User manual

Installation
1 - 10 ADPRO FastTrace, Issue 5
1.8.1 Video Input Requirements
To ensure high quality images, the ADPRO FastTrace must synchronise correctly to the incoming video signal for the
selected video standard. For synchronisation to occur the following conditions must be met:
• the synchronisation pulse amplitude at each video input must be within the range of 0.2 volts to 0.4 volts,
• the peak video amplitude with reference to the black level (ie. not including the synchronisation pulses) at
each Video Input must be within the range of 0.5 volt to 1.0 volt, and
• for colour cameras, the minimum colour burst level at each video input must be at least 100 mV.
If the video level is low, cable compensators or video line drivers should be installed at the video source. They should
be adjusted to boost the video signal to within the voltage limits given above.
1.8.1.1 Maximum Camera Input Cable Length
The maximum cable length that can be used from a camera before cable compensators are required is dictated by the
desired quality of the video picture. Generally, the shorter the cable between the camera and the ADPRO FastTrace
the better the video picture quality.
Use the following information as a guide for RG59 type coaxial cable (75 ohm nominal impedence):
• In a monochrome system, depending on the resolution required, the cable length should be restricted to
500 metres (1600 feet) before cable compensators are installed
• Signal degradation due to the coaxial cables characteristics has a far greater effect on colour video. In a
colour system, the coaxial cable length should be limited to 250 metres (800 feet) before cable
compensators are installed. Again the length is dependent on the required picture quality
1.9 Video Output (Monitor Output)
Monitors can be colour or black and white, capable of receiving composite video signals via a 75 ohm BNC connector
on the rear panel. Monitors must match the desired TV standard set for the chassis, either PAL (CCIR) or NTSC
(RS 170).
Use a monitor connected to the MON 1 video output to view the camera sequence in current use.
1.10 Connecting Communications Devices
ADPRO FastTrace provides a number of interfaces for connecting communications devices to allow remote access to
the system. These interfaces are available via the COMMS 1, COMMS 2 and NETWORK connectors on the rear
panel.
In general, there are three primary types of communication links available; dial-up, dedicated or network. Both dial-
up and dedicated links can be either analogue (PSTN) or digital (ISDN), depending of the type of connections available
at the site.