Rohde & Schwarz R&S SMU200A, Service Manual

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R&S SMU200A Test Procedures
1007.9845.82 1.9
E-12
Test Procedures
Reference Frequency
Output of Internal Reference
Important: Allow the DUT to warm up for at least 2 hours before the measurement.
Test equipment
-
RF power meter (Table 1-2, item 8)
-
Frequency counter (Table 1-1, item 1)
Test setup Connect an RF power meter to the REF OUT output (on rear panel).
Measurement
Measure the output level. It should be within
±
3 dB of the data
sheet specifications.
Test setup Connect a calibrated frequency counter to the REF OUT output (on
rear panel).
Measurement Measure the frequency.
The frequency deviation must not exceed the sum of deviations
resulting from the frequency error in the rated temperature range
and from aging.
Input for External Reference
Test equipment
-
Frequency counter (Table 1-2, item 1)
-
Signal generator (Table 1-1, item 5)
Test setup Connect the signal generator to the REF IN input for the external
reference (on rear panel) and connect a calibrated frequency counter
to the RF output.
Measurement
Measure the frequency with the setting
Reference Oscillator Settings/Source External.
The pull-in range has to be tested only at 10 MHz input
frequency by measuring the output frequency (e.g. at 1 GHz).
There must be no relative frequency error and no error message.
At the other input frequencies, a function test at nominal
frequency is sufficient. The level of the signal generator has to be
varied over the specified range.