IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`rx_code_vector[BI_D4]four1'.hternary symbol prior to start of third data code group
`
`PMA Align shall continue sending PMA_UNITDATA.indicate (DATA) messages until pma_carrier=OFF.
`While pma_carrie1=OFF, PMA Align shall emit PMA_UNITDATA.ir1dicate (IDLE) messages.
`
`If no valid SSD pattern is recognized within 22 ternary symbol times of the assertion of pma_carrier=ON,
`the PMA Align function shall set rxerror_status=ERROR. The PMA Align function is permitted to begin
`sending PMA_UNITDATA.indicate (DATA) messages upon receipt of a partially recognized SSD pattern,
`but it is required to set rxerror_status=ERROR if the complete SSD does not match perfectly the expected
`ternary symbol sequence. Rxerror_status shall be reset to NO_ERROR when pma_carrier=OFF.
`
`The PMA Align function is permitted to use the first received packet of at least minimum size after RESET
`or the transition to LINK_PASS to learn the nominal skew between pairs, adjust its equalizer, or perform any
`other
`initiation
`functions. During
`this
`first packet,
`the PMA Align
`function
`shall
`emit
`PMA_UNITDATA.indicate (PREAMBLE) messages, but may optionally choose to never begin sending
`PMA_UNITDATA.ir1dicate ODATA) messages.
`
`The PMA Align function shall tolerate a maximum skew between any two pairs of 60 ns in either direction
`without error.
`
`To protect the network against the consequences of mistaken packet framing, the PMA Align function shall
`detect the following error and report it by setting rxerror_status=ERROR (optionally, those error patterns
`already detected by codeword_error, dc_balance_error, or eop_error do not also have to be detected by
`rxerror_status): In a series ofgoodpackets, any one packet that has been corrupted with three orfewer ter-
`nary symbols in error causing its sosb 6T code groups on one or more pairs to appear in the wrong location.
`
`Several approaches are available for meeting this requirement, including, but not limited to, a) comparing
`the relative positions of sosb 6T code groups on successive packets; b) measuring the time between the first
`preamble pulse and reception of sosb on each pair; c) counting the number of zero crossings from the begin-
`ning of the preamble until sosb; and d) monitoring for exception strings like “l 1” and “—l—l—1” in conjunc-
`tion with one or more of the above techniques.
`
`Regardless of other considerations, when the receive function is disabled (rcv=DISABLE), the PMA Align
`function shall emit PMA_UNITDATA.indicate (IDLE) messages and no others.
`
`23.4.1.7 Clock Recovery function
`
`The Clock Recovery function couples to all three receive pairs. It provides a synchronous clock for sampling
`each pair. While it may not drive the lVlII directly, the Clock Recovery function is the underlying root source
`of RX CLK.
`
`The Clock Recovery function shall provide a clock suitable for synchronously decoding ternary symbols on
`each line within the bit error tolerance provided in 23.4.1.3. During each preamble, in order to properly rec-
`ognize the frame delimiting pattern formed by code word sosb on each pair, the received clock signal must
`be stable and ready for use in time to decode the following ternary symbols: the 16th ternary symbol of pair
`RX_D2, the 18th temary symbol of pair BI_D4, and the 14th ternary symbol of pair BI_D3.
`
`23.4.2 PMA interface messages
`
`The messages between the PMA and PCS are defined above in 23.3, PMA Service Interface. Communica-
`tion between a repeater unit and PMA also uses the PMA Service Interface. Communication through the
`MDI is summarized in tables 23-2 and 23-3.
`
`This is anlegchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`
`
`Aerohive - Exhibit 1025
`
`0125
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`Table 23-2—MDl signals transmitted by the PHY
`
`
`
`
`Table 23-3—Signals received at the MDI
`
`TP_IDL_l00 is defined in 23.4.1.2. The waveforms used to convey CS1, CS0, and CS—1 are defined in
`23.5.1.2.
`
`TP_IDL_1 00 is defined in 23.4.1.2. The encodings for CS1, CS0, and CS—1 are defined in 23.5.1.2.
`
`Re-timing of CS1, CS0, and CS—1 signals within the PMA is required.
`
`23.4.3 PMA state diagrams
`
`The notation used in the state diagrams follows the conventions of 21.5. Transitions shown without source
`states are evaluated continuously and take immediate precedence over all other conditions.
`
`23.4.3.1 PMA constants
`
`CSO
`
`CS 1
`
`CS—1
`
`A waveform that conveys the ternary symbol 0.
`
`Value:
`
`CS0 has a nominal voltage of 0 V. See 23.5.1.2.
`
`A waveform that conveys the ternary symbol 1.
`
`Value:
`
`CS1 has a nominal peak voltage of +3.5 V. See 23.5.1.2.
`
`A waveform that conveys the ternary symbol -1.
