GE LOGIQ E9 Service Manual page 309

D 5180483-100, R
IRECTION
7-5-12-25 Analog CW
.
Table 7-35
Line
1
2
3
7 - 106
PROPRIETARY TO GE
. 7
EV
Figure 7-74 Analog CW
Analog CW
Name:
A sum of sine waves with the same frequency, but different
phase, gives a sine wave output where the amplitude is a function
of the different phase settings.
The test uses small overlapping groups (4 channels) where the
channel pairs have different phase settings. Any amplitude
deviation detected in this test, should indicate that there is
MRX aCW Beam something wrong with phase setup. For each subtest, a signal is
Forming set up with f0=2.521 MHz, the BP filter at 3.1 MHz and a mixer
frequency of 2.5 MHz. The dither and Pedof probe inputs are
disabled. The parameters tested are: fdop, spectrum peak, RMS
and SNR on the I-data.
Are the probes connected? The test will run with probes
connected to the scanner, but it is recommended to disconnect all
probes before running diagnostics.
For each subtest, a signal is setup with f0=2.521 MHz, the BP
filter at 3.1 MHz and a mixer fr equency of 2.5 MHz. The dither and
Pedof probe inputs are disabled. The number of sub-test, with
identical setup, is by default, eight. For the I/Q- symmetry test, the
MRX aCW IQ DC-component and RMS value for both the Iand Q-part of the
Symmetry data set are measured. The symmetry quality measurement for
this test is calculated from the RMS values for each sub-test.
Are the probes connected? The test will run with probes
connected to the scanner, but it is recommended to disconnect all
probes before running diagnostics.
For the Mixer Clock Sync test, a signal is set up with f0=2.521
MHz, the BP filter at 3.1 MHz and a mixer frequency of 2.5 MHz.
The dither and Pedof probe inputs are disabled. The test enables
one channel pair, plus each of the other channel pairs per sub
MRX aCW Mixer
test, one at the time. The parameters to test for are fdop,
Clock Sync
spectrum peak, RMS and SNR on the I-data.
Are the probes connected? The test will run with probes
connected to the scanner, but it is recommended to disconnect all
probes before running diagnostics.
Section 7-5 - Common Service Desktop
LOGIQ E9 P
Description:
S M
ROPRIETARY ERVICE ANUAL
If this test
Run Time: failed:
Replace the
00:05
MRX Board.
Replace the
00:05
MRX Board.
Replace the
00:05
MRX Board.