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.
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
R
termination from the first LO OUTPUT. Connect the equipment as
shown in Figure 2-13. Press
luNE)
to turn the spectrum analyzer on.
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.
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)
07
SAVE
SAVE STATE, STATE
0
[@EZEkV),
35.7493
GHz
07
SAVE
SAVE STATE, STATE 1
[RECALL),
RECALL STATE, STATE 0.
On the HP 5343A, press
[SHIFT)
7 and set the controls as follows:
Sample rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully counterclockwise
10 Hz-500 MHz/500 MHz-26.5 GHz switch . . . . . . . . . . 500 MHz-26.5 GHz
Adjust A14R93 3.2 GHz for the appropriate frequency counter reading of 3.200 GHz
fl
MHz.
On the spectrum analyzer, press STATE
1
.
Adjust A14R42 6.01 GHz for a frequency counter reading of 6.010 GHz
&l
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