Performance ver
ification
External reference input, functional test
This check is a functional check. It is an important check for customer use, but does not check warranted specification limits.
1. Connect a signal generator RF output to the N-connector Ref input of the RSA306B, as shown. The signal generator
accuracy must be better than ±0.05 ppm. If it does not, it must have its frequency reference phase locked to a precision
frequency reference.
Note: The Stanford Research Systems SG386 signal generator has adequate frequency stability without use of an
external timebase, but only if it has been calibrated/verified within 1 year. If this is not the case, the signal generator must
have an accurate external timebase connected to its timebase input (10 MHz).
2. Set the signal generator controls:
a. Frequency = 10 MHz
b. Amplitude = 0dBm
3. Set the RSA306B to use the external reference (Setup > Acquire > Frequency Reference).
4. Under the source field, select the External (10 MHz) radio button.
5. Check that the Status Bar shows Ref: Ext. This generally occurs within 5 seconds.
6. Enter pass/fail result in the test record.
RSA306B Specifications and Performance Verification 17
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