Tektronix RSA3408B, Service Manual

Page: 102 / 250

Adjustment Procedures
4- 12
RSA3408B Analyzer Service Manual
4. Calibrate the power sensor:
a. Modify the hookup: Connect the power sensor input to the power
reference output of the power meter (see Figure 4--5).
Power reference output
Power meter
Figure 4- 5: Hookup for calibrating the power sensor
b. Press the Sensor Cal side key to perform zero adjustment and calibra-
tion for the sensor.
5.
Perform the flatness measurement for the generator:
a.
Modify the hookup:
Connect the signal generator output through an N-N
coaxial cable followed by a 10 dB attenuator and an N adapter to the
power sensor input. See Figure 4--4 on page 4--10 again.
b. Insert a floppy disk to the disk drive of the analyzer for storing the
flatness data.
c. Press the Measurement side key to perform the flatness measurement.
When the measurement has been completed, the flatness data is saved to the
file(s) on the floppy disk:
sgrf1flatness.cal (for the Band setting of 230 and Low)
sgrf2flatness.cal (for the Band setting of High)
sgrf3flatness.cal (for the Band setting of High)
6. Disconnect the hookup:
a. Remove the floppy disk by pressing the eject button.
b. Turn off the signal generator, power meter, and analyzer.
c. Disconnect the GPIB cables.
d. Disconnect the power sensor and the N-N cable.