SnapShot ANPR Bollard Camera Installation Guide
Page 10 of 12
7. Field Cables
ANPR processors requires a high quality video signal to achieve maximum
accuracy and care should be taken to ensure that the signal is not
degraded during transmission. Coaxial cable is preferred for transmitting
the video signal, although high quality passive baluns used in conjunction
with a twisted-pair cable are generally fine for cable distances up to 170
metres.
For longer cable distances, the transmission system should be designed
with great care to ensure that the video level at the receiver is close to
1vpp and that the full frequency range of the video signal is maintained. If
any form of digital conversion is used, the received analogue signal should
be at least 25fps (50fps for high speed traffic), full resolution (D1) and with
no visible compression artefacts.
With regard to the 24v ac power supply, please ensure that the conductor
size is sufficient for the length of cable run to avoid too much of a volt drop.
8. Sun Hood Adjustment
If the camera is subject to a low sun, the sun hood may be extended to
reduce glare. Remove the plastic screw caps and slacken the four
retaining screws before sliding the sun hood forward.
Sun Hood Retracted
Sun Hood Extended