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`0126
`
`1025
`
`Aerohive - Exhibit 1025
`
`0126
`
`

`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`Value:
`
`CS-1 has a nominal peak voltage of -3.5 V. See 23.5.1.2.
`
`This is anpfirchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`
`
`Aerohive - Exhibit 1025
`
`0127
`
`

`
`CSMA/CD
`
`link_100_max
`A constant.
`
`IEEE
`Std 802.3u-1995
`
`Value:
`
`Greater than 5.0 ms and less than 7.0 ms.
`
`Used by link_max_timer to detect the absence of 100BASE-T4 link test pulses on pair RX_D2.
`
`link_l00_min
`A constant.
`
`Value:
`
`Greater than 0.15 ms and less than 0.45 ms.
`
`Used by cnt_link to detect link test pulses on pair RX_D2 that are too close together to be valid
`100BASE-T4 link test pulses.
`
`23.4.3.2 State diagram variables
`
`pma_reset
`Causes reset of all PCS functions.
`
`Values:
`
`Set by:
`
`ON and OFF
`
`PMA Reset
`
`pma_carrier
`
`rcv
`
`xmit
`
`A version of carrier_status used internally by the PMA sublayer. The variable pma_carrier always
`functions regardless of the link status. The value of pma_carrier is passed on through the PMA
`service interface as carrier_status when rcv=ENABLE. At other times, the passage ofpma_carrier
`information to the PMA service interface is blocked.
`
`Values:
`
`Set by:
`
`ON, OFF
`
`PMA CARRIER
`
`Controls the flow of data from the PMA to PCS through the PMA_UNlTDATA.indicate message.
`
`Values:
`
`ENABLE (receive is enabled)
`DISABLE (the PMA always sends PMA_UNlTDATA.indicate GDLE), and
`carrier_status is set to OFF)
`
`Controls the flow of data from PCS to PMA through the PMA_UNITDATA.request message.
`
`Values:
`
`ENABLE (transmit is enabled)
`DISABLE (the PMA interprets all PMA_UNITDATA.request messages
`as PMA_UNITDATA.request (IDLE). The PMA transmits no data, but
`continues sending TP_IDL_l00).
`
`23.4.3.3 State diagram timers
`
`link_max_timer
`
`A re-triggerable timer.
`
`Values:
`
`The condition link_max_timer_done goes true when the timer expires.
`
`Restart when:
`
`Timer is restarted for its full duration by every occurrence of either a link test
`pulse on pair RX_D2 or the assertion of pma_carrier=ON (restarting the timer
`resets the condition link_max_tirner_done).
`
`Duration:
`
`link_l00_max
`
`Used by Link Integrity to detect the absence of 100BASE-T4 link test pulses on pair RX_D2.
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`'t 1025
`0128
`
`Aerohive - Exhibit 1025
`
`0128
`
`

`
`IEEE
`Std 802.3u-1995
`
`23.4.3.4 State diagram counters
`
`cnt_1ink
`
`SUPPLEMENT TO 802.3:
`
`Counts number of 100BASE—T4 link test pulses (see 23.5.1.3.1) received on pair RX_D2.
`
`Values:
`Reset to zero:
`
`nonnegative integers
`On either of two conditions:
`
`a) While in any state other than LINK_PASS, reset counter to zero if successive
`link test pulses are received within link_100_min.
`b) While in any state, reset to zero if 1ink_max_timer expires.
`
`While in the LINK_PASS state, ignore pulses received within1ink_100_min (i.e., do not count
`them).
`
`23.4.3.5 Link Integrity state diagram
`
`The Link Integrity state diagram is shown in figure 23-12.
`
`(|ink_contro| = DISABLE ) + ( pma_reseI = 0N )
`
`cnt_|ink <2 0
`rev ¢= DISABLE
`xmit = DISABLE
`|ink_status c FAIL
`pma_type = 100BASE-T4
`
`L|NK_FA|L_EXTEND
`
`|ink_status 4: FAIL
`
`( pma_carrier = OFF )
`
`
`"nk_maX_timer_done
`
`* ( b(_data_element = IDLE )
`
` WA|T_31
`
`link_status <= FAIL
`
`WA|T_FOR_ENABLE
`
`|ink_status <= READY
`
`
`
`
`
`|ink_contro| = ENABLE
`
`cnt_Iink = 31
`
`
`link_max_timer_done
`
`""k_”‘aX_”"‘e'_d°”e
`
`
`
`L|NK_FA|L
`
`Iink_status = FAIL
`
`LINK_PASS
`rcv : ENABLE
`xmit <= ENABLE
`pma_type = T4
`|ink_status c OK
`
`|ink_max_timer_done
`
`(cnt_|ink =127 )
`+ (pma_carrier = ON )
`
`
`
`
`
`|ink_max_timer_done
`
`+ Iink_contro|=SCAN_FOR_CARR|ER
`
`
`This is anpfirchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`
`
`1025
`
`0129
`
`Aerohive - Exhibit 1025
`
`0129
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`23.5 PMA electrical specifications
`
`This clause defines the electrical characteristics of the PHY at the MDI.
