Agilent Technologies 856290216 service manual Procedure

12. 10 MHz Reference Adjustment-TCXO (Option 103)

Procedure

Note	Allow the	spectrum analyzer to warm up for at least 30 minutes before
	performing	this adjustment.

1.Connect the equipment as shown in Figure 2-20. Prop up the Al4 frequency control assembly.

2.Set the frequency counter controls as follows:

Sample rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Midrange 50 R-l MR switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 0 10 Hz-500 MHz/500 MHz-26.5 GHz switch . . . . . . . . . . . . . . .10 Hz-500 MHz

3. Press (mCTRL) REllR PANEL. Verify that the 10 MHz reference is set to 10 MHz INT .

Note When the 10 MHz reference is set to 10 MHz EXT, the TCXO is not operating

and warmed up. If the reference is set to 10 MHz ENT , set the reference to

10 MHz INT and allow 30 minutes for the TCXO to warm up.

4.Remove dust cap from A15U302, TCXO. The dust cap is toward the rear of the spectrum analyzer.

5.Adjust 10 MHz ADJ on A15U302 for a frequency counter reading of 300.000000 MHz f30 Hz.

6.Replace the dustcap on A15U302.

2-52 Adjustment Procedures