HP 37718A Installation And Verification Manual page 25

General Information
Specifications
CAS signalling: Modify and monitor
ABCD signalling bits (PCM30 or
PCM30CRC framing)
Receiver capture range:
All rates: ±100 ppm.
External 2 Mb/s Mux I/P: Meets ITU-T
Rec. G.703, unbalanced HDB3 signal
only.
Jitter tolerance: To ITU-T Rec G.823.
Synchronization: Sync loss when BER
≥ 20% over 100 ms for PRBS or ≥ 4%
over100 ms for word patterns. Sync
gain when 32 consecutive error free bits
received.
Equalization at f/2:
2.048 Mb/s, 8.448 Mb/s: 6 dB
34.368 Mb/s, 139.264 Mb/s: 12 dB
Monitor point compensation:
2.048 Mb/s, 8.448 Mb/s: 20 dB, 26 dB or
30 dB.
34.368, 139.264 Mb/s: 20 dB or 26 dB.
Frame alignment
2 Mb/s: As ITU-T Rec. G.706
2 Mb/s CRC4: As ITU-T Rec. G.706.
2 Mb/s CAS: As ITU-T Rec. G.732.
8 Mb/s: As ITU-T Rec. G.742.
34 Mb/s: As ITU-T Rec. G.751.
140 Mb/s: As ITU-T Rec. G.751.
Frame gain 2 Mb/s: 1 correct sequence
of FAS-NFAS-FAS.
Frame loss 2 Mb/s: 3 consecutive
incorrect FAS or NFAS words.
Frame gain 2 Mb/s CAS: 1 correct CAS
multiframe and the previous CAS word
is not 0000.
Frame loss 2 Mb/s CAS: 2 consecutive
errored CAS multiframe patterns or 16
frames with CAS word 0000.
Test timing: Manual, single fixed, timed
start
Timed start: Single test period starts at a
preset time.
Duration: 1 hour, 24 hours, 72 hours, 7
days, user-defined
User-defined: 1 to 99 - days, hours,
minutes, seconds.
Real-time clock: Date, time and elapsed
test time.
Error summary: Bit, Code, Frame,
CRC, REBE - error count and ratio
Error analysis
Bit, Frame - All rates,
ITU-T G.821:
CRC REBE - 2 Mb/s only.
Error count
Severely errored seconds
Percentage severely errored seconds
Errored seconds
Errored seconds Annex D (Bit
errors only)
Percentage errored seconds
Error-free seconds
Percentage error-free seconds
Unavailability
Percentage unavailability
Degraded minutes
Percentage degraded minutes
Code error seconds
Elapsed time
:
M.2100
TX Error seconds, RX error
seconds. TX severely errored seconds,
RX severely errored seconds, TX
unavailability, RX unavailability.
M.2110: 2 hour BIS result, 24 hour BIS
result, 7 day BIS result.
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