`
`The ground reference point for all common-mode tests is the IVHI ground circuit. Implementations without
`an lVlII use the chassis ground. The values of all components in test circuits shall be accurate to within :|:1%
`unless otherwise stated.
`
`23.5.1 PMA-to-MDI interface characteristics
`
`23.5.1.1 Isolation requirement
`
`The PHY shall provide electrical isolation between the DTE, or repeater circuits including frame ground,
`and all MDI leads. This electrical separation shall withstand at least one of the following electrical strength
`tests:
`
`1500 V rms at 50 Hz to 60 Hz for 60 s, applied as specified in subclause 5.3.2 of IEC 950: 1991.
`a)
`2250 Vdc for 60 s, applied as specified in subclause 5.3.2 of IEC 950: 1991.
`b)
`c) A sequence of ten 2400 V impulses of alternating polarity, applied at intervals of not less than 1 s.
`The shape of the impulses shall be 1.2/50 us (1.2 its virtual front time, 50 its virtual time or half
`value), as defined in IEC 60.
`
`There shall be no insulation breakdown, as defined in subclause 5.3.2 of IEC 950: 1991, during the test. The
`resistance after the test shall be at least 2 M9, measured at 500 Vdc.
`
`23.5.1.2 Transmitter specifications
`
`The PMA shall provide the Transmit function specified in 23.4.1.2 in accordance with the electrical specifi-
`cations of this clause.
`
`Where a load is not specified, the transmitter shall meet requirements of this clause when each transmit out-
`put is connected to a dilferentially connected 100 Q resistive load.
`
`23.5.1.2.1 Peak differential output voltage
`
`O O] (leftmost ternary
`O
`0 — 1
`0
`0 0 O
`1
`While repetitively transmitting the ternary sequence [0 O
`symbol first), and while observing the differential transmitted output at the MDI, for any pair, with no inter-
`vening cable, the absolute value of both positive and negative peaks shall fall within the range of 3.15 V to
`3.s5v (3.5v: 10%).
`
`23.5.1.2.2 Differential output templates
`
`While repetitively transmitting the ternary sequence [0 0 1 O O 0 O O -1 0 0 0], and while observ-
`ing the transmitted output at the MDI, the observed waveform shall fall within the normalized transmit tem-
`plate listed in table 23-4. Portions of this table are represented graphically in figure 23-13. The entire
`normalized transmit template shall be scaled by a single factor between 3.15 and 3.85. It is a functional
`requirement that linear interpolation be used between points. The template time axis may be shifted horizon-
`tally to attain the most favorable match. In addition to this simple test pattern, all other pulses, including link
`integrity pulses and also including the first pulse of each packet preamble, should meet this same normalized
`transmit template, with appropriate shifting and linear superposition of the CS1 and CS—l template limits.
`Transmitters are allowed to insert additional delay in the transmit path in order to meet the first pulse
`requirement, subject to the overall timing limitations listed in 23.11, Timing summary.
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`tl025
`0130
`
`Aerohive - Exhibit 1025
`
`0130
`
`

`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`While transmitting the TP_IDL_l00 signal, and while observing the transmitted output at the MDI, the
`observed waveform shall fall within the normalized link pulse template listed in table 23-4. Portions of this
`table are represented graphically in figure 23-14. The entire template shall be scaled by the same factor used
`for the normalized transmit template test. It is a functional requirement that linear interpolation be used
`between template points. The template time axis may be shifted horizontally to attain the most favorable
`match.
`
`Afier transmitting seven or more consecutive CSO waveforms during the TP_IDL_l 00 signal, each pair, as
`observed using the 100BASE-T4 Transmit Test Filter (23.5.l.2.3) connected to the MDI, shall attain a state
`within 50 mV of zero.
`
`When the TX_Dl, BI_D3, or BI_D4 pair is driven with a repeating pattern (1 -1 1 — 1
`measured at the MDI output shall be at least 27 dB below the fundamental at 12.5 MHz.
`
`...) any harmonic
`
`NOTES
`
`l—The specification on maximum spectral components is not intended to ensure compliance with regulations
`concerning RF emissions. The implementor should consider any applicable local, national, or international reg-
`ulations. Additional filtering of spectral components may therefore be necessary.
`
`0 -1 O O 0] (leftmost ternary symbol first) may be synthe-
`2—The repetitive pattern [0 0 1 0 O O 0
`sized using the 8B6T coding rules from a string of repeating data octets with value 73 hex. The repetitive pat-
`tern [ 1 -1 1 -1 1 -1] (leftmost ternary symbol first) may be synthesized using the 8B6T coding rules
`from a string of repeating data octets with value 92 hex.
