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Performance Tests
RF level Accuracy Performance Test
RF level Accuracy Performance Test
NOTE This performance test is an adequate substitute for the automated Power
Level Accuracy performance test. If the preferred Power Level Accuracy
performance test is performed, this performance test is not required.
Description
This power accuracy verification procedure directly measures the full performance of the
8648A.
For the 8648B/C/D, direct measurements can only be made over the full dynamic range up
to 1300 MHz. The measuring receiver verifies the operation of the ALC and step
attenuator over its full dynamic range, 13 dBm to −127 dBm for frequencies less than
1300 MHz.
Two power meters are used to verify operation at frequencies greater than 1300 MHz down
to −60 dBm.
Historically, testing of the 8648B/C/D demonstrates that low-level performance at
frequencies less than 1300 MHz is indicative of low-level performance at greater than
1300 MHz.
Connect the Test Equipment
Figure 8-16. Equipment Setup for 8648A and 8648B/C/D ≤ 1300 MHz
Configure the Measuring Receiver
1. Reset
2. RF power mode (tuned RF level mode for levels lower than −10 dBm)
3. Connect the measuring receiver and 8648 timebases.
4. Set to measure in dBm; press
LOG/LIN.
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