HP 8672S Operating And Service Manual page 37

Performance Tests
Models 8672S/86720A
4-7. SIGNAL GENERATOR SYSTEM OPERATIONAL VERIFICATION TEST
Equipment
Frequency Counter. HP 5343A
Power Meter .HP 436A
Power Sensor .HP 8481A
Spectrum Analyzer.
.
.HP 8565A
Diode Detector.HP 8472B
. . Oscilloscope.HP 1715A
Pulse Generator.HP 8013B
FREQUENCY
COUNTER TIM6
[BASE
NPUT
SIGNAL GENERATOR
SYSTEM
tO MHz
50A
INPUT
® O OO 0
aaoa a
o s
® 1.
9
.
a □ o □ |
J___L.
RF
[OUTPUT
(STEP 5)
POWER
METER
Apower
USENSOR
i
J
Figure 4-1. Frequency Range and Power Test Setup
Procedure Frequency Check
1. Attach the Signal Generator's 10 MHz rear panel output to frequency counter time
base input and select external time base for the counter. See Figure 4-1.
2. Attach frequency counter to the .01 TO 18.0 GHz OUTPUT connector of the FEU.
Set frequency to 10 MHz on the Signal Generator. The frequency counter should
read 10 MHz within the resolution of the counter.
3. Tune in 100 MHz steps from 100 MHz to 1.9 GHz while observing the actual output
frequency on the counter. Accuracy matching the resolution of the counter should
be maintained over the entire range.
4. Tune in 1 GHz steps from 2 to 18 GHz while observing the actual output frequency
on the counter. Accuracy matching the resolution of the counter should be main¬
tained over the entire range.
Power Check
5. Zero and calibrate the power meter. Set the cal-factor control as indicated on the
power sensor for 10 MHz. Disconnect the counter and connect the power meter and
sensor in its place. Set the Signal Generator System to 10 MHz at +13 dBm — that
is, +10 dBm on the Signal Generator and +3 dB on the FEU. The power meter
should read 13 ± 2.25 dBm.
6. Tune frequency from 100 MHz to 1.9 GHz in 100 MHz steps. If necessary reset the
FEU VERNIER control to maintain a front panel meter reading of + 13 dBm. The
power meter reading should remain within 13 ± 2.25 dBm over the entire range.
7. Vary the FEU VERNIER control over the range of+3 to -10 dBm. The power meter
reading should remain within + 2.25 dBm of the power reading on the FEU meter.
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