Chapter 2 55
Adjustment Procedures
Introduction
A5L702 LC CTR 4 3 Adjusts center frequency of fourth stage of LC bandwidth
filter to 10.7 MHz.
A5R343 15 DB ATT 4 Adjusts the attenuation of the Reference 15 dB
attenuator for 15 dB between minimum
and maximum attenuation.
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.
A6R410 HV ADJ 1 Adjusts the voltage between A6TP405 and A6TP401 to
the voltage marked on the A6A1
High Voltage Module.
A10R13 −10 dB ADJ 9 Offsets power level range of A10 Tracking
Generator.
A10R18 0 dB ADJ 9 Adjusts gain of power level range of A10
Tracking Generator.
A10C3 TRK OSC CTR 20 Centers range of the A10 Tracking Generator
tracking oscillator.
A14R42 6.01 GHz 7 Adjusts the main coil tune driver current at a
YTO 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 1 6 Transforms thesampler input impedance to50 ohms over
the 280 to 298 MHz range
A15C210 VCO RANGE 6 Adjusts the VCO tank capacitance so that 21 V on the
VCO tune line equals 298 MHz
VCO frequency.
A15C629 298 MHz ADJ 17 Fine adjusts the 298 MHz SIG ID Oscillator (Opt. 008)
frequency to optimize its performance.
A15U302 10 MHz ADJ 12 Adjusts frequency of the temperature
compensated crystal oscillator (TCXO) to 10 MHz.
A15R561 CAL AMPTD 11 Adjusts amplitude of the 300 MHz calibrator signal to
−10.0 dBm.
A15R926 EXT BIAS ZERO 14 Adjusts zero bias point of external mixer bias.
A17R4 Z GAIN 2 Adjusts maximum intensity.
A17R11 CUTOFF 2 Adjusts intensity to turn off blanked lines.
A17R21 Z FOCUS 2 Adjusts focus for lines of different brightness.
Table 2-2 Adjustable Components
Reference
Designator
Adjustment
Name
Adjustment
Number
Description
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