HP 8340B Manual page 269

5-13.
SWEEP GENERATOR, ASS
(Cont'd)
RESET ERROR ADJUSTMENT
6. Connect the oscilloscope to
A58TP14 (ERROR).
7.
Press [INSTR
PRESET]
on the DUT.
8.
Adjust A58R1 (RESET, Figure 5-37) for
as close as
possible
to zero
Volt average on the
oscilloscope. (See Figure 5-39.)
Figure 5-39.
Reset Pulse Adjusted to Zero Volt Average
SWEEP GAIN ADJUSTMENT
9.
Connect the DVM to A58TP4 (MKR RMP)
and connect the
DVM
ground to
A58TP9
(RGND).
10.
Set the DUT
controls as follows:
a.
Press
[INSTR PRESET]
b.
Press [START FREQ] then enter
[2]
[.] [3]
[GHz]
c.
Press
[STOP FREQ]
then enter
[7] [GHz]
d.
Press [SHIFT]
[MHz] [2] [3] [Hz] [SHIFT] [kHz] [0] [Hz]
to stop the
sweep
at the end of
sweep (7 GHz).
11.
Record the reading at on the DVM.
12.
Connect the DVM to A58TP10 (VSWP).
13.
Adjust A58R13 (SWP GAIN) control so that the
DVM reading at A58TP10
=
94%
of reading at
A58TP4
taken
in
step
11.
EXAMPLE:
a.
DVM
reading
in
step
11
at
A58TP4
=
9.9884
Volts
b.
(0.94) (9.9884V)
=
9.38909 Volts
c.
Adjust A58R13 for
DVM reading
at A58TP10 of
9.38909
Volts.
14.
Turn the DUT's LINE switch
to
STANDBY. Remove the extender board from
the
A58 assembly
and re-install A58.
HP 8340B/41B
Adjustments