C H A P T E R 7 – T E S T S A N D T E S T C O N D I T I O N S
AT5600 User Manual 98-119 issue 14 Page 131
7.22. RESP – Frequency Response
Where Used
The frequency response test, RESP, may be used to check that the variation in
power loss of a telecommunications or audio transformer over a specified
frequency range is less than specified limits.
Measurement Conditions
The RESP test consists of many Insertion Loss (ILOS) tests repeated at different
frequencies.
The resistors shown are fitted to the test fixture and should be switched out of
circuit when making other measurements such as resistance and inductance.
This can be done by fitting relays to the fixture and switching them at appropriate
points in the test program using OUT tests.
The first ILOS test is made at a reference frequency that is usually near the
middle of the band of frequencies of interest. The result of this test is the 0dB
reference level. Further ILOS tests are then carried out at user selected
frequencies and the results referred to the reference dB level.
If all the referred ILOS results are at or inside the specified limits, the result of a
RESP test is the preferred ILOS result that is closest to the limit. If any of the
referred ILOS results are outside the specified limits, the RESP result is the
preferred ILOS result that is furthest away from the limit.
Please also see
14.6.18 for specific advice on programming the test, and
10.2.21 for test accuracy specification
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