Chapter 3 97
Manual Adjustment Procedures
Introduction
A5T200 XTAL CTR 1 3 Adjusts center frequency of first stage of crystal
bandwidth filter to 10.7 MHz.
A5T202 XTAL CTR 2 3 Adjusts center frequency of second stage of crystal
bandwidth filter to 10.7 MHz.
A5T500 XTAL CTR 3 3 Adjusts center frequency of third stage of crystal
bandwidth filter to 10.7 MHz.
A5T502 XTAL CTR 4 3 Adjusts center frequency of fourth stage of crystal
bandwidth filter to 10.7 MHz.
A14R42 6.01 GHz 7 Adjusts the main coil tune driver current at a YT
O
frequency of 6.01 GHz (near the upper YTO
frequency limit).
A14R76 FM SPAN 7 Adjusts the FM span accuracy by affecting the
sensitivity of the FM coil driver.
A14R93 3.2 GHz 7 Adjusts the main coil fixed driver current at a YTO
frequency of 3.2 GHz (near the lower
YTO
frequency limit).
A15C100 SMPL MATCH 6 Transforms the sampler input impedance to
50 ohms over the 285 to 297.2 MHz range.
A15C210 VCO RANGE 6 Adjusts the VCO tank capacitance so that 21V on
the VCO tune line equals 298 MHz VCO frequency.
A15C629 SIG ID 19 Fine adjusts the 298 MHz SIG ID oscillator
frequency to optimize its performance.
A15U302 10 MHz ADJ 15 Adjusts frequency of the temperature compensated
crystal oscillator (TCXO) to 10 MHz.
A15R561 CAL AMPTD 13 Adjusts amplitude of the 300 MHz calibrator signal
to −10.0 dBm.
A15R926 EXT BIAS
ZERO
17 Adjusts zero bias point of external mixer bias.
Table 3-2 Adjustable Components
Reference
Designator
Adjustment
Name
Adjustment
Number
Description
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