`
` - ! i -
`
`'fi—I|J'l-.fiTh“-I
`
`II-h<I'I-—4iI
`
`
`
`This is anpfirchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`0131
`
`tl025
`
`Aerohive - Exhibit 1025
`
`0131
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`The ideal template values may be automatically generated from the following equations:
`
`Laplace transform of
`Ideal transmit response
`
`Ideal“)
`IdealResp0nse(s) = LPF(s)
`
`Where Ideal(s)
`
`is a 100% raised cosine system response
`
`Where LPF(s)
`
`is a 3-pole Butterworth low pass filter response with -3 dB point at 25 MHz
`
`Convert IdealRe.sponse(s) from frequency domain to time domain
`
`Use at least 8 samples per ternary symbol for the conversion
`
`Superimpose alternating positive and negative copies of the ideal time
`response, seperated by 6 ternary symbol times, to form the ideal transmit voltage waveform.
`
`The template limits are formed by offsetting the ideal transmit voltage waveform by plus and minus 6% of
`its peak.
`
`23.5.1.2.3 Differential output ISI (intersymbol interference)
`
`While observing a pseudo—random 8B6T coded data sequence (with every 6T code group represented at
`least once) preceded by at least 128 octets and followed by at least 128 octets of data, and while observing
`the transmitted output through a l00BASE-T4 Transmit Test Filter (one implementation of which is depicted
`in figure 23-16), the ISI shall be less than 9%. The ISI for this test is defined by first finding the largest of the
`three peak-to-peak ISI error voltages marked in figure 23-15 as TOP ISI, MIDDLE ISI, and BOTTOM ISI.
`
`The largest of these peak-to-peak ISI error voltages is then divided by the overall peak-to-peak signal volt-
`age. (The technique of limiting the ratio of worst ISI to overall peak-to-peak voltage at 9% accomplishes the
`same end as limiting the ratio of worst ISI to nominal peak-to-peak at 10%.)
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standgrd.
`
`
`
`Aerohive - Exhibit 1025
`
`0132
`
`

`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`Table 23-4—Normalized voltage templates as measured at the MDI
`
`transmit
`template, pos.
`limit
`
`Normalized
`transmit
`template, neg.
`limit
`
`.
`.
`1\It(:;l1ml':tzeed 3:1‘
`pfimit’ P '
`
`.
`.
`Nt?;nm:l:tzee(:llelnk
`plimi;
`g’
`
` Normalized
`
`0
`
`0.060
`
`-0.061
`
`0.061
`
`-0.060
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`70
`
`75
`
`80
`
`0.067
`
`0.072
`
`0.072
`
`0.063
`
`0.047
`
`0.030
`
`0.023
`
`0.041
`
`0.099
`
`0.206
`
`0.358
`
`0.544
`
`0.736
`
`0.905
`
`1.020
`
`1.060
`
`-0.054
`
`-0.049
`
`-0.049
`
`-0.058
`
`-0.074
`
`-0.091
`
`-0.098
`
`-0.080
`
`-0.022
`
`0.085
`
`0.237
`
`0.423
`
`0.615
`
`0.784
`
`0.899
`
`0.940
`
`0.899
`
`0.056
`
`0.052
`
`0.052
`
`0.058
`
`0.071
`
`0.086
`
`0.094
`
`0.080
`
`0.027
`
`-0.076
`
`-0.231
`
`-0.428
`
`-0.640
`
`-0.829
`
`-0.954
`
`-0.977
`
`-0.876
`
`-0.065
`
`-0.069
`
`-0.069
`
`-0.063
`
`-0.050
`
`-0.035
`
`-0.027
`
`-0.041
`
`-0.094
`
`-0.197
`
`-0.352
`
`-0.549
`
`-0.761
`
`-0.950
`
`-1.075
`
`-1.098
`
`-0.997
`
`85
`
`90
`
`95
`
`100
`
`105
`
`110
`
`115
`
`120
`
`125
`
`130
`
`135
`
`140
`
`145
`
`150
`
`155
`
`160
`
`165
`
`170
`
`175
`
`1.020
`
`0.907
`
`0.744
`
`0.560
`
`0.384
`
`0.239
`
`0.137
`
`0.077
`
`0.053
`
`0.050
`
`0.057
`
`0.064
`
`0.067
`
`0.065
`
`0.061
`
`0.057
`
`0.055
`
`0.056
`
`0.059
`
`0.786
`
`0.623
`
`0.439
`
`0.263
`
`0.118
`
`0.016
`
`-0.044
`
`-0.068
`
`-0.071
`
`-0.064
`
`-0.057
`
`-0.054
`
`-0.056
`
`-0.060
`
`-0.064
`
`-0.066
`
`-0.065
`
`-0.062
`
`-0.653
`
`-0.332
`
`0.044
`
`0.419
`
`0.738
`
`0.959
`
`1.060
`
`1.044
`
`0.932
`
`0.759
`
`0.565
`
`0.383
`
`0.238
`
`0.138
`
`0.081
`
`0.057
`
`0.054
`
`0.058
`
`-0.774
`
`-0.453
`
`-0.077
`
`0.298
`
`0.617
`
`0.838
`
`0.940
`
`0.923
`
`0.811
`
`0.638
`
`0.444
`
`0.262
`
`0.117
`
`0.017
`
`-0.040
`
`-0.064
`
`-0.067
`
`-0.063
`
`This is anpfgchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`Aerohive - Exhibit 1025
`
`0133
`
`Aerohive - Exhibit 1025
`
`0133
`
`

`
`CSMAICD
`
`IEEE
`Std 802.3u-1995
`
`Table 23-4—Normalized voltage templates as measured at the MDI (Continued)
`
`transmit
`template, pos.
