17. Signal ID Oscillator Adjustment

Cables

BNC, 122 cm (48 in) (2 required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A Test Cable, BNC (m) to SMB (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85680-60093

Procedure

1.Set the HP 8560A LuNE) 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.

2.Connect the HP 8560A CAL OUTPUT to the INPUT 500 using an adapter. Disconnect the W29 cable from A15J601 (10.7 MHz IF out) and connect the SMB end of the test cable to A15J601. Connect the rest of the equipment as shown in Figure 2-20.

3.Reconnect the power cord and set the luNE) 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..300MHz SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz

4.Press (mCTRL) INTERNAL MIXER SIG ID ON SGL SWP.

5.Press (INSTR PRESET) on the HP 8566A/B and set the controls as follows:

CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . 10.7 MHz FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 kHz

6.Set the HP 5343A controls as follows:

SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully Counterclockwise 50R-1MR SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 10 Hz-500 MHz/500 MHz-26.5 GHz SWITCH . . . . . . . . . . . .10 Hz-500 MHz

7.If no signal is displayed on the HP 8566A/B, adjust A15C629 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 8566A/B to see the shifted sweep.

 

 

 

8.Rotate A15C629 SIG ID slightly while observing the HP 8566A/B display. If the displayed signal frequency does not change, press SGL SWP on the HP 8560A.

2-64 Adjustment Procedures