set is
`used for power. Once controlled:
`• No measurable difference between
`the Tx or Rx Characteristics with and
`without power
`• No link degradation due to power
`
`Page 8 of 93
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`8
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`
`
`Technical Detail
`Technical Detail
`
`Page 9 of 93
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`www.cisco.com
`
`
`
`99
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`CHRIMAR 2046
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`
`
`Power over Signal Pairs
`Power over Signal Pairs
`Schematic
`Schematic
`
`Page 10 of 93
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`
`
`Power of Signal Pairs
`Power of Signal Pairs
`Assumptions
`Assumptions
`
`• SELV DC Power (40-54 Volts DC)
`• ~15 Watts (300mA) over 100 Meters,
`Cat-5 Cable
`• Switching Power Supplies at the
`Source and DTE
`
`Page 11 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`
`100 100 MbitMbit/s/s
`
`Page 12 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Tx Eye and Jitter, I = 0
`
`Page 13 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Page 14 of 93
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`Tx Eye and Jitter, I = 300 mA
`
`14
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Page 15 of 93
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`Tx Overshoot, I = 0, 300 mA
`
`15
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Negate and
`Compare:
`
`No Change
`at all
`
`Tx (DCD)Duty Cycle Distortion I = 0, I = 300 mA
`
`Page 16 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Tx Waveform at 124 Meters I = 0, I = 300 mA
`
`Page 17 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`CH1
`
`S11 &M LOG
`
`10 dB/
`
`REF -30 dB
`
`5 : -16
`
`. 582
`
`dB
`
`100 . 000
`
`000 MHz
`
` 3 Jul 2000 16:42:12
`
`
`
`CH1 Markers
`
`. 092
`1 : -27
`2 . 00000
`
`dB
`MHz
`
`. 855
`2 : -23
`30 . 0000
`
`dB
`MHz
`
`5
`
`. 242
`3 : -30
`60 . 0000
`
`dB
`MHz
`
`4 : -26
`
`. 541
`
`dB
`
`80 . 0000
`
`MHz
`
`2
`
`4
`
`3
`
`
`
`
`
`1
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Tx Return Loss I = 0, I = 300 mA
`
`Page 18 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`CH1 Markers
`
`. 157
`1 : -29
`2 . 00000
`
`dB
`MHz
`
`. 032
`2 : -29
`30 . 0000
`
`dB
`MHz
`
`. 614
`3 : -24
`60 . 0000
`
`dB
`MHz
`
`4 : -22
`
`. 044
`
`dB
`
`80 . 0000
`
`MHz
`
`5
`
`CH1
`
`S11 &M LOG
`
`10 dB/
`
`REF -30 dB
`
`5 : -19
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`. 343
`
`dB
`
`100 . 000
`
`000 MHz
`
` 3 Jul 2000 16:49:40
`
`
`
`MARKER 5
` 100 MHz
`
`
`
`
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`
`
`
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`Cor
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`
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`
`
`1
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`2
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`3
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`4
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`
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`START
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`. 500
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`000 MHz
`
`STOP
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`100 . 000
`
`000 MHz
`
`Rx Return Loss I = 0, I = 300 mA
`
`Page 19 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Rx Jitter and Common Mode Tolerance, I = 0, 1 Error/10M
`Packets @ 30 Meters
`
`Page 20 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`100100 MbitMbit/s/s
`
`Rx Jitter and Common Mode Tolerance, I = 300 mA,
`1 Error/30M Packets @ 30 Meters
`
`21
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`CHRIMAR 2046
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`Page 21 of 93
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`
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`
`
`100100 MbitMbit/s, Summary/s, Summary
`
`Characteristic
`Differential Signal 0-PK
`
`Amplitude Symmetry
`
`Rise/Fall Time
`
`With Power
`No Power
`934 mV
`934 mV
`1%
`1%
`4.98/4.86
`4.98/4.86
`.04 nSec
`.04 nSec
`800 pSec
`800 pSec
`<3%
`<3%
`-27, -24, -30, -27 dB -27, -24, -30, -27 dB
`Differential Input Impedance
`Tx @ 2, 30, 60, 80 Mhz
`-29, -29, -25, -22 dB -29, -29, -25, -22 dB
`Differential Input Impedance
`Rx @ 2, 30, 60, 80 Mhz
`Received Jitter Tolerance See Slides
`See Slides
`See Slides
`See Slides
`Common Mode Rejection
`
`Duty Cycle Distortion
`