`limit
`
`Normalized
`transmit
`template, neg.
`limit
`
`.
`.
`1\It(:;l1ml':tzeed 3:1‘
`pfimit’ P '
`
`.
`.
`Nt?;nm:l:tzee(:llelnk
`plimi;
`g’
`
` Normalized
`
`180
`
`0.062
`
`-0.059
`
`0.063
`
`-0.058
`
`185
`
`190
`
`195
`
`200
`
`205
`
`210
`
`215
`
`220
`
`225
`
`230
`
`235
`
`240
`
`245
`
`250
`
`255
`
`260
`
`0.064
`
`0.064
`
`0.062
`
`0.060
`
`0.057
`
`0.056
`
`0.058
`
`0.061
`
`0.064
`
`0.066
`
`0.065
`
`0.061
`
`0.054
`
`0.049
`
`0.049
`
`0.058
`
`-0.057
`
`-0.057
`
`-0.059
`
`-0.061
`
`-0.064
`
`-0.065
`
`-0.063
`
`-0.060
`
`-0.057
`
`-0.055
`
`-0.056
`
`-0.060
`
`-0.067
`
`-0.072
`
`-0.072
`
`-0.063
`
`-0.047
`
`0.064
`
`0.063
`
`0.060
`
`0.058
`
`0.058
`
`0.059
`
`0.060
`
`0.062
`
`0.062
`
`0.062
`
`0.061
`
`0.060
`
`0.060
`
`0.060
`
`0.060
`
`0.061
`
`0.061
`
`-0.057
`
`-0.058
`
`-0.061
`
`-0.063
`
`-0.063
`
`-0.062
`
`-0.061
`
`-0.059
`
`-0.059
`
`-0.059
`
`-0.060
`
`-0.061
`
`-0.061
`
`-0.061
`
`-0.061
`
`-0.060
`
`-0.060
`
`265
`
`270
`
`275
`
`280
`
`285
`
`290
`
`295
`
`300
`
`305
`
`310
`
`315
`
`320
`
`325
`
`330
`
`335
`
`340
`
`345
`
`350
`
`355
`
`0.074
`
`0.091
`
`0.099
`
`0.080
`
`0.022
`
`-0.085
`
`-0.238
`
`-0.423
`
`-0.615
`
`-0.783
`
`-0.899
`
`-0.940
`
`-0.899
`
`-0.786
`
`-0.623
`
`-0.439
`
`-0.263
`
`-0.118
`
`-0.016
`
`-0.030
`
`-0.022
`
`-0.041
`
`-0.099
`
`-0.206
`
`-0.359
`
`-0.544
`
`-0.736
`
`-0.904
`
`-1.020
`
`-1.061
`
`-1.020
`
`-0.907
`
`-0.744
`
`-0.560
`
`-0.384
`
`-0.239
`
`-0.137
`
`0.061
`
`0.061
`
`0.060
`
`0.060
`
`0.060
`
`0.060
`
`0.061
`
`0.061
`
`0.061
`
`0.061
`
`0.060
`
`0.060
`
`0.060
`
`0.060
`
`0.061
`
`0.061
`
`0.061
`
`0.061
`
`-0.060
`
`-0.060
`
`-0.061
`
`-0.061
`
`-0.061
`
`-0.061
`
`-0.060
`
`-0.060
`
`-0.060
`
`-0.060
`
`-0.061
`
`-0.061
`
`-0.061
`
`-0.061
`
`-0.060
`
`-0.060
`
`-0.060
`
`-0.060
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`Aerohive - Exhibit 1025
`
`0134
`
`Aerohive - Exhibit 1025
`
`0134
`
`

`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`Table 23-4—Normalized voltage templates as measured at the MDI (Continued)
`
`Normalized
`transmit
`template, pos.
`limit
`
`Normalized
`transmit
`template, neg.
`limit
`
`Normalized link
`template, pos.
`limit
`
`Normalized link
`template, neg.
