Output Standing Wave Ratio (Swr) Test; Description; Required Test Equipment - Keysight N432A Service Manual

3 Performance Tests

Output Standing Wave Ratio (SWR) Test

Description

Connector mismatch is the largest single contributor to measurement uncertainty,
so this specification must be warranted to provide assurance of instrument
accuracy. The 1 mW power reference level test must be carried out prior to this
test, as the voltage standing wave ratio VSWR specification is only valid at 1 mW.
This test measures VSWR by equating relative powers (measured by the test
system power meter and its sensors) when the power reference is exercised under
different load conditions.

Required test equipment

– 1 unit of network analyzer (8753ES/ET or equivalent, as long as it can measure
– 1 unit of calibration kit (85032B or equivalent that fits the network analyzer
– 1 unit of dual-channel power meter (E4419B or E4417A or equivalent)
– 2 units of 8481D power sensor
– 2 units of 11667A option 001 power splitter
– 1 unit of 20 dB attenuator (8491A or equivalent)
– 1 unit of 30 dB attenuator (11708A or equivalent)
– The above specified power sensors and power splitters models must be used.
NOTE
– Any type of attenuator can be used (as long as there are no additional mating
– 1 unit of 11667A, 1 unit of 8481D, and the 30 dB attenuator combine to
– 1 unit of 11667A, 1 unit of 8481D, and the 20 dB attenuator combine to
42
S11 in the 45 - 55 MHz range)
connector type)
connections, or differing attenuator values).
create the "Calibration System".
create the "Measurement System".
Keysight N432A Service Guide