`Transmit Jitter (measured
`triggering on the data)
`Overshoot
`
`Page 22 of 93
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`22
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`
`
`Signal Quality Measurements
`Signal Quality Measurements
`1010 MbitMbit/s/s
`
`Test Schematic for 10MBit/s testing
`
`Page 23 of 93
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`23
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`1010 MbitMbit/s/s
`
`Test Schematic for 10MBit/s testing
`
`Page 24 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`1010 MbitMbit/s/s
`
`Page 25 of 93
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`Test Schematic for 10MBit/s testing
`
`25
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`CHRIMAR 2046
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s EOP(End of Packet or Start of
`TP_Idle) I = 0, I = 300 mA
`
`Page 26 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s Signal I = 0, I = 300 mA
`
`Page 27 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`CH1
`
`S11 &M LOG
`
`10 dB/
`
`REF -30 dB
`
`4 : -20 . 649
`
`dB
`
`10 . 000
`
`000 MHz
`
` 3 Jul 2000 16:45:59
`
`
`
`MARKER 4
` 10 MHz
`
`4
`
`3
`
`
`
`2
`
`1
`
`CH1 Markers
`
`1 : -31 . 717
`500 . 000
`
`dB
`kHz
`
`2 : -25 . 888
`5. 00000
`
`dB
`MHz
`
`3 : -17 . 472
`15 . 0000
`
`dB
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
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`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Transmit Return Loss
`I = 0, I = 300 mA
`
`Page 28 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`CH1
`
`S11 &M LOG
`
`10 dB/
`
`REF -30 dB
`
`4 : -30 . 859
`
`dB
`
`10 . 000
`
`000 MHz
`
` 3 Jul 2000 16:48:58
`
`
`
`MARKER 4
` 10 MHz
`
`
`
`1
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`4
`
`2
`
`3
`
`CH1 Markers
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`. 139
`1 : -26
`500 . 000
`
`dB
`kHz
`
`. 524
`2 : -30
`5. 00000
`
`dB
`MHz
`
`. 757
`3 : -30
`15 . 0000
`
`dB
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Receive Return Loss
`I = 0, I = 300 mA
`
`Page 29 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s Harmonics I = 0, I = 300 mA
`
`Page 30 of 93
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s Harmonics, Clearer Scale I = 0, I = 300 mA
`
`Page 31 of 93
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`31
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s Link Pulses I = 0, I = 300 mA
`
`Page 32 of 93
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`32
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s Common Mode Voltage I = 0, I = 300 mA
`
`Page 33 of 93
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`33
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s Common Mode Rejection I = 0, I = 300 mA
`
`Page 34 of 93
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`34
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10.1MHz Sine Wave Injected, No Excess Jitter Present
`I = 300 mA
`
`Page 35 of 93
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`35
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10.1MHz Sine Wave Injected, No Excess Jitter Present
`I = 0
`
`Page 36 of 93
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`36
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`Signal Quality Measurements
`Signal Quality Measurements
`1010 MbitMbit/s/s
`
`Test 14.3.1.2.4
`
`CISCO SYSTEMS
`
`Common Mode to Differential Conversion
`
`Freq
`MHZ
`
`calculate
`TX
`BALANCE "29-17*LOG10(FREQ/10)
`
`1.00E+00
`
`2.00E+00
`
`5.00E+00
`
`1.00E+01
`
`1.50E+01
`
`2.00E+01
`
`1-
`
`2-
`
`Meas
`VECM
`11.1
`
`11.1
`
`11
`
`10.9
`
`10.6
`
`10.6
`
`I=0
`Meas
`VDIFF
`0.049
`
`0.055
`
`0.1
`
`0.153
`
`0.202
`
`0.246
`
`no power Calculate
`20*LOG10(VECM/VDIFF)
`I=0
`Calculate
`47.10254
`
`Meas
`I=300ma
`VDIFF
`0.04
`
`20*LOG10(VECM/VDIFF)
`Calculate-I=300ma
`
`Calculate
`48.86526
`
`46.09921
`
`40.82785
`
`37.0547
`
`34.39909
`
`32.68742
`
`0.047
`
`47.4645
`
`0.06
`
`0.1
`
`0.16
`
`0.17
`
`45.26483
`
`40.74853
`
`36.42372
`
`35.89714
`
`SPECIFICATION
`4.60E+01
`
`4.09E+01
`
`3.41E+01
`
`2.90E+01
`
`2.60E+01
`
`2.39E+01
`
`WE SEE THE SAME RESULTS WITH
`
`CURRENT- Actually slightly better even with current source inTURNED ON AT 300MA
`MY GENERATOR CAN'T DO MORE THAN 11.1V
`
`Freq is in Mhz, so I used 1/10 to calculate the LOG of the 1MHZ data point
`slight change in balance measurement for the better, you would have hoped that
`my current source would cause an imbalance if anything…. Looks good.
