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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