66 Chapter 2
Overall Troubleshooting
Troubleshooting Performance Test Failures
Spurious Responses None A19 RYTHM
FL1 (3 GHz LPF)
FL2 (3.9214 GHz BPF)
A20 Lowband
A10 3rd Converter
A8 Analog IF
Chapter 5
Chapter 3
Chapter 4
Chapter 6
Images and Spurious
Responses (Wide IF)
But not failing the
normal Spurious
Responses test
A31 Wideband Analog IF Chapter 8
Second Harmonic
Distortion
Lowband Mixer Bias A13 Front End Driver
A19 RYTHM
A20 Lowband
Chapter 3
Chapter 4
Third-Order
Intermodulation
Distortion
Second LO Power
Lowband Mixer Bias
SLODA/FELOMA
A19 RYTHM
A20 Lowband
A10 3rd Converter
Chapter 3
Chapter 4
Third-Order
Intermodulation
Distortion (Wide IF)
But not failing the
normal TOI test
A31 Wideband Analog IF Chapter 8
Gain Compression Second LO Power
Lowband Mixer Bias
A20 Lowband
A10 3rd Converter
A19 RYTHM
Chapter 3
Chapter 4
Power Bandwidth
Accuracy
None A8 Analog IF
A7 Digital IF
Chapter 6
IF Amplitude Ripple None A8 Analog IF/
A31 Wideband Analog IF
A10 3rd Converter
Chapter 6
Chapter 3
Chapter 4
IF Phase Ripple None A12 Synthesizer Chapter 5
Input Attenuation
Switching
Uncertainty
None A14/A15 Input Attenuators
A13 Front End Driver
The A8 Analog IF or A7
Digital IF assemblies may
have come unseated. Assure
these assemblies are fully
inserted in the motherboard.
Chapter 3
Display Scale Fidelity None A7 Digital IF
A8 Analog IF
Chapter 6
Table 2-4 Performance Test Failures
Failing
Performance Test
Adjustment Probable
Faulty Assembly
Troubleshooting
Information