`
`Done on #19 - bel
`
`Page 37 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`Receive Jitter and Common Mode Tolerance, I = 300 mA
`at 128 M, Cat-3, Error Free, 5M Packets
`
`Page 38 of 93
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`Receive Jitter and Common Mode Tolerance, I = 300 mA
`at 128 M, Cat-3, Error Free, 5M Packets, Single Ended
`
`Page 39 of 93
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`39
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`10 10 MbitMbit/s/s
`
`10 Mbit/s 500 KHz, 25V Square Wave Common Mode
`Rejection of the RX I = 300 mA
`
`Page 40 of 93
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`
`10 10 MbitMbit/s, Summary/s, Summary
`
`Characteristic
`Peak Differential Output Voltage on
`TD
`TD circuit Differential Output Tx
`Impedance @ 5, 10Mhz
`TD circuit Differential Output Rx
`Impedance @ 5, 10Mhz
`TD common mode output voltage
`
`TD common mode rejection(See
`Slides 24-26)
`RD Signal Acceptance
`
`Receiver Jitter Acceptance (See
`Slides)
`
`Receiver Added Jitter
`Common Mode to Differential Mode
`Conversion
`RD Common Mode Rejection (See
`Slide 27)
`
`No Power
`4.64/4.64
`-26, -18 dB
`-31, -31 dB
`< 40 mV
`Pass
`690 mV
`>13 nSec
`< 1 nSec
`Pass
`Pass
`
`With Power
`4.64/4.64
`-26, -18 dB
`-31, -31 dB
`< 40 mV
`Pass
`730 mV
`> 13 nSec
`< 1 nSec
`Pass
`Pass
`
`Page 41 of 93
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`41
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`Common to Differential
`At far end
`
`Page 42 of 93
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`42
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1 Markers
`
`. 242
`1 : -78
`549 . 750
`
`dB
`kHz
`
`. 987
`2 : -60
`8 . 90515
`
`dB
`MHz
`
`. 347
`3 : -40
`25 . 9828
`
`dB
`MHz
`
`4 : -29
`
`. 468
`
`dB
`
`61 . 9256
`
`MHz
`
`5
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -24
`
`. 553
`
`dB
`
`100 . 000
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`000 MHz
`
`28 Jun 2000 10:46:48
`
`
`
`MARKER 5
` 100 MHz
`
`
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`3
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`4
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`1
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`START
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`. 500
`
`000 MHz
`
`STOP
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`100 . 000
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`000 MHz
`
`Common Mode to Differential Conversion, Drove Supply Side, Measure at
`PHY on the RL Side
`
`Page 43 of 93
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`43
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`
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`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1 Markers
`
`1 : -78
`549
`
`. 267
`. 750
`
`dB
`kHz
`
`. 777
`2 : -61
`8. 90515
`
`dB
`MHz
`
`. 330
`3 : -40
`25 . 9828
`
`dB
`MHz
`
`4 : -29
`
`. 462
`
`dB
`
`61 . 9256
`
`MHz
`
`5
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -24
`
`. 513
`
`dB
`
`100
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`. 000
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`MHz
`
`28 Jun 2000 10:47:12
`
`
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`MARKER 5
` 100 MHz
`
`
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`3
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`START
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`. 500
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`000
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`MHz
`
`STOP
`
`100
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`. 000
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`000
`
`MHz
`
`Common Mode to Differential Conversion, Drove Supply Side, Measure at
`PHY on the RL Side, I = 0, I = 300 mA
`
`Page 44 of 93
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`44
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`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -27
`
`. 328
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 10:49:08
`
`
`
`CH1 Markers
`
`. 131
`1 : -81
`549 . 750
`
`dB
`kHz
`
`. 648
`2 : -53
`8 . 90515
`
`dB
`MHz
