HP 8562E, Service Manual

Page: 78 / 482

7. YTO Adjustment
This adjustment cannot be performed if preselected external mixer mode is
selected.
The ON OFF function must be OFF.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Press (LINE) to turn the spectrum analyzer off. Remove the spectrum analyzer cover and
fold down the Al5 RF and Al4 frequency control assemblies.
Disconnect the 50 termination from the first LO OUTPUT. Connect the equipment as
shown in Figure 2-13. Press
to turn the spectrum analyzer on.
Move the jumper on 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.
On the spectrum analyzer, press the following keys:
, (UNPR)
EXTERNAL MIXER, LOCK HARMONIC,6 Hz
(SPAN), ZERO SPAN
(FREQUENCY), CENTER
SAVE
SAVE STATE, STATE
35.7493
SAVE
SAVE STATE, STATE 1
[RECALL), RECALL STATE, STATE 0.
On the HP press 7 and set the controls as follows:
Sample rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully counterclockwise
10 Hz-500 MHz/500 MHz-26.5 switch . . . . . . . . . . 500 MHz-26.5
Adjust 3.2 for the appropriate frequency counter reading of 3.200
MHz.
On the spectrum analyzer, press STATE .
Adjust 6.01 for a frequency counter reading of 6.010 MHz.
On the spectrum analyzer, press STATE 0 .
Repeat steps 6 through 9 until both of these interacting adjustments meet their
tolerances.
2-36 Adjustment Procedures