593
Chapter 14, Diagnostics Descriptions
Description of RF Diagnostics (RFDIAGS3)
N:\mkt\MANUALS\HP8924C\ALR\diagnos.fb
RF Input Signal
The internal calibration signal is disabled and the
input signal path from the Receiver is enabled. The
signal generator’s synthesizer and the RF analyzer are
set to 100 MHz. This provides an IF of 114.3 MHz at
the input to the spectrum analyzer. The level is set so
that the level at the RF IN/OUT connector is equiva-
lent to
−
120 dB at the ANT IN connector. This
should produce a DVM reading of 1.892 Vdc from the
spectrum analyzer’s detector. Limits of
±
0.200 V are
used which is equivalent to approximately a 10 dB
variation in signal level. For newer Test Sets, addi-
tional measurements are made by setting a reference
level then dropping the level 10, 2, and 1 dB with the
vertical sensitivity set to 10, 2, and 1 dB/division
respectively.
DVM:SCOPE2
Table 127
A32 Spectrum Analyzer Tests (Continued)
Measurement
Explanation and Suggestions
Measurement Point
Содержание 8924E
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Страница 522: ...522 Chapter 11 Block Diagrams Assembly Details N mkt MANUALS HP8924C ALR blkdia fb ...
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