`
`. 341
`3 : -45
`25 . 9828
`
`dB
`MHz
`
`4 : -34
`
`. 889
`
`dB
`
`61 . 9256
`
`MHz
`
`5
`
`MARKER 5
` 100 MHz
`
`
`
`2
`
`3
`
`4
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`1
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Compare Tx to Rx, I = 0
`
`Page 45 of 93
`
`45
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1 Markers
`
`1 : -71
`549
`
`. 496
`. 750
`
`dB
`kHz
`
`. 013
`2 : -54
`8. 90515
`
`dB
`MHz
`
`. 166
`3 : -45
`25 . 9828
`
`dB
`MHz
`
`4 : -34
`
`. 726
`
`dB
`
`61 . 9256
`
`MHz
`
`5
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -27
`
`. 290
`
`dB
`
`100 . 000
`
`000
`
`MHz
`
`28 Jun 2000 10:49:33
`
`
`
`3
`
`4
`
`MARKER 5
` 100 MHz
`
`
`
`2
`
`1
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000
`
`MHz
`
`STOP
`
`100 . 000
`
`000
`
`MHz
`
`Tx I = 0, I = 300 mA
`
`Page 46 of 93
`
`46
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`Common to Differential
`Noise at near end
`
`Page 47 of 93
`
`47
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -36 . 926
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 10:53:34
`
`
`
`MARKER 5
` 100 MHz
`
`
`
`2
`
`1
`
`3
`
`4
`
`CH1 Markers
`
`1 : -78 . 160
`549 . 750
`
`dB
`kHz
`
`2 : -59 . 284
`8 . 90515
`
`dB
`MHz
`
`3 : -44 . 694
`25 . 9828
`
`dB
`MHz
`
`4 : -34 . 323
`
`dB
`
`61 . 9256
`
`MHz
`
`5
`
`Blue is PHY Side
`
`Red is Wire Side
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Rx Common Mode to Differential, Drove the Rx side of the RL and
`measured on the wire side I = 0
`
`Page 48 of 93
`
`48
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -36 . 650
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 10:54:06
`
`
`
`MARKER 5
` 100 MHz
`
`
`
`1
`
`2
`
`3
`
`4
`
`CH1 Markers
`
`. 824
`1 : -71
`549 . 750
`
`dB
`kHz
`
`. 938
`2 : -59
`8. 90515
`
`dB
`MHz
`
`. 951
`3 : -44
`25 . 9828
`
`dB
`MHz
`
`4 : -34
`
`. 253
`
`dB
`
`61 . 9256
`
`MHz
`
`5
`
`Red is Wire Side,
`I = 300 mA
`
`Blue is Wire Side,
`I = 0 from
`previous slide
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Rx Common Mode to Differential, Drove the Rx side of the RL and
`measured on the wire side I = 0, I = 300 mA
`
`Page 49 of 93
`
`49
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -32
`
`. 246
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 10:55:27
`
`
`
`CH1 Markers
`
`. 823
`1 : -73
`549 . 750
`
`dB
`kHz
`
`. 869
`2 : -52
`8 . 90515
`
`dB
`MHz
`
`5
`
`. 701
`3 : -43
`25 . 9828
`
`dB
`MHz
`
`4 : -39
`
`. 615
`
`dB
`
`61 . 9256
`
`MHz
`
`3
`
`4
`
`MARKER 5
` 100 MHz
`
`
`
`2
`
`1
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Compare Tx to Rx, Wire Side, I = 0 mA
`
`Page 50 of 93
`
`50
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -31
`
`. 958
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 10:55:45
`
`
`
`CH1 Markers
`
`. 752
`1 : -69
`549 . 750
`
`dB
`kHz
`
`. 480
`2 : -52
`8 . 90515
`
`dB
`MHz
`
`5
`
`. 009
`3 : -44
`25 . 9828
`
`dB
`MHz
`
`4 : -39
`
`. 607
`
`dB
`
`61 . 9256
`
`MHz
`
`3
`
`4
`
`MARKER 5
` 100 MHz
`
`
`
`2
`
`1
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Tx Common Mode to Differential, Wire Side I = 0, I = 300 mA
`
`Page 51 of 93
`
`51
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -21 . 415
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 11:17:36
`
`
`
`4
`
`5
`
`CH1 Markers
`
`. 617
`1 : -67
`549 . 750
`
`dB
`kHz
`
`. 840
`2 : -67
`8. 90515
`
`dB
`MHz
`
`. 329
`3 : -37
`25 . 9828
`
`dB
`MHz
`
`4 : -26
`
`. 707
`
`dB
`
`61 . 9256
`
`MHz
`
`MARKER 5
` 100 MHz
`
`
`
`3
`
`1
`
`2
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Tx Common Mode to Differential Conversion, Wire Side,
`R = 0, R = 2.5 Ohms in series with Rx
`
`Page 52 of 93
`
`52
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S12 &M LOG
`
`20 dB/
`
`REF -60 dB
`
`5 : -21 . 806
`
`dB
`
`100 . 000
`
`000 MHz
`
`28 Jun 2000 11:19:18
`
`
`
`MARKER 5
` 100 MHz
`
`
`
`3
`
`4
`
`2
`
`1
`
`5
`
`CH1 Markers
`
`. 567
`1 : -80
`549 . 750
`
`dB
`kHz
`
`. 293
`2 : -75
`8. 90515
`
`dB
`MHz
`
`. 399
`3 : -38
`25 . 9828
`
`dB
`MHz
`
`4 : -27
`
`. 311
`
`dB
`
`61 . 9256
`
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Tx Common Mode to Differential Conversion, Wire Side,
