X-3
Symptom
Possible Fault
Correction
Weak output or picture
Low level input signal
Verify presence and level of
input signal
Low output power
Verify power amplifier output
with wattmeter and dummy
load
Incorrect modulation depth
Adjust to meet specification
High reflected power
Incorrect load
Ensure amplifier connected to
transmission line
Ensure correct antenna
impedance (50 ohms)
Check antenna tuning and
VSWR. Verify correct cable for
transmission line length
Check all cables for visible
damage (kinks, nicks or cuts)
Check all connectors for poor
connections, water or corrosion
Check alignment of antenna
Check for physical damage of
antenna, including ice build-up
