HP 8562E Service Manual page 346

Narrow 10 kHz resolution bandwidth:
the board required.
IF Gain Compression in 10 kHz resolution bandwidth:
and Q503 can deteriorate with age. Measuring less than 0 volts on the FET source indicates a
bad FET.
R L
C E N T E R 300.0000MHz C E N T E R 300.0000MHz
* R B W 3.0kHz * R B W 3.0kHz
Refer to function blocks B, H, and I of A5 IF filter schematic diagram (sheets 1 of 3 and
2 3) HP 8560 E-Series Spectrum Analyzer Component Level Information.
of in the
3. Disconnect W29 (coax 7) from A5J3 and W27 (coax 3) from A5J5.
4. Inject a -5 dBm, 10.7 MHz signal into A5J3.
5. Monitor the output of A5J5 with another spectrum analyzer.
6. Simultaneously decrease the signal generator output and HP 85623 spectrum analyzer
reference level in 10 dB steps down to a -50 dBm reference level.
7. At each step, the signal displayed on the other spectrum analyzer should be close to
reference level steps.)
8. Reconnect W29 to A5J3 and W27 (coax 3) to A5J5.
Check for printed-circuit board contamination. Clean
\ \
V B W 3.0kHz V B W 3.0kHz
Figure 9-15. Faulty Crystal Symmetry
FET transistors Q202, Q203, Q501,
B R O K E N SYMMEbTRY B R O K E N SYMMEbTRY
\ \
S P A N 100.0kHz S P A N 100.0kHz
S W P 7 0 m s S W P 7 0 m s
S K 1 8 4
IF Section 9-31