GE LOGIQ E9 Service Manual page 300

GE
D 5535208-100, R
IRECTION
7-5-8-5 Noise (cont'd)
Name: Noise Floor Test
Description: Measures the noise floor of the System. The entire system is required for this diagnostic.
The noise floor is calculated from IQ data received without a signal source.
Run Time: 00:02
1.) See:
continues:
2.) Try a new probe (channels in the probe may be faulty). If the problem continues:
3.) Run the tests for
7-5-8-6 Transmit
Name: GTX High Speed Bit Error Test
Description: High Speed Bit Error Test on the GTX
Run Time: 00:03
If this test failed:
1.) Swap GTX boards to determine if the failure point changes as the boards are moved.
2.) Replace any failed GTX boards.
3.) Interface to GFI may be the cause of the failure. See:
Name: Tx P6 Illegal Waveform Test
Description: Transmits an illegal waveform and checks the error registers.
Run Time: 03:21
If this test failed:
1.) Swap GTX boards to determine if the failure point changes as the boards are moved.
2.) Replace any failed GTX boards.
3.) Interface to GFI may be the cause of the failure. See:
7 - 52
. 2
EV
7-5-19 "Noise" on page 7-97
7-5-8-8 "Analog Receive" on page
Section 7-5 - Common Service Desktop
for information on minimizing environmental noise. If the problem
7-54.
7-5-8-3 "GFI" on page
7-5-8-3 "GFI" on page
LOGIQ E9 S M
ERVICE ANUAL
7-46.
7-46.