ADTRAN Total Access 3000 - Page 254

Total Access
®
3000/3010 System Manual
6TAATP602-1E
TOTAL ACCESS 3000/3010
ATP-602
Page 4 of 6
© 2002, ADTRAN, Inc.
C. Set the DS-3 pattern generator for a normal test pattern (i.e. QRSS, 2
20
-1,
etc.).
D Set the DS-3 Network Loopback.
E Verify RX frequency is ± 20 ppm (± 895 bits/sec) or better.
7. Output Jitter Level Test
A. Connect the test circuit shown in Figure 5.
B. Set the DS-3 pattern generator to “Local Timing.”
C. Set the DS-3 test pattern to QRSS on the pattern generator.
D. Set the DS-3 MUX to “Loop Timing.”
E. Set up a Network Loopback on the DS-3 MUX.
F. Set the LBO to “Long” on the DS-3 MUX.
G. Verify that the wideband jitter is ≤ 5.0 UI and the highband jitter is ≤
0.1 UI, where 1 UI = 22.4 ns.
8. Pulse Amplitude Test
Use the circuit illustrated in Figure 1 for this procedure.
A. Select an isolated ones pattern on the pattern generator.
Figure 5. Output Jitter Level Test Circuit
WECO 728A
or
Equivalent
WECO 728A
or
Equivalent
DS-3 Pattern Generator
RX RXTXTX
TTC-310
Total Access 3000/3010 DS-3 Transmission Analyzer
TTC-310
(225 ft.)(225 ft.)
Figure 4. Line Rate Accuracy Test Circuit
TX
WECO 728A
or
Equivalent
WECO 728A
or
Equivalent
DS-3 Pattern Generator
RX TX
TTC-310
Total Access 3000/3010
DS-3 Transmission
Analyzer
TTC-310
(<150 ft.)(<150 ft.)