`limit
`
`It is a mandatory requirement that the peak-to-peak ISI, and the overall peak-to-peak signal voltage, be mea-
`sured at a point in time halfway between the nominal zero crossings of the observed eye pattern.
`
`It is a mandatory requirement that the 100BASE-T4 Transmit Test Filter perform the function of a third-
`order Butterworth filter with its -3 dB point at 25.0 MHz.
`
`One acceptable implementation of a 100BASE-T4 Transmit Test Filter appears in figure 23-16. That imple-
`mentation uses the 100BASE-T4 Transmit Test Filter as a line termination. The output of the filter is termi-
`nated in 100 Q. It is a mandatory requirement that such implementations of the 100BASE-T4 Transmit Test
`Filter be designed such that the reflection loss of the filter, when driven by a 100 9 source, exceeds 17 dB
`across the frequency range 2 to 12.5 MHz.
`
`This is an1.9g'chive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`Aerohive - Exhibit 1025
`
`O l 3 5
`
`Aerohive - Exhibit 1025
`
`0135
`
`

`
`IEEE
`Std 802.3u-1995
`
`,%
`
`I g E I I
`
`n §I
`
`II
`
`I
`
`‘
`
`*
`
`W
`
`* —~—:§
`n a
`
`CSMA/CD
`
`volts
`
`ISI measurement point is
`defined halfway between
`nominal zero crossings
`of eye pattern
`
`Equivalent circuits that implement the same overall transfer function are also acceptable. For example, the
`IOOBASE-T4 Transmit Test Filter may be tapped onto a line in parallel with an existing termination. It is a
`mandatory requirement that such implementations of the 100BASE-T4 Transmit Test Filter be designed with
`an input impedance sufficiently high that the reflection loss of the parallel combination of filter and 100 Q
`termination, when driven by 100 Q, exceeds 17 dB across the frequency range 2 to 12.5 MHz.
`
`635 nH
`
`
`
`TRANSMIT
`DEVICE
`UNDER
`TEST
`
`+
`
`TEST FILTER
`OUTPUT
`
`L-3i19% L TRANSMIT 4TEST FILTER
`
`C's :i: 5%
`R's 1 1%
`
`
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`0136
`
`1025
`
`Aerohive - Exhibit 1025
`
`0136
`
`

`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`23.5.1 .2.4 Transmitter differential output impedance
`
`The differential output impedance as measured at the MDI for each transmit pair shall be such that any
`reflection due to differential signals incident upon the MDI fitom a balanced cable having an impedance of
`100 S2 is at least 17 dB below the incident signal, over the frequency range of 2.0 MHz to 12.5 MHz. This
`return loss shall be maintained at all times when the PHY is fully powered.
`
`With every transmitter connected as in figure 23-17, and while transmitting a repeating sequence of packets
`as specified in table 23-3, the amount of droop on any transmit pair as defined in figure 23-18 during the
`transmission of eopl and eop4 shall not exceed 6.0%.
`
`TRANSMIT
`DEVICE
`
`UNDER
`TEST
`
`MDI
`
`+
`
`* 1: 1% as measured at 100 kHz
`
`
`
`zero crossing
`
`droop =A EV1
`
`50 9*
`
`MD'
`
`RECEIVE
`DEVICE
`UNDER
`
`Balanced square wave source
`50% duty cycle
`3.5 V amplitude
`480 ns period
`
`20 ns or faster rise/fall
`
`TEST
`
`*1 1% as measured at 100 kHz
`
`This is anlegchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`
`
`1025
`
`0137
`
`Aerohive - Exhibit 1025
`
`0137
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`Table 23-5—Sequence of packets for droop test
`
`
`
`23.5.1 .2.5 Output timing jitter
`
`While repetitively transmitting a random sequence of valid 8B6T code words, and while observing the
`output of a 100BASE-T4 Transmit Test Filter connected at the MDI to any of the transmit pairs as specified
`in 23.5. 1 .2.3, the measured jitter shall be no more than 4 ns p—p. For the duration of the test, each of the other
`transmit pairs shall be connected to either a IOOBASE-T4 Transmit Test Filter or a 100 Q resistive load.
`
`NOTES
`
`1—Jitter is the difference between the actual zero crossing point in time and the ideal time. For various ternary transi-
`tions, the zero crossing time is defined differently. For transitions between +1 and -1 or vice versa, the zero crossing
`point is defined as that point in time when the voltage waveform crosses zero. For transitions between zero and the other
`values, or from some other value to zero, the zero crossing time is defined as that point in time when the voltage wave-
`form crosses the boundary between logical voltage levels, halfway between zero volts and the logical +1 or logical —l
`ideal level.
`
`2—The ideal zero crossing times are contained in a set ofpoints {tn} where tn = to + n/f, where n is an integer, andfis in
`the range 25.000 MHz i 0.01%. A collection of zero crossing times satisfies the jitter requirement if there exists a pair
`(to,f) such that each zero crossing time is separated from some member of {tn} by no more than 4 ns.
