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To test bandwidth
This test checks the bandwidth of the probe. A high-frequency signal
generator and two power meters are used to set the input and measure the
output of the probe.
Specification: down less than 3 dB, dc to 2.5 GHz
Equipment Required
Equipment
Signal Generator
Power Meters (2)
or one Dual-
Channel
Power Sensor (2)
Power Splitter
Power Supply
Adapter/termination N(f)-to-probe, 50 Ω
Adapter
Adapter
1 Zero and calibrate the power meters with the power sensors.
2 Connect the equipment as in the figure on the next page.
3 Connect the probe power input connector to the 1143A or oscilloscope
probe power.
4 Set the probe offset to zero.
If using an 1143A power module, set Offset controls to Local and Zero.
If using an oscilloscope for probe power, use the channel menu to set the
offset to 0.0 V.
5 Set the signal generator for 50 MHz at 0.0 dBm.
6 Set the power meter calibration factors to the 50 MHz value on the
power sensors.
Critical Specifications
50 MHz to 2.5 GHz
50 MHz to 2.5 GHz,
±3% accuracy
50 MHz to 2.5 GHz, 300 mW
dc to 2.5 GHz, ≤0.2 dB output tracking,
Type-N
Power and control for probe under test
N(f-f), 50 Ω
N(m-m), 50 Ω
Chapter 3: Service
Calibration Testing Procedures
Recommended
Model/Part
8663A
436A (2),
437A (2), or
438A (1)
8482A
11667A
1143A
11880A
1250-0772
1250-0078
45
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