a. The first measurement we will cover is the transfer calibration of a
thermistor mount. For signal source operation consult ORD Subcourse 471.
(1) Connect equipment according to Figures 7, 8, or 9 as applicable to
the specific frequency required. Figure 7 covers the frequency range of 1.0 to
8.0 GHz, Figure 8 covers 8.0 to 12.4 GHz and Figure 9 from 12.4 to 40.0 GHz.
Throughout this lesson when the term "applicable frequency" is used,
it means those frequencies within the range of the test item (TI).
Normally it is only necessary to check a thermistor mount at a
frequency near the high end, center and low end of its frequency range
unless certification at specific frequencies is requested. TI's which
have been repaired should be checked at all traceable frequencies
within their range limits.
(2) Adjust the signal source (A7) for a frequency near the low end of
the item's response range.