594 Chapter12
RF Section
Introduction
Introduction
The RF Section converts the input signal to a 10.7 MHz IF
(Intermediate Frequency). See Figure 12-11 on page 631 for a detailed
block diagram.
NOTE The block diagrams for the A14 and A15 assemblies are located in
Chapter 11, Synthesizer Section.
Page
Troubleshooting Using the Diagnostic Software .........page 595
Low Band Problems ......................................................page 599
High Band Problems .....................................................page 600
Low and High Band Problems ......................................page 601
A7 LO Multiplier and Distribution Amplifier .............page 602
A8 Low Band Mixer ......................................................page 604
A9 Input Attenuator .....................................................page 605
A10 YIG-Tuned Filter/Mixer (RYTHM) .......................page 608
A12 Switched Barium-Tuned Mixer (SBTX) ...............page 609
A13 Second Converter ...................................................page 610
A14 Frequency Control Assembly ................................page 612
LO Multiplier/Amplifier Drive ...................................page 612
Control Latch for Band-Switch Drivers .....................page 615
YTF Driver Circuit ......................................................page 615
A15 RF Assembly ..........................................................page 621
Confirming a Faulty Third Converter ....................... page 621
Confirming Third Converter Output ..........................page 621
Third Converter ...........................................................page 622
Flatness Compensation Control .................................page 624
PIN Switch Drivers .................................................... page 624
SIG ID Oscillator (Option 008) ...................................page 625
10 MHz Reference ...................................................... page 626
CAUTION All of the RF assemblies are extremely sensitive to Electrostatic
Discharge (ESD). For further information regarding electrostatic
cautions, refer to “Electrostatic Discharge” in Chapter 1 .
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