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WXPO / VRC SM-2200 // RF SERVICE MONITOR
ATTUNEMENT Mission 01 // Recovered Communications Bench

GHOST CARRIER

WXPO engineering logged a maintenance hum with no program content. The SM-2200 shows a second carrier only when its tracking filter is narrowed to the correct band. Isolate it, then identify the station designation encoded by the short and long pulses.

CallsignRESOLVING
LensRESOLVING
AF SectionCALIBRATION
RF SectionCALIBRATION
WARMING SYNTHESIZED SERVICE TAPE...
Tape Input // WXPO Maintenance Reel 4C

Receiver / Analyzer Bench

FREQUENCY COUNTER
1.247.0
RF GAINTUNING
DISCRIMINATOR / CENTER TUNE
MONITOR SPEAKER
LEVEL
CH A // Oscilloscope
CH B // Spectrum // Peak Hz
Tracking Filter // RF Isolation

Select Analysis Band

FULL SPECTRUM
SERVICE MONITOR READY The strongest signal may not be the useful signal.
Station ID Register

Submit Decoded Designation

After isolating the ghost carrier, interpret the short and long pulses. Enter the four-character station designation.

No designation submitted.

ACCESSIBILITY: THIRD ASSIST IDENTIFIES PULSE SYSTEM AND TARGET LENGTH // NO MICROPHONE, CAMERA, UPLOAD OR EXTERNAL SOFTWARE REQUIRED