`
`23.5.1 .2.6 Transmitter impedance balance
`
`The common-mode to diiferential-mode impedance balance of each transmit output shall exceed
`
`29 — l7log(%)dB
`
`wherefis the frequency (in MHz) over the frequency range 2.0 MHZ to 12.5 MHz. The balance is defined as
`
`201 E“elm)
`
`where Ecm is an externally applied sine-wave voltage as shown in figure 23-20.
`
`NOTE—The balance of the test equipment (such as the matching of the test resistors) must be insignificant relative to
`the balance requirements.
`
`23.5.1.2.7 Common-mode output voltage
`
`The implementor should consider any applicable local, national, or international regulations. Driving
`unshielded twisted pairs with high-frequency, common-mode voltages may result in interference to other
`equipment. FCC conducted and radiated emissions tests may require that, while transmitting data, the mag-
`nitude of the total common-mode output voltage, Ecmwut), on any transmit circuit, be less than a few milli-
`volts when measured as shown in figure 23-21.
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this stanqlgrd.
`
`tl025
`0138
`
`Aerohive - Exhibit 1025
`
`0138
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`TRANSMIT
`DEVICE
`UNDER
`TEST
`
`PG
`
`:
`
`TRANSMIT
`DEVICE
`UNDER
`TEST
`
`MDI
`
`
`
`‘Resistor matching to 1 part in 1000.
`
`MDI
`
`.
`$47.5 :2
`
`0
`
`§47'5Q 49.9 9. Ecmwut)
`
`PG
`
`.
`
`*Resistor matching to 1 part in 10 000.
`
`23.5.1 .2.8 Transmitter common-mode rejection
`
`The application of Ecm as shown in figure 23-20 shall not change the differential voltage at any transmit out-
`put, Edif, by more than 100 mV for all data sequences while the transmitter is sending data. Additionally, the
`edge jitter added by the application of Ecm shall be no more than 1.0 ns. Ecm shall be a 15 V peak 10.1 MHz
`sine wave.
`
`23.5.1.2.9 Transmitter fault tolerance
`
`Transmitters, when either idle or nonidle, shall withstand without damage the application of short circuits
`across any transmit output for an indefinite period of time and shall resume normal operation after such
`faults are removed. The magnitude of the current through such a short circuit shall not exceed 420 mA.
`
`Transmitters, when either idle or nonidle, shall withstand without damage a 1000 V common-mode impulse
`applied at Ecm of either polarity (as indicated in figure 23-22). The shape of the impulse shall be 0.3/50 us
`(300 ns virtual front time, 50 us virtual time of half value), as defined in IEC 60.
`
`23.5.1.2.10 Transmit clock frequency
`
`The ternary symbol transmission rate on each pair shall be 25.000 MHz :1: 0.01%.
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this standgrd.
`
`
`
`Aerohive - Exhibit 1025
`
`0139
`
`

`
`25
`
`
`
`40
`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`MDI
`
`110 :2
`
`.
`E 402 9
`
`§ 402 :2
`
`TRANSMIT
`DEV CE
`UNDIER
`TEST
`
`PG
`
`Em
`
`*Resistor matching to 1 part in 100.
`
`23.5.1.3 Receiver specifications
`
`The PMA shall provide the Receive function specified in 23.4.1.3 in accordance with the electrical specifica-
`tions of this clause. The patch cables and interconnecting hardware used in test configurations shall meet
`Category 5 specifications as in ISO/IEC 11801: 1995.
`
`The term worst-case UTP model, as used in this clause, refers to lumped—element cable model shown in fig-
`ure 23-23 that has been developed to simulate the attenuation and group delay characteristics of 100 m of
`worst-case Category 3 PVC UTP cable.
`
`This constant resistance filter structure has been optimized to best match the following amplitude and group
`delay characteristics, where the argumentfis in hertz, and the argument x is the cable length in meters. For
`the worst-case UTP model, argument x was set to 100 m, and the component values determined for a best
`least mean squared fit of both real and imaginary parts of H(fi x) over the frequency range 2 to 15 MHz.
`
`NOTE—This group delay model is relative and does not includes the fixed delay associated with 100 111 of Category 3
`cable. An additional 570 ns of fixed delay should be added in order to obtain the absolute group delay.
`
`PropagationImag(f, x) = j(—l0)
`
`Pr0pagationReal(f, x) = —(7.1 i% + 0.701L()6)(%)
`
`PropagationImag(f, x) + Propagatz'0nReal(f, x)
`20
`
`H(f,x) = 10
`
`23.5.1.3.1 Receiver differential input signals
`
`Differential signals received on the receive inputs that were transmitted within the constraints of 23.5.1.2,
`and have then passed through a worst-case UTP model, shall be correctly translated into one of the
`PMA_UNITDATA.ir1dicate messages and sent to the PCS. In addition, the receiver, when presented with a
`
`This is anlegrchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`Aerohive - Exhibit 1025
`
`0140
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`R13
`50
`
`R14
`
`50
`
`
`Receive side
`
`L's :I: 10%
`C's 1: 5%
`R's 11%
`
`link test pulse generated according to the requirements of 23.4. 1 .2 and followed by at least 3T of silence on
`pair RX_D2, shall accept it as a link test pulse.
