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Mode1209A
Section V
hp209A
AC VOLTMETER
OSCILLATOR
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a. Connect the Model 209A sine wave output
with a 600 ohm load to the Distortion
Analyzer.
5-8. DISTORTION CHECK.
Figure 5-3. 2 MHz Distortion Check
h. Repeat steps a through f of this paragraph
for all frequencies listed in Table 54.
i. Connect the equipment as shown in Figure
5-3.
b. Set the Model 209A controls as follows:
Dial
.10
RANGE
X100
Amplitude
Full CW
NORM/LOW DIST
NORM
c. Set the Distortion Analyzer controls as
follows:
Dial
10
FREQUENCY RANGE
X100
METER RANGE
0 dB
FUNCTION
SET LEVEL
SENSITIVITY
MIN
MODE
MANUAL
d. Inc rease
the
Distortion
Analyzer
SENSITIVITY to obtain a 0 dB indication
on the meter.
e. Switch the Distortion Analyzer FUNCTION
to DISTORTION, and adjust the Distortion
Analyzer dial and BALANCE controls for a
null indication on the meter.
f. When an approximate null has been obtained
with the Distortion Analyzer dial and
BALANCE controls, switch the MODE to
AUTOMATIC
for
minimum
meter
indication.
g. Meter indication should be greater than 60
dB down from the 0 dB reference.
j. Set the Model 209A frequency dial to 20
and the RANGE switch to X1K. Adjust the
sine wave amplitude control for a 0 dB
indication on the AC Voltmeter.
k. Switch to the X100K RANGE, and adjust
the frequency dial and notch filter control
for a minimum indication on the AC
Voltmeter.
1. The meter indication should be greater than
40 dB down from the 0 dB reference.
Table 5-4. Distortion Check
Frequency
Tolerance
Dial
RANGE
LOW
Setting
Setting
NORM
DIST.
2.5
X2
-40 dB
-54 dB
10
X2
-40 dB
-54 dB
2
X10
40 dB
-54 dB
10
X10
-54 dB
2
X100
-60 dB
10
X100
-60 dB
2
X1K
-60 dB
10
X1K
-60 dB
2
X10K
-60 dB
10
X10K
-60 dB
2
X100K
-60 dB
6
X100K
-50 dB
5·3
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