5-14.
UNLEVELED RF OUTPUT ADJUSTMENTS (Cont’d)
Equipment
Oscilloscope
HP 1741A
10:1
Divider
Probe
HP 100040
Digital Voltmeter (DVM)
HP 3456A
Power
Meter
HP 436A
Power Sensor
HP 8485A
Detector
HP 8473C
Adapters:
APC 3.5 (f)
to APC
3.5 (f)
HP P/N 5061 -5311
(required if OUT is an HP 8340B)
APC 3.5 (f)
—
Type N
(in)
HP P/N 1250-1744
(required if OUT is an HP 8341 B)
Dual Banana to BNC (f)
HP P/N 1251-2277
NOTE
The following adjustments should be checked or adjusted before mak-
ing the adjustments in this procedure: Power Supplies, 20/30 Loop, M/N
Loop, Pretune, and Sweep Time.
Procedure
1.
Place the OUT in the
test position and connect the oscilloscope and detector as shown in Figure
5-40. Connect the DVM to the OUT’s rear panel 0.5 V/GHz output BNC. Switch the OUT’s LINE
switch ON and allow the equipment to warm
up for one half hour.
INITIAL SETTINGS
NOTE
Once these initial settings have been made, it will be necessary to com-
plete this procedure and the Leveled RF Output adjustments
2.
Access the OUT’s Calibration Constants by pressing the following key sequence:
[INSTRPRESET]
[SHIFT][GHz][2] [Hz]
[SHIFT][MHz] [1] [2] [Hz]
[SHIFT][kHz] [2] [2] [Hz]
Preset
Cal Constant number
2 to 100 by entering [1]
[0][0]
[Hz].
NOTE
After initially accessing the Cal Constants, subsequent entry into the Cal
Constant mode may be accomplished by pressing; [SHIFT] [GHz]
[desiredCal Constant] [Hz][SHIFT][ENTRYOFF]. However, after press-
ing [INSTR PRESET], the full Cal Constant key sequence must be
entered (see above).
5-72
Adjustments
HP 8340B/41B