DVMO RF D/CONV

As mentioned elsewhere in this section, the dVMo receiver system consists of two sections, the masthead units and the main receiver and decoder unit.

The main receiver has a tuneable radio frequency input below 1GHz.When operating within this tuning range the masthead device needs to be an amplifier only that has the right amount of gain and a low noise figure. When operating at frequencies above 1GHz the masthead unit is a downconverter assembly which filters the incoming wanted signal and converts this narrow window down to below 1GHz.

In either case the electronics are housed in waterproof highly resilient IP65 enclosures and are phantom powered by the dVMo receiver feeding a DC supply via the coaxial cable feeding up to the masthead.

Because the system is designed for diversity operation, there will be two masthead units deployed in every system installation, either two head amplifiers or two downconverters. For more advanced systems this number could multiply as more receivers are brought into play.

A key aspect of this type of split hardware is that providing the masthead devices are of good quality, low noise figure and sufficient gain, the cable connecting the masthead to the main receiver can be of relatively poor grade for a short run of cable or for a long cable run something of a medium quality. In both cases cost is reduced and absolute system performance is improved.

Once agains this is a highly complex area for design discussion and it is recommended that advice is sought from our experienced Sales support team.