Giga-tronics 8650A Series, Руководство по эксплуатации

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Front Panel Operation
Manual 31470, Rev. E, April 2001 2-39
2.3.18 Peak Power Measurements
Peak power sensors directly measure the amplitude of pulsed microwave signals. The direct sampling
technique is more accurate than traditional duty cycle correction methods. The sample position can be
displayed on an oscilloscope.
1. Calibrate a peak power sensor and connect it to a pulsed microwave source.
2. From the Main Menu, press [ Sensor Setup ]. From the Sensor Setup menu, select the Peak sensor
with the cursor keys.
3. Press [ Config ] to display the Setup mode menu and select [ Peak ].
4. Select the desired trigger level (for internal or external triggering).
5. Select the desired sample delay (for internal or external triggering).
6. Optionally, set the desired delay offset (for internal or external triggering).
7. Connect the peak power sensor’s Detector Out to an oscilloscope to view the sample position. For
80350A Peak Power Sensors, also connect the sensor’s Sample Delay output to the oscilloscope and
trigger on that channel.
2.3.19 Measuring an Attenuator (Single Channel Method)
Attenuators are useful for many applications. With the 8650A, attenuators can be calibrated quickly
and accurately. The single channel calibration procedure outlined below is efficient for calibrating at a
single frequency or at a limited number of frequencies.
1. Connect the power sensor to the signal source through a 6 dB attenuator (a matching pad) and
adjust the source output power to about 0 dBm. Verify that the source output is stable.
2. Press
[FREQ]
and enter the operating frequency (this step is optional).
3. From the Main menu, press [ Rel ] to set the reference level.
4. Insert the attenuator to be calibrated between the matching pad and the power sensor.
5. Record the attenuator value.