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AUDIO ANALOG BALUN
4.1 Potential Problems
Symptom: Poor audio quality.
Probable Causes/Solutions:
1. EMI interference. Check that the wiring is not too close to transformers or
ballasts.
2. Split pair. If the UTP pairs are split, correct the problem. Each signal pair
must be twisted.
Symptom: No audio.
Probable Causes/Solutions:
1. Open contact. Check the wiring to ensure continuity.
2. Defective Audio Analog Balun. Change baluns for another pair.
Symptom: Weak audio.
Probable Causes/Solutions:
1. Exceeded distance specifications (see Chapter 1 for distance limits). Check
the DC loop resistance and verify if the distance specification is exceeded.
Reduce cable length or eliminate high-loss components.
2. Lower-grade UTP cable is introducing high signal losses. Use a signal repeater
for extended distance or replace the cable with a higher-grade cable.
4.2 Calling Black Box
If you determine that your Audio Analog Balun is malfunctioning, do not attempt
to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box
at 724-746-5500.
Before you do, make a record of the history of the problem. We will be able to
provide more efficient and accurate assistance if you have a complete description,
including:
8
4. Troubleshooting
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