Measuring E1 Signal Level - VeEX MTT-14B User Manual

MTT-14B e_Manual D07-00-083P RevA00

3.7 Measuring E1 Signal Level

STU
Figure 50 Measuring E1 Signal Level
A signal level measurement can be performed by itself or in
conjunction with one of the other tests.
1. Select the Rx PORT level to use. The measurement can be
performed using TERM, MONITOR, or BRIDGE. A 1111 pattern
in Rx PORT TERM or BRIDGE provides the most accurate
results. MONITOR generally shows a result of about -20 or
-30 dB. TERM will disrupt service. BRIDGE: Measurement
may be degraded by a low-quality termination at the network
element terminating the E1 line.
2. The rest of this procedure will use the TERM mode for illustra-
tive purposes. Verify that the span is not in service.
3. From the module main menu, select TEST CONFIGURATION
and configure as follows:
MODE: STUC E1, STUR E1, or E1
Tx SOURCE: TESTPAT
FRAMING: As specified by the circuit design.
CRC-4: As specified by the circuit design.
TEST RATE: 2.048M
Rx PORT: TERM
TX CLOCK : INTERN
When finished, press ENTER.
4. Connect the test set into the circuit as shown in Figure 50
and press HISTORY to acknowledge any blinking LEDs.
5. From the module MAIN MENU, select E1 MEASUREMENT
and press START (F3).
6. Press PAGE-DN (F2) until the E1 ALARM/SIGNAL screen is
displayed and read the signal level. Note that separate read-
ings are given for the positive and negative signals so that you
can get more accurate information on a faulty regenerator.
MON
TX
RX
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