`R = 2.5 Ohms in series with Rx, I = 0, I = 300 mA
`
`Page 53 of 93
`
`53
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`Return Loss
`
`Page 54 of 93
`
`54
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -27
`
`. 285
`
`dB
`
`5. 942
`
`650
`
`MHz
`
`28 Jun 2000 13:18:01
`
`MARKER 1
` 5.94265 MHz
`
`Cor
`
`CH1 Markers
`
`. 228
`2 : -30
`2 . 00000
`
`dB
`MHz
`
`. 544
`3 : -17
`30 . 0000
`
`dB
`MHz
`
`. 639
`4 : -11
`60 . 0000
`
`dB
`MHz
`
`5 : -13
`
`. 623
`
`dB
`
`80 . 0000
`
`MHz
`
`1
`
`2
`
`3
`
`4
`
`5
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000
`
`MHz
`
`Return Loss, Rx, Wire Side
`
`I = 0, I = 300 mA
`
`Page 55 of 93
`
`55
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -25
`
`. 583
`
`dB
`
`5. 942
`
`650
`
`MHz
`
`28 Jun 2000 13:18:56
`
`
`
`CH1 Markers
`
`. 681
`2 : -27
`2. 00000
`
`dB
`MHz
`
`. 987
`3 : -16
`30 . 0000
`
`dB
`MHz
`
`. 297
`4 : -11
`60 . 0000
`
`dB
`MHz
`
`5 : -13
`
`. 282
`
`dB
`
`80 . 0000
`
`MHz
`
`3
`
`4
`
`5
`
`MARKER 1
` 5.94265 MHz
`
`
`
`1
`
`2
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000
`
`MHz
`
`STOP
`
`100 . 000
`
`000
`
`MHz
`
`Return Loss, R = 0, R = 2.5 Ohms Series on RX Wire Side I = 0
`
`Page 56 of 93
`
`56
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -9 . 0510
`
`dB
`
`5 . 942
`
`650
`
`MHz
`
`28 Jun 2000 13:19:31
`
`
`
`CH1 Markers
`
`2 : -2 . 9035
`2. 00000
`
`dB
`MHz
`
`. 318
`3 : -14
`30 . 0000
`
`dB
`MHz
`
`. 595
`4 : -11
`60 . 0000
`
`dB
`MHz
`
`5 : -13
`
`. 910
`
`dB
`
`80 . 0000
`
`MHz
`
`3
`
`4
`
`5
`
`MARKER 1
` 5.94265 MHz
`
`1
`
`
`
`2
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000
`
`MHz
`
`STOP
`
`100 . 000
`
`000
`
`MHz
`
`Return Loss, R = 2.5 Ohm Series on RX Wire Side
`I = 0, I = 300 mA
`
`Page 57 of 93
`
`57
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`28 Jun 2000 13:20:08
`1 : -14 . 303
`dB
`
`5 . 942
`
`650 MHz
`
`
`
`MARKER 1
` 5.94265 MHz
`
`
`
`1
`
`2
`
`3
`
`4
`
`5
`
`CH1 Markers
`
`2 : -6 . 9295
`2 . 00000
`
`dB
`MHz
`
`3 : -15 . 542
`30 . 0000
`
`dB
`MHz
`
`4 : -11 . 507
`60 . 0000
`
`dB
`MHz
`
`5 : -13 . 655
`
`dB
`
`80 . 0000
`
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss, R = 2.5 Ohms Series on RX Wire Side
`I = 0, I = 200 mA
`
`Page 58 of 93
`
`58
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`28 Jun 2000 14:36:43
`1 : -18 . 029
`dB
`
`5 . 942
`
`650 MHz
`
`
`
`MARKER 1
` 5.94265 MHz
`
`
`
`1
`
`2
`
`3
`
`4
`
`5
`
`CH1 Markers
`
`2 : -10 . 899
`2 . 00000
`
`dB
`MHz
`
`3 : -16 . 504
`30 . 0000
`
`dB
`MHz
`
`4 : -11 . 749
`60 . 0000
`
`dB
`MHz
`
`5 : -13 . 841
`
`dB
`
`80 . 0000
`
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss, R = 1.25 Ohms Series on RX Wire Side
`I = 0, I = 200 mA
`
`Page 59 of 93
`
`59
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -12 . 478
`
`dB
`
`5. 942
`
`650 MHz
`
`28 Jun 2000 14:30:31
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`MARKER 1
` 5.94265 MHz
`
`
`
`CH1 Markers
`
`2 : -5 . 3025
`2. 00000
`
`dB
`MHz
`
`3 : -15 . 616
`30 . 0000
`
`dB
`MHz
`
`4 : -11 . 925
`60 . 0000
`
`dB
`MHz
`
`5 : -14 . 105
`
`dB
`
`80 . 0000
`
`MHz
`
`3
`
`4
`
`5
`
`1
`
`
`
`2
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss, R = 1.25 Ohms Series on RX Wire Side
`I = 0, I = 300 mA
`
`Page 60 of 93
`
`60
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -12 . 478
`
`dB
`
`5 . 942
`
`650 MHz
`
`28 Jun 2000 14:30:31
`
`
`
`MARKER 1
` 5.94265 MHz
`
`1
`
`
`
`2
`
`3
`
`4
`
`5
`
`CH1 Markers
`
`2 : -5 . 3025
`2. 00000
`
`dB
`MHz
`
`. 616
`3 : -15
`30 . 0000
`
`dB
`MHz
`
`. 925
`4 : -11
`60 . 0000
`
`dB
`MHz
`
`5 : -14
`
`. 105
`
`dB
`
`80 . 0000
`
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss, R = 1.25 Ohms Series on RX Wire Side
`I = 0, I = 300 mA
`
`Page 61 of 93
`
`61
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -38 . 074
`
`dB
`
`5. 942
`
`650 MHz
`
`28 Jun 2000 13:36:00
`
`
`
`MARKER 1
` 5.94265 MHz
`
`
`
`1
`
`2
`
`3
`
`4
`
`5
`
`CH1 Markers
`
`2 : -31 . 868
`2. 00000
`
`dB
`MHz
`
`3 : -25 . 038
`30 . 0000
`
`dB
`MHz
`
`4 : -16 . 102
`60 . 0000
`
`dB
`MHz
`
`5 : -12 . 158
`
`dB
`
`80 . 0000
`
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss Compare TX Wire Side to RX Wire Side
