HP 8340B Manual page 247

5-8.
YO LOOP ADJUSTMENTS (Cont'd)
IF
GAIN ADJUSTMENT
8.
Verify that the
50 Ohm
load is still connected to
W38 at the end that
was connected
to A49J2.
Disconnect the oscilloscope probe from A48TP1.
9.
Connect the Spectrum Analyzer to A48J1.
10.
Set the
DUT
as follows:
a.
Press
[INSTR PRESET]
b.
Press
[CW]
then enter
[4] [.] [5] [GHz]
c.
Connect
a
jumper between A59TP4
and
A59TP5.
(This disables the UNLK annunciator
cir¬
cuit.)
11. Set the Sweep Generator
as
follows;
a.
Press
[INSTR PRESEST]
b.
Press
[POWER LEVEL]
then
enter [3] [dBm]
c.
Press
[CW]
then
enter [1] [8] [6] [MHz]
d.
Press
[SHIFT]
then [CW]; press [STEP] keys
to select
1
kHz
resolution.
BOTTOM VIEW
A48
^
00
[J
^
\
.
A48
R22
YO LOOP
(Selected Value)
SAMPLER
C22
(Selected Value)
IMPEDANCE
MATCH
Figure 5-19. Location
of
YO
Loop Adjustments
HP 8340B/41B
Adjustments