TM 11-6625-2781-14&P-2
Section VIII
Table 8-4. System Test and Troubleshooting Procedure (cont' )
d
TEST
FAULT
PROCEDURE
6. Set analyzer controls as follows:
Signal incorrect
See System Test and Troubleshooting
BANDWIDTH ....................... 10 kHz
or missing
Procedure in 8552 Operating and
FINE TUNE ....................... centered
Service Manual.
SCAN WIDTH . PER DIVISION
SCAN WIDTH
PER DIVISION ..................... 20 kHz
INPUT ATTENUATION............ 0 dB
TUNING STABILIZER ............. OFF
BASELINE CLIPPER................. ccw
LOG REF LEVEL............... -30 dBm
LOG REF LEVEL
Vernier................................ .......ccw
LOG/LINEAR ........................... LOG
VIDEO FILTER ........................ OFF
SCAN TIME
PER DIVISION .................... 2 msec
Connect a 50 MHz -33 dBm signal
from the 606B to the W6 jack behind
the tuning dial assembly on the top of
the 8553 using the 1159260001
cable. Tune the 606B slightly around
50 MHz until the signal is centered.
With the AMPL CAL centered the
signal should read -30 dBm +2 dBm.
If signal is correct, reconnect W6 and
proceed to test 7.
NOTE
In steps 7a and 7e it is necessary to simulate the input impedance of the circuit following the
point tested to insure accuracy of the meter readings. Use the HP 11563A 50-ohm tee, two HP
1250-0780 BNC jack to type N Plug Adapters, the HP 11593A termination, the HP 11592-60001
subminiature to BNC cable, and the HP 1250-0827 jack-to-jack adapter
7. Perform the following sub-tests until a
malfunction has been found and
corrected, then repeat test 5.
8-15