`
`Both data and link test pulse receive features shall be tested in at least two configurations: using the worst-
`case UTP model, and with a connection less than one meter in length between transmitter and receiver.
`
`A receiver is allowed to discard the first received packet after the transition into state LINK_PASS, using
`that packet for the purpose of fine-tuning its receiver equalization and clock recovery circuits.
`
`NOTE—Implementors may find it practically impossible to meet the requirements of this subclause without using some
`form of adaptive equalization.
`
`23.5.1.3.2 Receiver differential noise immunity
`
`The PMA, when presented with 8B6T encoded data meeting the requirements of 23.5.1.3.1, shall translate
`this data into PMA_UNITDATA.indicate (DATA) messages with a bit loss of no more than that specified in
`23.4.1.3.
`
`The PMA Carrier Sense function shall not set pma_carrier=ON upon receiving any of the following signals
`on pair RX_D2 at the receiving MDI, as measured using a l00BASE-T4 transmit test filter (23.5. 1 .2.3):
`
`a) All signals having a peak magnitude less than 325 mV.
`b) All continuous sinusoidal signals of amplitude less than 8.7 V peak-to-peak and frequency less than
`1.7 MHZ.
`
`c) All sine waves of single cycle or less duration, starting with phase 0° or 180°, and of amplitude less
`than 8.7 V peak-to-peak, where the frequency is between 1.7 MHz and 15 MHz. For a period of
`7 BT before and after this single cycle, the signal shall be less than 325 mV.
`
`This is an Archive IEEE Standard.
`
`It has been superseded by a later version of this stanqigrd.
`
`
`
`Aerohive - Exhibit 1025
`
`0141
`
`

`
`IEEE
`Std 802.3u-1995
`
`SUPPLEMENT TO 802.3:
`
`cl)
`e)
`
`Fast link pulse burst (FLP burst), as defined in clause 28.
`The link integrity test pulse signal TP_IDL_l00.
`
`23.5.1.3.3 Receiver differential input impedance
`
`The difierential input impedance as measured at the MDI for each receive input shall be such that any reflec-
`tion due to differential signals incident upon each receive input from a balanced cable having an impedance
`of 100 S2 is at least 17 dB below the incident signal, over the fiequency range of 2.0 MHz to 12.5 MHz. This
`return loss shall be maintained at all times when the PHY is firlly powered.
`
`With each receiver connected as in figure 23-19, and with the source adjusted to simulate eopl and eop4
`(50% duty cycle square wave with 3.5 V amplitude, period of 480 ns, and risetime of 20 ns or faster), the
`amount of droop on each receive pair as defined in figure 23-18 shall not exceed 6.0%.
`
`23.5.1 .3.4 Common-mode rejection
`
`While receiving packets from a compliant l00BASE—T4 transmitter connected to all MDI pins, a receiver
`shall send the proper PMA_UNITDATA.indicate messages to the PCS for any differential input signal Es
`that results in a signal Edif that meets 23.5.1.3.1 even in the presence of common-mode voltages Em
`(applied as shown in figure 23-24). Ecm shall be a 25 V peak—to—peak square wave, 500 kHz or lower in fre-
`quency, with edges no slower than 4 ns (20%—80%), connected to each of the receive pairs RX_D2, BI_D3,
`and BI D4.
`
`“'0'
`
`RECEIVE
`DEVICE
`UNDER
`TEST
`
`
`
`* Resistor matching to 1 part in 1000.
`
`23.5.1.3.5 Receiver fault tolerance
`
`The receiver shall tolerate the application of short circuits between the leads of any receive input for an
`indefinite period of time without damage and shall resume normal operation after such faults are removed.
`Receivers shall withstand without damage a 1000 V common-mode impulse of either polarity (Ecm as indi-
`cated in figure 23-25). The shape of the impulse shall be 0.3/50 us (300 ns virtual front time, 50 us virtual
`time of half value), as defined in IEC 60.
`
`23.5.1.3.6 Receiver frequency tolerance
`
`The receive feature shall properly receive incoming data with a ternary symbol rate within the range
`25.000 MHz i 0.01%.
`
`This is anlétrchive IEEE Standard.
`
`It has been superseded by a later version of this standard.
`
`0142
`
`1025
`
`Aerohive - Exhibit 1025
`
`0142
`
`

`
`CSMA/CD
`
`IEEE
`Std 802.3u-1995
`
`Mm
`
`RE