AR 10036390, Operating And Service Manual

Page: 30 / 56

Model 800A3B
Rev D 14
2.5 AMPLIFIER OPERATION
2.5.1 Typical Setup
This section describes how the amplifier would be set up and calibrated. For a block diagram of a typical
setup, see Figure 2-4, Typical Setup .
RF
Sweep Generator
800W
Amplifier Under
Test
RF Power
Meter
System Load
RF
Out
RF
In
RF
Out
RF
In
RF
Out
RF
In
RF
In
Attenuator
30dB
1kW
Attenuator
20dB
5W
Figure 2-4. Typical Setup
2.5.1.1 Preliminary Settings
RF GAIN: 0%
POWER: ON
2.5.1.2 Calibration
Set the RF generator output power to approximately 0 dBm (1mW CW). Place the unit in the RF ON mode
(by pressing the RF ON/OFF button). Adjust the manual gain control for the desired signal output level, as
measured on the RF wattmeter. You are now calibrated for a given output power from the Model 800A3B.
Place the amplifier in the Standby mode (by pressing the RF ON/OFF button).
CAUTION:
Do not connect or disconnect any loads or cables from the amplifier’s RF
Output when the amplifier is in the Operate mode. Dangerous voltages
that could cause serious injury to the user exist at the RF Output when the
amplifier is under power.
2.5.1.3 Connecting the RF Load
You may now disconnect the amplifier RF output from the attenuator and connect it to the test load (dotted
line). After the load has been connected to the Model 800A3B, the amplifier can now be placed in the RF ON
mode by pressing the RF ON/OFF button.