19
1145A 2-Channel Active Probe
Bandwidth
1
Zero and calibrate the power meters with the power sensors.
2
Connect the equipment as in the drawing below.
3
Connect the probe power input to the oscilloscope or 1142A
4
Set the signal generator for 50 MHz at 0.0 dBm.
5
Set the power meter calibration factors to the 50 MHz value on the
power sensors.
6
Adjust the signal generator power output for exactly -6.0 dBm as read
on the input power meter.
7
Note the power level reading on the output power meter.
50 MHz power level _____________ dBm.
8
Change the signal generator frequency to 750 MHz.
9
Set the power meter calibrating factors to the 750 MHz value on the
power sensors.
10
Relevel the signal generator output power for a -6.0 dBm reading on the
input power meter.
11
Note the power level reading on the output power meter.
750 MHz power level _____________ dBm.
12
Subtract the reading in step 7 from the reading in step 11.
The difference should be
≤
3.0 dB.