1-54
General Information
Specifications
Payload: Cross Cell PRBS, Single Cell
PRBS, User Byte, Test Cell.
Background cells:
Number of backgrounds: 3
Background density: Individually
settable from 0 to maximum after
foreground allocation in1% steps.
Distribution: Periodic as for Constant
Bit Rate service.
Payload: Fixed byte.
Fill cells: Idle or Unassigned. Payload
GA (Hexadecimal)
ATM Receiver
Interface bit rate: 2.048 Mb/s, 34.368
Mb/s, 139.264 Mb/s ±100 ppm
unbalanced.
155.52 Mb/s, 622.08 Mb/s ±999 ppm
unbalanced.
Pattern Synchronization:
Sync loss: BER ≥ 20% over 100 ms for
PRBS or ≥ 4% over 100 ms for word
patterns.
Sync gain: 32 consecutive error free
bits received.
Equalization at f/2: 12 dB
Monitor point compensation:
2.048 Mb/s: 20 dB, 26 dB or 30 dB.
34.368 Mb/s, 139.264 Mb/s: 20 dB or
26 dB.
Frame Formats: As transmitter.
Frame Alignment: Out of Frame after
4 consecutive errored framing patterns.
Frame regain after 2 consecutive error
free framing patterns.
Loss Of Frame -At detection of Out Of
Frame a 3 ms window is started. If the
system remains Out of Frame for the
duration of the window then Loss Off
Frame is activated. If in frame is
detected during the 3 mS window the
timer is reset.
Cell layer modes: UNI, NNI
Cell layer headers: VPI, VCI, GFC,
PTI, CLP.
Payload: Cross Cell PRBS, Single Cell
PRBS, User Byte, Test Cell, Live
Traffic.
Test cell synchronization:
Sync loss: 7 consecutive errored cells.
Sync gain: 6 consecutive error free
cells.
REMOTE CONTROL:
HP-IB + RS-232-C option A3D.
HP-IB + RS-232-C + LAN interface
option A3B.
Virtual Remote option UHE Distributed
network Analyzer option USS
PDH MULTIPLE OUTPUTS
(Option UHC): Provides three
additional output signals (BNC
connectors). Specifications same as for
unbalanced signal output. Bit delay
relative to main output:
704 kb/s, 2 Mb/s, 8 Mb/s, 34 Mb/s:
O/P 2 - 4 bits
O/P 3 - 8 bits
O/P 4 - 12 bits
140 Mb/s: No bit delay.
MEASUREMENTS and
ANALYSIS
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 - seconds,
minutes, hours, days
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