`I = 0
`
`Page 62 of 93
`
`62
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -36
`
`. 600
`
`dB
`
`5 . 942
`
`650
`
`MHz
`
`28 Jun 2000 13:36:39
`
`
`
`CH1 Markers
`
`. 710
`2 : -33
`2 . 00000
`
`dB
`MHz
`
`. 333
`3 : -25
`30 . 0000
`
`dB
`MHz
`
`. 149
`4 : -16
`60 . 0000
`
`dB
`MHz
`
`5 : -12
`
`. 230
`
`dB
`
`80 . 0000
`
`MHz
`
`3
`
`4
`
`5
`
`MARKER 1
` 5.94265 MHz
`
`
`
`1
`
`2
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000
`
`MHz
`
`STOP
`
`100 . 000
`
`000
`
`MHz
`
`Return Loss, TX Wire Side, R = 0, I = 0, I = 300 mA
`
`Page 63 of 93
`
`63
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`1 : -33 . 045
`
`dB
`
`5 . 942
`
`650 MHz
`
`28 Jun 2000 13:37:39
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`MARKER 1
` 5.94265 MHz
`
`CH1 Markers
`
`2 : -32 . 461
`2 . 00000
`
`dB
`MHz
`
`3 : -26 . 529
`30 . 0000
`
`dB
`MHz
`
`4 : -15 . 630
`60 . 0000
`
`dB
`MHz
`
`5 : -11 . 854
`
`dB
`
`80 . 0000
`
`MHz
`
`4
`
`5
`
`3
`
`
`
`1
`
`2
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss, R = 0, R = 1.25 Ohm Series TX Wire Side
`I = 0
`
`Page 64 of 93
`
`64
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`Magnetics
`Magnetics
`
`CH1
`
`S22 &M LOG
`
`20 dB/
`
`REF -20 dB
`
`28 Jun 2000 13:38:05
`1 : -21 . 204
`dB
`
`5. 942
`
`650 MHz
`
`
`
`MARKER 1
` 5.94265 MHz
`
`
`
`1
`
`2
`
`3
`
`4
`
`5
`
`CH1 Markers
`
`2 : -11 . 691
`2 . 00000
`
`dB
`MHz
`
`3 : -25 . 055
`30 . 0000
`
`dB
`MHz
`
`4 : -16 . 287
`60 . 0000
`
`dB
`MHz
`
`5 : -12 . 342
`
`dB
`
`80 . 0000
`
`MHz
`
`
`
`
`
`
`
`
`
`
`Cor
`
`
`
`
`
`
`
`
`
`
`
`START
`
`. 500
`
`000 MHz
`
`STOP
`
`100 . 000
`
`000 MHz
`
`Return Loss, R = 1.25 Ohm Series TX Wire Side
`I = 0, I = 300 mA
`
`Page 65 of 93
`
`65
`
`CHRIMAR 2046
`
`
`
`Summary of Common mode to
`Summary of Common mode to
`differential conversion
`differential conversion
`
`Freq
`(MHz)
`1
`8
`25
`63
`100
`
`Rxwire
`(dB)
`-78
`-60
`-40
`-29
`-25
`
`Txwire
`(dB)
`-71
`-54
`-45
`-34
`-27
`
`Freq
`(MHz)
`1
`16
`40
`70
`100
`
`Pair-Pair
`(dB)
`-74
`-54
`-53
`-47
`-43
`
`Pair Common-
`Mode (dB)
`-31
`-32
`-30
`-29
`-39
`
`Freq
`(Mhz)
`29
`37
`64
`72
`86
`
`Having a 2.5 Ohm R series with the Magnetics at 300mA degrades
`Conversion by 20dB at low frequency. Not an issue at -78dB
`
`Pair to Pair Isolation is superior to the Common Mode to
`Differential conversion of the magnetic
`
`Binding the 2 wires in the pair together causes isolation to
`approach the common mode to differential conversion of the
`magnetic (proved in following slides)
`
`Page 66 of 93
`
`66
`
`CHRIMAR 2046
`
`
`
`Summary of Return Loss
`Summary of Return Loss
`
`Tx (dB)
`
`RX (dB)
`
`Freq
`(MHz)
`
`Rseries=0
`Rseries=2.5 Rseries=1.25 Rseries=1.25
`Rseries=0
`2
`-30
`-3
`-5
`-33
`-12
`5
`-27
`-9
`-13
`-36
`-21
`30
`-18
`-14
`-16
`-25
`-25
`60
`-12
`-12
`-12
`-16
`-16
`80
`-13
`-14
`-14
`-12
`-12
`Question raised “What happens if there is an
`imbalance in the cable”
`
`Findings:
`• At 1.25 Ohms, 300 mA no errors after 8m length
`• At 1.25 Ohms, 240 mA no errors after 1m length
`• For 8m cable 1.25 Ohms is a 50% imbalance
`
`Page 67 of 93
`
`67
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics
`Operational Characteristics
`BER and Switching Noise
`BER and Switching Noise
`
`Cable Length
`
`Page 68 of 93
`
`68
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics
`Operational Characteristics
`BER and Switching Noise
`BER and Switching Noise
`
`• 10 Million Packets per Test
`• Covered 2 PHY/ 2 Magnetic Vendors
`• 10 and 100 Mbit/s Testing
`• Random Data Random Length Packets
`• Switching Power Supplies
`6 Watt Production 48 V to 3.3/1.8 V Supply
`50W 1/2 a Brick 48 V to 5 V Supply
`• Testing With and Without Switcher Filtering
`and EMI results
`
`Page 69 of 93
`
`69
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics,
`Operational Characteristics,
`Results
`Results
`
`Condition
`PHY One / Magnetic One
`Power OFF, RL=110 ohms see
`schematic max cable reach=163M
`Power ON 300 mA , RL=110 ohms
`Power ON, RL = 110ohm
`Power OFF, RL = 110ohm
`Power OFF, 6 Watt DC/DC replaces RL
`Note that no Filter exist at the input of
`the DC/DC in all my testing unless I say.
