582 Chapter11
RF Section
Introduction
Introduction
The RF section converts the input signal to a 10.7 MHz IF
(Intermediate Frequency). See Figure 11-5 on page 615 for a detailed
block diagram.
NOTE The block diagrams for the A14 and A15 assemblies are located in
Chapter 10, "Synthesizer Section."
Troubleshooting Using the TAM........................................ page 584
Low Band Problems (30 Hz to 2.9 GHz) ............................ page 587
Low Band Problems............................................................ page 588
A7 LODA (LO Distribution Amplifier)............................... page 589
A8 Low Band Mixer ............................................................ page 591
A9 Input Attenuator ........................................................... page 592
A13 Second Converter......................................................... page 594
A14 Frequency Control Assembly...................................... page 596
A7 LODA Drive................................................................. page 596
A15 RF Assembly................................................................ page 598
Confirming a Faulty Third Converter.............................. page 598
Confirming a Third Converter Output............................. page 598
Third Converter................................................................. page 599
Flatness Compensation Control....................................... page 600
Control Latches................................................................ page 601
SIG ID Oscillator (Option 008)......................................... page 602
10 MHz Reference............................................................. page 603
A10 Tracking Generator (Option 002) ............................... page 607
Block Diagram Description............................................... page 607
Output Goes Unleveled (ERR 900 or ERR 901) .............. page 608
Excessive Residual FM..................................................... page 610
Flatness Out-of-Tolerance ................................................ page 610
Vernier Accuracy Out-of-Tolerance.................................. page 611
Harmonic/Spurious Outputs Too High ............................ page 612
Power Sweep Not Functioning Properly.......................... page 613
No Power Output............................................................... page 613
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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