Troubleshooting – Muxlab Active CCTV Transmitter Balun User Manual

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Consult the following gain adjustment switch table to determine the correct
switch setting according to cable length. ON=Up. OFF=Down

Length - ft (m)

SW1

SW2

SW3

SW4

0 to 750 (0 to 228

OFF

750 to 1,500 (228 to 457)

OFF

1,500 to 2,250 (457 to 685

OFF

2,250 to 3,000 (685 to 914)

OFF

With a pointed tool, slide the gain switches into the correct position as shown in
the following diagram. The UP position is ON. The DOWN position is OFF.

Connect the red/black power lead to the power input terminals of the CCTV
camera. Connect the CCTV power supply to the same terminals. If 24VAC is
used, ensure that it is floating with respect to ground. Caution: Using a non-
floating 24VAC PSU may cause permanent damage to the balun.

Connect the balun’s coax video lead to the BNC video output of the CCTV
camera. The following diagram shows the completed connection.

Identify the pin configuration of the balun on the twisted pair side. One twisted
pair is required per camera video signal. Note: The CCTV Balun video output
is reverse polarity sensitive. Please ensure that “Ring” is connected to “Ring”
and “Tip” is connected to “Tip”.

At the head-end connect a passive CCTV Balun (i.e. 500009, 500023, 500130)
or Active CCTV Receiver Balun (500015) into the BNC connector of the CCTV
receiver equipment (i.e.; DVR, IP encoder or monitor).

10. Complete the connection between the two baluns, using standard UTP cable,

connector blocks and modular wall outlets.

11. Power-on the CCTV equipment and check the picture quality. The video should be

clear and sharp within the maximum specified distances. The following diagram
shows a couple of typical installations.

Troubleshooting

The following table describes some of the symptoms, probable causes and possible
solutions in respect to the installation of the Active CCTV Transmitter Balun. If you still
cannot diagnose the problem, please call MuxLab Customer Technical Support at 1-877
689-5228.

Symptom

Probable Causes

Possible Solutions

Poor picture quality,
distortion, interference,
etc.

1. EMI interference.

Check that wiring is not too close to
transformers and ballasts.

2. Wires reversed on

signal pair on one
side

Make sure that the wires on the signal
pair are not reversed on one side.

3. Split pair

Check if the UTP pairs are split and
correct. Each signal pair must be
twisted.

4. Ground loop voltage

greater than 5V

Equalize ground loop differences.

No video image

1. Power-off.

Check power supplies of CCTV
equipment.

2. No power

Check power leads from balun

3. Wrong pin

configuration

Check pin configuration and verify
straight-through wiring.

4. Defective CCTV

Balun

Change CCTV baluns for another
pair.

5. Power overvoltage

Reset balun by turning camera power
off and on.

Picture over-
compensated

Too much
gain

Adjust gain switch to lower setting

Picture faded, weak
or no color

Not enough
gain

Adjust gain switch to higher setting.