`Power OFF, 6 Watt DC/DC Rerun
`Power ON 6 Watt DC/DC
`Power ON 6 Watt DC/DC- Rerun test
`
`Errors,
`Cable
`Source
`Length
`163M 0
`
`Errors,
`Load
`0
`
`163M 0
`167M 318
`167M 315
`167M 322
`
`167M 323
`167M 295
`167M 308
`
`0
`0
`
`0
`
`0
`0
`0
`
`Conclusion: 6 Watt Switcher has no effect with or without Power,
`without Filter
`
`Page 70 of 93
`
`70
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics,
`Operational Characteristics,
`Results
`Results
`Errors,
`Cable
`Source
`Length
`163M 0
`167M 344 /
`334
`167M 2599 /
`1417
`156M 0 / 1
`
`Errors,
`Load
`0
`0 / 0
`
`108243/
`115988
`106 / 126
`
`Condition
`PHY One/Magnetic One
`No Power, No Load
`Power Off, 50 Watt Switcher Load
`Connected(Test 1/Test 2= a repeat)
`50 Watt Switcher(No Input Filter) with
`300 mA Load (Test 1/Test 2)
`50 Watt Switcher(No Input Filter) with
`300 mA Load (Test 1/Test 2)
`50 Watt Switcher(No Input Filter) with
`300 mA Load (Test 1/Test 2)
`50 Watt Switcher(No Input Filter) with
`300 mA Load (Test 1/Test 2)
`So We Lost 28M Due to this Switcher
`Conclusion: 50 Watt Switcher has no effect without Power, Needs
`Filtering With Power On
`
`140M 0 / 0
`
`135M 0 / 0
`
`7 / 5
`
`0 / 0
`
`Page 71 of 93
`
`71
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics,
`Operational Characteristics,
`Results
`Results
`
`Condition
`Phy One, Mag One
`No Power, No Load
`Power Off, 50 Watt Switcher Load
`Connected(Test 1/Test 2)
`50 Watt Switcher(With Input Filter) with
`300 mA Load (Test 1/Test 2/Test 3)
`50 Watt Switcher
`(With Input Filter) with 300 mA Load
`(Test 1/Test 2/Test 3)
`
`Errors,
`Load
`0
`0 / 0
`
`Errors,
`Cable
`Source
`Length
`163M 0
`167M 344 /
`334
`167M 100/10
`0 /385
`163M 0 / 0 / 0 0 / 0 / 0
`
`0 / 0 / 0
`
`Conclusion: 50 Watt Switcher With Filtering To Pass FCC
`Causes No Operational Effects on BER at Long Cable Lengths
`(28 Meter Loss Restored)
`
`Page 72 of 93
`
`72
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics,
`Operational Characteristics,
`Results
`Results
`
`Errors,
`Cable
`Source
`Length
`148M 0/0/0
`
`Condition
`PHY Two Magnetic Two
`Power OFF, RL=110 ohms see
`schematic max cable reach=148m
`Power ON 300 mA , RL=110 ohms
`Power OFF, RL = 110ohms
`Power OFF, RL = 110 ohms
`Power OFF, 6 Watt DC/DC replaces RL
`Note that no Filter exist at the input of
`the DC/DC in all my testing unless I say.
