Agilent Technologies 856290216 service manual YTO Main Coil Adjustments

7. YTO Adjustment

Procedure

Note	This adjustment cannot be performed if preselected external mixer mode is
	selected.

The SAVELOCK ON OFF function must be OFF.

YTO Main Coil Adjustments

1.Press (LINE) to turn the spectrum analyzer off. Remove the spectrum analyzer cover and fold down the Al5 RF and Al4 frequency control assemblies.

2.Disconnect the 50 R termination from the first LO OUTPUT. Connect the equipment as shown in Figure 2-13. Press luNE) to turn the spectrum analyzer on.

3.Move the jumper on A14J23 from the NORM position (pins 1 and 2 jumpered) to the TEST position (pins 2 and 3 jumpered). See Figure 2-14 for the location on the Al4 frequency control assemblies.

4.On the spectrum analyzer, press the following keys:

(m)EXT NXR PRE UNPR , (UNPR)

(m-, EXTERNAL MIXER, LOCK HARMONIC,6 Hz

(SPAN), ZERO SPAN

(FREQUENCY), CENTER FRE$,18.8893 GHz ,[mSWP)

07SAVE SAVE STATE, STATE 0 [@EZEkV),35.7493GHz

07SAVE SAVE STATE, STATE 1

[RECALL), RECALL STATE, STATE 0.

5.On the HP 5343A, press [SHIFT) 7 and set the controls as follows:

Sample rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully counterclockwise

10Hz-500 MHz/500 MHz-26.5 GHz switch . . . . . . . . . . 500 MHz-26.5 GHz

6.Adjust A14R93 3.2 GHz for the appropriate frequency counter reading of 3.200 GHz fl MHz.

7.On the spectrum analyzer, press STATE 1 .

8.Adjust A14R42 6.01 GHz for a frequency counter reading of 6.010 GHz &l MHz.

9.On the spectrum analyzer, press STATE 0 .

10.Repeat steps 6 through 9 until both of these interacting adjustments meet their tolerances.

2-36 Adjustment Procedures