Amplitude; Harmonics,3320B; Leveling,3320B - HP 3320A Operating And Service Manual

Model 3320A!B ADJUSTMENT PROCEDURES
Section V
k. Adjust AI2BR30 (+ 5 V ADJ) for 5.000V ac
±
0.001 V ac (4.8646 V ac
±
0.0012 V ac, Option 001)
indication on the ac voltmeter. If AI2BR30 does not have
enough range remove AIBAR2 (thermocouple), rotate it
180
0
,
and replace it back on the AI2B assembly. Repeat
adjustment of A12BR30.
e. Connect the ac voltmeter through a 50 ohm load (75
ohm load, Option 001) to the 3320A front panel output
jack.
f. Adjust A9AR52 (AMPLITUDE ADJUST) for
1.000 V ac
±
0.1 V ac indication on the ac voltmeter.
l. Set
the 3320B AMPLITUDE to
+
17.00 dBm
(+ 15.00 dBm, Option 001) and adjust A12BR34 (1.583 V
ADJ) for 1.583 V ac
±
0.001 V ac (1.540 V ac
±
0.002 V
ac, Option 001) indication on the ac voltmeter.
3320A:
5-43. Harmonies, 33208.
544. This adjustment procedure sets the harmonic level of
the 3320B output signal to a minimum.
a. Connect the spectrum analyzer through the 355D
(set to 40 dB) attenuator to the 3320B front panel output
jack.
a. Connect the de voltmeter to the 3320A front panel
output jack. Set the 3320A AMPLITUDE Full C W.
b. Set the 3320B FREQUENCY to 12.99, RANGE to
10 MHz, AMPLITUDE to + 26.99 dBm (+ 24.99 dBm,
Option 001), and LEVELING to ON (> 10 Hz).
b. Remove the brown cable from the input of the A12A
assembly. Connect a jumper cable between AI2A 11 and
ground.
c. Adjust AI2ARII (DC OFFSET) for 0 V de
±
2 mV
de indication on the de voltmeter.
c. Adjust AI4R55 (BIAS ADJUST) until the third
harmonic of the 12.99 MHz signal is approximately 42 dB
below the 12.99 MHz funuamental on the spectrum
analyzer display.
5-45. Leveling, 33208.
d. Remove the shorting cable from A12A 11 and
replace the brown cable. Adjust AIOR45 (DC OFFSET) for
a 0 V de ± 2 mV de indication on the de voltmeter.
546. This adjustment procedure sets the 3320B output
signal for equal ae levels when switching from LEVELING
OFF to LEVELING ON (> 10Hz).
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5-13