HP 8560A Service Manual page 72

7. YTO Adjustment
Procedure
Note
This adjustment cannot be performed if the analyzer preselected external
mixer mode is selected.
1.
Set the HP 8560A m switch off. Remove the analyzer cover and fold down the Al5 RF
and Al4 Frequency Control assemblies.
2.
Disconnect the 50R termination from the 1ST LO OUTPUT. Connect the equipment as
shown in Figure 2-10. Set the LuNE) switch on.
3.
Move the jumper on A14523 from the NORM position (pins 1 and 2 jumpered) to the
TEST position (pins 2 and 3 jumpered).
4.
On the HP 8560A, press the following keys:
EXT MXR UMPR
EXTERNAL MIXER
(FREQUENCY) CENTER FREQ
(SAVE) SAVE STATE STATE 1
5.
On the HP 5343A, press (SHIFT) 7 and set the controls as follows:
SAMPLE RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully Counterclockwise
10 Hz-500 MHz/506 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
7.
On the HP 8560A, press
8.
Adjust A14R42 6.01 GHz for a frequency counter reading of 6.010 GHz fl MHz.
9.
On the HP 8560A, press
Repeat steps 6 through 9 until both of these interacting adjustments meet their
10.
tolerances.
11. Place the jumper on A14523 in the NORM position (pins 1 and 2 jumpered).
12. Disconnect the SMA cable from the 1ST LO OUTPUT jack and reconnect the 500
termination on the 1ST LO OUTPUT.
2-38 Adjustment Procedures
YTO Main Coil Adjustments
LOCK HARMONIC 6 IHz)
)
18.8893 (GHz) (WSWP), then press
, then press (m) RECALL STATE STATE 0.
STATE 1.
STATE 0.