HP 8560A, Service Manual

Page: 98 / 450

17. Signal ID Oscillator Adjustment
Cables
BNC, 122 cm (48 in) (2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A
Test Cable, BNC (m) to SMB (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedure
1.
2.
3.
4.
5.
6.
7.
Set the HP 8560A switch off, disconnect the power cord, and remove the analyzer
cover. Fold down the Al5 RF and Al4 Frequency Control assemblies. Prop up the A14
Frequency Control assembly.
Connect the HP 8560A CAL OUTPUT to the INPUT using an adapter. Disconnect
the W29 cable from (10.7 MHz IF out) and connect the SMB end of the test
cable to Connect the rest of the equipment as shown in Figure 2-20.
Reconnect the power cord and set the switch on. After the power-on sequence is
complete, set the HP 8560A controls as follows:
C E N T E R F R E Q
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz
Press INTERNAL MIXER SIG ID ON SGL SWP.
Press on the HP and set the controls as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . 10.7 MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Set the HP 5343A controls as follows:
SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully Counterclockwise
SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Hz-500 MHz/500 MHz-26.5 SWITCH . . . . . . . . . . . .10 Hz-500 MHz
If no signal is displayed on the HP adjust SIG ID until a signal is
displayed.
Note If the 298 MHz SIG ID oscillator is severely mistuned, it might be necessary to
widen the span on the HP
to see the shifted sweep.
8. Rotate SIG ID slightly while observing the HP display. If the
displayed signal frequency does not change, press SGL SWP on the HP 8560A.
2-64 Adjustment Procedures