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YTO Main Coil Span Problems (LO Spans
>20
MHz)
..........
YTO FM Coil Span Problems (LO Spans 2.01 MHz to 20 MHz)
.....
Fractional N Span Problems (LO Spans
12
MHz) ............
First LO Span Problems (All Spans) .................
First LO Span Problems (Multiband Sweeps)
..............
Phase Noise Problems
.........................
Phase Noise in Locked versus Unlocked Spans
.............
Reference versus Reference PLL Phase Noise
..............
Fractional N versus Offset PLL or YTO PLL Phase Noise ........
Fractional N PLL Phase Noise
....................
Sampler and Sampler IF
........................
Sweep Generator Circuit
........................
A21 OCXO
.............................
12. RF Section
Troubleshooting Using the TAM
....................
Low Band Problems
..........................
High Band Problems
.........................
Low and High Band Problems
.....................
A7 LO Distribution Amplifier
.....................
A8 Low Band Mixer
..........................
A9 Input Attenuator
.........................
Al3 Second Converter
.........................
Al4 Frequency Control Assembly
....................
LODA Drive
.............................
Control Latch for Band-Switch Driver .................
YTF Driver Circuit
.........................
Al5 RF Assembly
...........................
Confirming a Faulty Third Converter .................
Confirming Third Converter Output
..................
Third Converter
..........................
Flatness Compensation Control
....................
Control Latches
...........................
SIG ID Oscillator (Option 008)
....................
10 MHz Reference
..........................
13. Display/Power Supply Section
Troubleshooting Using the TAM
....................
Blank Display (Using the TAM)
...................
Blank Display
............................
Blanking Signal
............................
Display Distortion
..........................
Focus Problems
............................
Intensity Problems
..........................
A6 Power Supply Assembly Troubleshooting ...............
Dead Power Supply
.........................
Check the Supply Voltages
......................
Kick-start/Bias
...........................
Buck Regulator
...........................
Line Fuse Blowing
.........................
Supply Restarting Every 1.5 Seconds (Kick Start)
............
11-38
11-38
1 l-39
11-40
11-41
11-43
1 l-43
11-43
1 l-44
11-44
1 l-45
11-46
11-50
12-2
12-4
12-5
12-5
12-6
12-7
12-8
12-9
12-11
12-11
12-12
12-13
12-16
12-16
12-16
12-17
12-18
12-18
12-19
12-20
13-4
13-5
13-6
13-7
13-8
13-9
13-10
13-12
13-12
13-12
13-13
13-13
13-14
13-14
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