`148M 0/0/0
`Power ON 6 Watt DC/DC
`Ran 100 Million packets Power OFF/ON 148M 0/0
`163M 0/0/0
`Power ON 6 Watt DC/DC- Rerun test
`128M 0
`10BT 5 Million Packets of CAT-3
`148M 0
`10BT Ran 5 million packets CAT-5
`
`148M 1/0/0
`156M 0/0/0
`163M 0/0/0
`148M 0/0/0
`
`Errors,
`Load
`0/0/0
`
`0/0/2
`0/5/0
`60/34/15
`0/0/0
`
`1/0/0
`0/2
`32/34
`0
`0
`
`Page 73 of 93
`
`73
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`BER and Switching Noise
`BER and Switching Noise
`
`6 Watt Switching Noise (Unfiltered) at Tx Center Tap
`
`Page 74 of 93
`
`74
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`BER and Switching Noise
`BER and Switching Noise
`
`Cable Attached
`
`100
`Frequency (MHz)
`
`Horizontal
`
`Vertical
`
`Class B Limit @ 3 Meters
`
`1000
`
`80
`
`70
`
`60
`
`50
`
`40
`
`30
`
`20
`
`10
`
`Electric Field (dBuV/m)
`
`0
`
`10
`
`6 Watt Switching Noise FCC Scan, Fails Class B, with
`Unchanged BER at Cable Length
`
`Page 75 of 93
`
`75
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics,
`Operational Characteristics,
`Results
`Results
`Cable
`Length
`148M
`
`Condition
`Phy Two/Magnetic Two
`No Power, No Load
`
`Errors,
`Source
`0
`
`Errors,
`Load
`0
`
`Power Off, 50 Watt Switcher Load Connected(Test
`1/Test 2= a repeat)
`50 Watt Switcher(No Input Filter) with 300 mA
`Load (Test 1/Test 2/test3)
`50 Watt Switcher(No Input Filter) with 200 mA
`Load (Test 1/Test 2)
`50 Watt Switcher(No Input Filter) with 200 mA
`Load (Test 1/Test 2)
`50 Watt Switcher(No Input Filter) with 200 mA
`Load (Test 1/Test 2 /Test 3)
`50 Watt Switcher(No Input Filter) with 200 mA
`Load (Test 1/Test 2 /Test 3)
`50 Watt Switcher(No Input Filter) with 200 mA
`Load (Test 1/Test 2)
`Decided to Stick with Wcase Noise 200ma load
`here- we lost a good 48M
`
`148M
`
`148M
`
`148M
`
`124M
`
`103M
`
`100M
`
`92M
`
`0 / 0
`
`0/0/0
`
`2/0
`
`11/2
`
`0/00
`
`1/0/0
`
`0 / 0
`
`0 / 0
`
`136/29/40
`
`3423/3245
`
`0/0
`
`1/0/0
`
`0/0/0
`
`0 / 0
`
`Page 76 of 93
`
`76
`
`CHRIMAR 2046
`
`
`
`Operational Characteristics,
`Operational Characteristics,
`Results
`Results
`Cable
`Length
`148M
`148M
`
`Errors,
`Source
`0
`0/0
`
`Errors,
`Load
`0
`0 / 0
`
`Condition
`Phy Two, Mag Two
`No Power, No Load
`Power Off, 50 Watt Switcher Load
`Connected(Test 1/Test 2)
`50 Watt Switcher(With Input Filter on one
`center tap) with 200 mA Load (Test
`1/Test 2) Stuck to 200mA- Wcast noise!
`50 Watt Switcher
`(With Input Filter on Both Center taps)
`with 200 mA Load (Test 1/Test 2)
`100 Million Packets at 200ma w/ Filter on
`both Center taps next to DC/DC
`100 Million Packets at 300ma w/ Filter on
`both Center taps next to DC/DC
`Conclusion: A Filter on the Switcher Input Restores Link Integrity
`
`148M
`
`202/172 0 / 0
`
`148M
`
`0 / 0 / 0
`
`0/0/1
`
`148M
`
`148M
`
`0
`
`0
`
`0
`
`1
`
`Page 77 of 93
`
`77
`
`CHRIMAR 2046
`
`
`
`50 W Switching Noise, Reference
`50 W Switching Noise, Reference
`
`Page 78 of 93
`
`50 Watt Switching Noise (Unfiltered) at 300 mA
`
`78
`
`CHRIMAR 2046
`
`
`
`50 W Switching Noise, Reference
`50 W Switching Noise, Reference
`
`50 Watt Switching Noise (Unfiltered) at 200 mA (There’s More Noise)
`
`Page 79 of 93
`
`79
`
`CHRIMAR 2046
`
`
`
`Switching Noise: What’s DC?
`Switching Noise: What’s DC?
`
`Green: Choke, Cap,
`Ferrite Cap
`
`Blue: Unfiltered
`
`Red: Choke, Cap
`
`Switching Power Supply Noise. Red is the likely best case
`
`Page 80 of 93
`
`80
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`BER and Switching Noise
`BER and Switching Noise
`
`50 Watt Switching Noise (Unfiltered) at Tx Center Tap
`
`Page 81 of 93
`
`81
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`BER and Switching Noise
`BER and Switching Noise
`
`Supply Powering DC/DC Convertor.
`
`100
`Frequency (MHz)
`
`Horizontal
`
`Vertical
`
`Class B Limit @ 3 Meters
`
`1000
`
`80
`
`70
`
`60
`
`50
`
`40
`
`30
`
`20
`
`10
`
`Electric Field (dBuV/m)
`
`0
`
`10
`
`50 Watt Switching Noise FCC Scan, Fails Class B, with No
`Input Filter, Affects BER, Reduces Cable Length
`
`Page 82 of 93
`
`82
`
`CHRIMAR 2046
`
`
`
`Signal Quality Measurements
`Signal Quality Measurements
`BER and Switching Noise
`BER and Switching Noise
`
`50 Watt Switching Noise (Filtered) at Tx Center Tap
`
`Page 83 of 93
`
`83
`
`CHRIMAR 204
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