HP 8648 A/B/C/D - Changpuak.ch

RF Level Accuracy
Performance Tkst
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 HP 8648A.
Connect the Test
Equipment
For the HP 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 HP 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.
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MEASURING RECEIVER
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UNDER TEST
SENSOR MODULE
Figure 8-16.
Equipment Setup for the BP 8648A and HP 8648BICID 5 1300
MHZ
Configure the 1. Reset
Measuring Receiver 2. RF power mode (tuned RF level mode for levels lower than
-10 dBm).
8-22 Performance Tests
3. Connect the measuring receiver and HP 8648 timebases.
4. Set to measure in dBm, press [LOG/LINJ
Note Enter the power sensor’s calibration data into the measuring receiver
and zero the sensor module. Refer to the measuring receiver’s
operating manual.