HP 8340B Manual page 327
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- Manual (530 pages) ,
- Operating instructions manual (119 pages) ,
- Operating manual (14 pages)
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5-19.
EXTERNAL MODULE LEVELING ADJUSTMENT (Cont'd)
Procedure
1.
Connect
the
equipment
as shown
in
Figure 5-70. Turn the
DUT's LINE
switch
ON
and allow 30
minutes for the
equipment
to
warm
up.
2.
On the DUT, press
[INSTR PRESET] [CW] [4] [GHz] [AM] [SHIFT] [XTAL] [0] [dBm]
to turn
AM
on and to set the
DUT
to external module power
leveling
of
0
dBm. Press
[SHIFT] [GHz] [3] [5]
[Hz] [SHIFT] [MHz]
[1] [2] [Hz]
[SHIFT] [kHz] [2] [2] [Hz]
to access Cal
Constant
35.
NOTE
If,
in
step
3,
Cal Constant 35
is
adjusted
for
a
negative voltage reading on
the DVM
(i.e.,
-0.002V),
it
is
possible that the DUT's
OVERMOD
annun¬
ciator will turn on.
If this
occurs, rotate the DUT's rotary knob to turn the
OVERMOD annunciator OFF and then adjust
the
DVM
for the proper
volt¬
age reading.
3.
Using the
DUT's front
panel rotary knob, adjust Cal
Constant 35 (range
is
—100 to
+100)
until
the
DVM reads 0.000
V
±
2
mV.
4.
Using the
DUT's
[^]
step key, access Cal Constant
37. Using
the DUT's rotary knob, adjust Cal
Constant 37
(range
is
—100 to
+100)
until
the DUT's POWER dBm display indicates 0.0 dBm.
5.
On the DUT, press
[SHIFT] [XTAL] [1] [0] [dBm]
to
set the external module power to
+10
dBm.
Press
[SHIFT] [GHz] [3] [6] [Hz] [SHIFT] [ENTRY OFF]
to
access Cal Constant
36.
6.
Using the DUT's rotary knob, adjust Cal Constant 36 (range
is
—100 to
+100)
until
the
DVM
reads
0.3
V
±
2
mV.
7.
Using the
DUT's
[«]
step key, access Cal Constant 38. Using the
DUT's
rotary knob, adjust Cal
Constant 38 (range
is
-100
to
+100)
until
the DUT's POWER dBm display indicates 10.0 dBm.
8.
Repeat steps
2
through
8
to ensure that
the adjustments are within tolerance.
9.
On
the
DUT, press
[SHIFT] [MHz] [1] [4] [Hz] [SHIFT] [kHz] [5] [3] [4] [9] [Hz].
Wait for
"CALIBRATION STORED"
to be displayed
in
the
DUT's ENTRY DISPLAY
and then press
[INSTR
PRESET].
5-130
Adjustments
HP 8340B/41B
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