Product: 492 Ser.1
Date: 2-25-85
Change Reference: C102/285
2. Bias Adjustment
a. Adjust R1022 (see Fig.4-23B) for a reading of -0.25 on the
DM502.
b. Push FREQUENCY RANGE A to band 5 (15-21 GHz) , and adjust
R1026 (see Fig.4-23B)for a reading of -0.25 on the DM502.
3. Start Spurious Amplitude and Band 1 Bias Adjustment.
a. Push FREQUENCY RANGE ψ to band 1 (0-4.2 GHz) , and adjust
the CENTER FREQUENCY to 0 MHz.
b. Connect a 50 ohm cable from the SG503 Output to the 2701
Port 1/Input, and connect a second 50 ohm cable to the Power Sensor.
NOTE
Calibrate the Power Meter before making measurements.
c. Set front-panel controls as follows:
2701
SG503
Frequency Range
Frequency Variable
Output Amplitude
Power Meter
Line
Range
O 0, DC
1-2.5
for an indication of 2.00 MHz on the readout
Amplitude Multiplier xl
counterclockwise
on
O (on the dBm scale)
d. Adjust the SG503 Output Amp control for an indication of O on
the Power Meter dBm scale.
e. Disconnect the Power Meter from the 50 ohm cable and connect the
50 ohm cable from the 2701 Port 2/Output connector to the 492 RF INPUT
connector.
f. While keeping the 2 MHz signal centered with the CENTER FREQUENCY
control, set the 492 FREQUENCY SPAN/DIV to 200 kHz.
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