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LTPH-UM-1031-03, Issue 3 Testing
H4TU-C-319 List 1 September 12, 2003 57
TESTING WITH H4TU-R BERT GENERATOR
The H4TU-R BERT Generator screen allows transmission of an unframed test signal from the H4TU-R towards
either the network (NET) or customer (CPE). Bit error rates are calculated and display on the Monitor screen.
1 Press to logon remotely, then press to select the Config menu (Figure 31).
2 Use the and arrow keys to select BERT Generator, then press .
3 Use the arrow keys to select an option, then press the to cycle through the settings. Refer to
Table 19 on page 56 for a list of BERT Generator option settings.
4 Press to activate your choice.
5 To view BERT status, press twice, then, using the arrow key to select the Monitor menu, press
.
6 Press to return to the H4TU-C logon screen. You can exit the status screen while signal generation is active.
Figure 31. H4TU-R BERT Generator Screen
The test pattern is sent out either from the line unit towards the network (toward NET) or from
the remote unit towards the customer (toward CPE). Both test payloads must be looped back so
they can be returned to the unit for BER detection. BER detection is performed in the line unit
for both switch settings.
Tests done towards the NET must be looped at some point external to the higher circuit. Tests
done towards the CPE can either be looped back at some external point beyond the remote unit,
or they can be looped back internally by a higher loopback, such as NREM. The test payload,
for the CPE direction, also passes back and forth over the HDSL4 link to the H4TU-C before it is
analyzed for errors.
R C
↑ ↓
ENTER
SPACEBAR
ENTER
ESC
←
ENTER
R
M
onitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
|
BERT Generator -> |
+--------------------------------------+
| BERT Signal Generator : ENA |
| BERT Signal Pattern : 1 in 8 |
| BERT Signal Linecode : AMI |
| BERT Signal Direction : NET only |
| BERT Interval : Continuous |
+--------------------------------------+
Use <Spacebar> to cycle through option settings and <Enter> to activate
ID: xxxx—-xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-R System: OK___