HP 8560A, Service Manual

Page: 106 / 450

20. Tracking Oscillator Adjustment (Option 002)
Procedure
1.
2.
Remove the A10 Tracking Generator Assembly as described in Chapter 3. With the A10
Tracking Generator positioned next to the the HP
reconnect W14 (lo-wire ribbon
cable) to Reconnect W48 to Connect the 50 termination to
Connect the equipment as shown in Figure 2-23. The frequency counter provides the
frequency reference for the synthesized sweeper and the HP 8560A.
Figure 2-23. Tracking Oscillator Adjustment Setup
3. Set the HP 8560A LINE switch on. Press TRACKING GENRATOR , SRC PWR ON,
REAR PANEL, and 10 MHz EXT . Allow the HP 8560A to warmup for at least
five minutes. Set the controls as follows:
C E N T E R F R E Q
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz
4. Press INSTR PRESET on the synthesized sweeper and set the controls as follows:
CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P O W E R L E V E L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FREQUENCY STANDARD Switch (rear panel) . . . . . . . . . . . . . . . . . . . . . . EXT
5. Set the frequency counter controls as follows:
SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully CCW
10 Hz-500 MHz 500 MHz-26.5 Switch . . . . . . . . . . . . . . . . 10 Hz-500 MHz
50 Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6. Remove the dust cap screw used to seal the tracking oscillator adjustment.
7. the HP press TRACKING GEMRATOR , MORE 1 OF 3, MAN TRK ADJ ,
Rotate the knob counterclockwise until FINE TRACK ADJ is set to 0.
2-72 Adjustment Procedures