Справочник Пользователя для Pelco WLV500-4
Pelco Manual C901M – 1/94
3
4.
The units should become fully operational
within two minutes after DC power is con-
nected, after which adjustments can be made.
within two minutes after DC power is con-
nected, after which adjustments can be made.
4.2 ANTENNA POSITIONING AND
MOUNTING
Although the video and data systems operate at different
frequencies, out of band emissions exist due to the
wideband transmission characteristics of the video sig-
nal. At the maximum operating range these out of band
video emissions can have a higher signal strength than
the received data signal due to the close proximity of the
WLV1000TX to the WLV500RX. This will “jam” the
WLV500RX receiver preventing reliable operation. To
prevent jamming and achieve reliable operation at maxi-
mum range the WLV500RX antenna must be located a
minimum of 4-5 feet from the WLV1000TX antenna.
The distance between the WLV500TX and
WLV1000RX antennas is not critical, since the narrow
band emissions of the WLV500TX will not noticeably
affect the received video signal from the WLV1000RX,
but it is recommended to maintain at least 10 inch
separation.
frequencies, out of band emissions exist due to the
wideband transmission characteristics of the video sig-
nal. At the maximum operating range these out of band
video emissions can have a higher signal strength than
the received data signal due to the close proximity of the
WLV1000TX to the WLV500RX. This will “jam” the
WLV500RX receiver preventing reliable operation. To
prevent jamming and achieve reliable operation at maxi-
mum range the WLV500RX antenna must be located a
minimum of 4-5 feet from the WLV1000TX antenna.
The distance between the WLV500TX and
WLV1000RX antennas is not critical, since the narrow
band emissions of the WLV500TX will not noticeably
affect the received video signal from the WLV1000RX,
but it is recommended to maintain at least 10 inch
separation.
The maximum transmission range for both the WLV1000
and WLV500 will be achieved when there is a clear line
of sight between the transmitter and receiver antennas.
The best reception will occur if all antennas are elevated
a minimum of 8 to 10 feet above level ground. If there
are moving objects between the antennas, such as traffic
on the road, the antennas should be elevated a minimum
of 8 to 10 feet above such objects to obtain the best
reception .
and WLV500 will be achieved when there is a clear line
of sight between the transmitter and receiver antennas.
The best reception will occur if all antennas are elevated
a minimum of 8 to 10 feet above level ground. If there
are moving objects between the antennas, such as traffic
on the road, the antennas should be elevated a minimum
of 8 to 10 feet above such objects to obtain the best
reception .
For units that have a detachable antenna on the receiver,
only a high quality, low loss 50 ohm cable (RG-8 or
similar) should be used for situations requiring a longer
interconnection between the receiver and antenna. It is
also best to position the antenna such that the front of the
antenna is directly facing the transmitter, and is not
obstructed by any metallic objects.
only a high quality, low loss 50 ohm cable (RG-8 or
similar) should be used for situations requiring a longer
interconnection between the receiver and antenna. It is
also best to position the antenna such that the front of the
antenna is directly facing the transmitter, and is not
obstructed by any metallic objects.
For large separations, it is recommended that a two-way
voice communication device be used to best position
the transmitter and receiver. When a suitable location is
found, the mounting brackets should be used to secure
the units in place.
voice communication device be used to best position
the transmitter and receiver. When a suitable location is
found, the mounting brackets should be used to secure
the units in place.
Figure 1. Typical WLV1000 Video/WLV500 Control Link System Configuration