20. Tracking Oscillator Adjustment (Option 002)

Procedure

1.Remove the A10 Tracking Generator Assembly as described in Chapter 3. With the A10 Tracking Generator positioned next to the the HP 8560A, reconnect W14 (lo-wire ribbon cable) to AlOJl. Reconnect W48 to AlOJ8. Connect the 50 R termination to AlOJ3.

2.Connect the equipment as shown in Figure 2-23. The frequency counter provides the frequency reference for the synthesized sweeper and the HP 8560A.

SPECTRUM ANALYZER

BNC TEE

SJ14

Figure 2-23. Tracking Oscillator Adjustment Setup

3. Set the HP 8560A LINE switch on. Press (mCTRL), TRACKING GENRATOR , SRC PWR ON, (AUX-), 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..300MHz SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

4. Press INSTR PRESET on the synthesized sweeper and set the controls as follows:

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2107GHz P O W E R L E V E L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +12dBm 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 GHz Switch . . . . . . . . . . . . . . . . 10 Hz-500 MHz 50 R - 1MR Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 fl

6.Remove the dust cap screw used to seal the tracking oscillator adjustment.

7.On the HP 856OA, press (m), TRACKING GEMRATOR , MORE 1 OF 3, MAN TRK ADJ , a, a. Rotate the knob counterclockwise until FINE TRACK ADJ is set to 0.

2-72 Adjustment Procedures