User's Manual

X-2
Troubleshooting
The first and most important aspect of troubleshooting anything is to be systematic. Note where you
have looked and what you found.
Look first for the obvious.
• Make a physical inspection of the entire facility. Are all necessary connections properly made? Do
you see any signs of obvious damage within the equipment?
• Is there DC power to the site and the equipment?
• Are all the switches in the correct operating position?
• Is the input signal present?
• Check LCD readings for presence of forward and reflected power and 30 V DC supply levels.
The above is an aid in determining the fault if some aspect of the system is not operating. The
following table deals with quality of operation:
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