4Pelco Manual C901M - 1/94
4.3 TROUBLESHOOTING
It is recommended that the wireless transmission con-
trol link system be first tested with both the WLV500
and WLV1000 transmitters and receivers in close prox-
imity (3 to 6 feet), to ensure proper interconnection of
the coaxitron receiver and transmitter with the wireless
transmitters and receivers. If all interconnections are
made appropriately as described, there should be unin-
terrupted remote control of the pan and tilt device. If
there should be difficulties at this point then:
1. Check the performance of the system minus
the wireless control link transmitter and re-
ceiver by directly connecting the coaxitron
transmitter to the coaxitron receiver. This will
verify the performance of the coaxitron sys-
tem, as well as verify that the interconnecting
cables are good.
2. If the verification detailed in (1) above is
performed and the system is fully reconnected
and there is still not full control, check the
power supply voltage. If the voltage out of the
supply is less than 12.0 volts, the power supply
needs to be replaced. Please contact PELCO
for a replacement.
3. If the system is still not operating after
successfully verifying the steps above, the
fault must lie within the wireless control
link system. Please contact PELCO imme-
diately for a replacement. It is our policy to
provide quality products to our customers.
If the transmitter and receiver are now placed in their
required locations and there is intermittent control fail-
ures on the pan and tilt, there are several possible
reasons that need to be addressed individually.
1. Exceeding Maximum Range
The base models of these units are specified to
operate at 1,000 feet maximum line-of-sight
distance. Obstructions between the transmit-
ter and receiver antennas will reduce maxi-
mum range. The maximum distance will vary
depending on the type and number of obstruc-
tions encountered. If the operating distance is
nearing 1,000 feet, then we recommend an
upgrade to the receiver antenna.
2. Interference
The WLV500 Series transmit in the 2.4 GHz
band. Although this band is less crowded than
the 900 MHz band, it is still susceptible to
some outside interference, including mobile
video transmission. Most interference should
be very temporary, but if consistent interfer-
ence occurs there are 3 channels that are avail-
able. At no cost to the user, the unit can be
replaced by a system that operates in another
channel.
3. Multipath Reception (Ghosting)
Since the WLV500 Series employs FM modu-
lation of the data onto the carrier it is less
susceptible to multipath interference than com-
mercial broadcast systems that employ ampli-
tude modulation. The WLV500 system also
employs circularly polarized antennas that
provide some immunity to multipath reflec-
tions. However, multipath interference can
occur and depends on antenna location rela-
tive to nearby metallic objects, and on the
direction the antenna is facing. The receiver
antenna provides the most gain and highest
multipath immunity when it is directly facing
the transmitter. If multipath interference oc-
curs, it can usually be eliminated by relocating
or reorienting the receive antenna a small
distance (less than 1-2 feet).
Note: Due to the difficulty of predicting the suscep-
tibility of any one application to the transmis-
sion limitations described above, it is gener-
ally recommended that site testing occur prior
to installation. Consult your customer service
representative to obtain further information.