Keysight M9360A, Руководство по обслуживанию

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Performance Verification Tests
Performance Verification Tests
The performance verification tests are designed to provide the highest level of confidence that the module being
tested conforms to published, factory-set
specifications . The tests are designed to test a module operating within
the temperature range defined by the module specifications. If the module is unable to pass any of the performance
tests, you may need to exchange the defective module for a new one – see
Module Core Replacement (page 37 ).
Use the provided Test Record Card (page 41 ) to record your findings.
Before attempting to conduct performance tests with the Agilent M9360A, make sure you have fol-
lowed the necessary startup instructions (see " Getting Started " on page 9 ).
Performance verification tests:
l
Insertion Loss above 10 MHz (page 23 )
l
Insertion Loss below 10 MHz (page 29 )
l
YTF 3 dB Bandwidth Test (page 32 )
Insertion Loss above 10 MHz
Test Method
This test measures the insertion loss (above 10 MHz) from the M9360A RF IN port to the RF 1 OUT port. This
test also measures the insertion loss (above 10 MHz) from the RF IN port to the RF 2 OUT port through the prese-
lector bypass path as well as the YTF path (for reference on paths, see "
Block Diagram " on page 18 ). This test
also measures the insertion loss (above 10 MHz) from the LO IN port to the LO 1 OUT and LO 2 OUT ports.
Limitations and Considerations
Limitations
This measurement cannot be easily made with a signal generator and power meters/sensors due to the proximity of
connectors on the M9360A. The use of right-angle SMA adaptors are necessary for feasible connections and may
degrade the signal enough to make it immeasurable at higher frequencies. Test times will become very large if sen-
sor/adaptor characterizations are needed; therefore, it is clear that a network analyzer best fits the needs of this
measurement.
Methodology
This measurement is made using a vector network analyzer (VNA). The methodology was selected when con-
sidering the test time as well as the connections necessary. It is assumed that this measurement is performed man-
ually. The use of a VNA allows for swept measurements as well as direct measurement on the input and output
ports without the need for adaptors. The VNA cannot measure the full frequency range of the M9360A module;
therefore, frequencies below 10 MHz are made using an RF signal source and power meter in a procedure that is
documented separately (see "
Insertion Loss below 10 MHz " on page 29 ).
Agilent M9360A PXI Attenuator/Preselector Service Guide 23