Our equipment is most commonly used with the following types of coax video cables: RG59, CT125, CT100 and RG11 Other types of coax may be acceptable – please contact our technical support line. As a general rule the higher the specification of the cable the lower the signal losses will be and the further you will be able to send a good quality picture.

Yes, any modules ordered with a BH220 rack will be factory fitted in the rack unless the customer specifically asks for the modules to be sent as a seperate item.

Yes, the BH184 comes with a 12V DC plug-top power supply.

The BH220 rack comes complete with power supply, front panel, extender card and mains lead. You will only need to connect the coax video cables and power supply and you will have a fully functioning unit.

Yes, the BH185 unit is fully compatible with all of our twisted pair receiver units, with the exception of our type VTP-B video units.

The BH193/3125 VDA module consists of 1 x BH3125 twin channel circuit card and 1 x BH193 rear panel fitted with input and output BNC connectors. In addition each module comes with a copy of our installation guide and 4 x fitting screws. Once fitted into a BH220 rack each BH193/3125 VDA module will give you 2 seperate channels of 1 in 5 out.

Yes, each channel of our VDA module is an active amplifier with adjustments for the video signal amplitude and high frequency lift.

Yes, our BH185 unit is an active Balun. Using an active Balun gives better results than a passive type and enables video signals to be sent over longer distances.

It sounds as if you have a ground loop problem. The horizontal lines on your screen are called ‘Hum Bars’. If you have a strong video signal a passive Hum Rejection device, inserted into your cable run near the monitor should clear the problem. If your video signal is already suffering some degree of signal loss (poor quality cable / long cable run) then you will need to use an active Hum Rejection device such as our BH132 Hum Rejection unit.

All of our current range of products are 100% compatible with any of our older Launch Amplifier, Line Corrector, Video Distribution and Hum Rejection units.

Your video signal is being attenuated by the coax cable. You require some type of signal amplifier to compensate for the signal losses. For this relatively short cable run you could use a unit such as our BH184 installed near the monitor. If you have a long cable run then you would need to use a BH184 at the camera and a Line Corrector such as our BH187 at the monitor end of the cable.

In this instance you would not be able to use one of our products. The Line Corrector would correct your picture but would block the telemetry signal.

Individual screening of twisted pairs will greatly reduce the distance a video signal can be sent over. If you can, use unshielded cable for maximum transmission distances.

No! The green lamp is illuminated when the unit is working correctly. You only need to be concerned when the lamp goes off!

The BH184 unit is factory set for Unity gain. You will need to adjust the Gain and High frequency lift controls to compensate for your signal losses. Please refer to your Installation Guide for details.

Yes! Transmission of video signals using coax cable is referred to as unbalanced. An unbalanced video signal is one in which the signal level is a voltage referenced to ground. The outer screen of the coax is the ground.

Sending video signals using twisted pair cable is called “Balanced” video transmission.

If you use a short length of coax you can link one of the outputs of channel 1 to the input of channel 2. You will then have effectively joined channel 1 and channel 2 together to give a 1 in / 9 out VDA. If you repeat this process for the whole rack you will end up with an eight channel unit with each channel having 9 outputs.

We offer a repairs service for all of our equipment. Simply return the unit or PCB to us with your contact details and a brief description of the problem. We will fax or e-mail you with the repair costs for your approval before carrying out any work.