This statement is now also true also for the power supply of LNBs in the antennas of satellite Earth stations and CATV head-ends. In a chassis only 3RU high, the new DEV 8120 houses up to 23 modules with two Extended L-band bias tees 1:2 each. Still in the DEV portfolio are the 2 and 4 channel models DEV 8123/8122 in the compact 1RU chassis.
Modern LNBs feature two signal paths and are fed via the antenna cable. For that purpose, the two bias tees in one DEV 8120 module do the job, but many operators specify four bias tees or two modules per LNB to gain redundancy. Up to now DEV offered a 1RU solution for 2 or 4 channels, the DEV 8123/8122 bias tees. Using the DEV 8120, rack space can be reduced very cost-effective from up to 11RU or even 23RU down to 3RU.
Models DEV 8123 and DEV 8120 allow to electronically set as well as switch on and off the LNB supply current. Thresholds can be selected by the user from the front panel via a standard terminal application. The cost-effective model DEV 8122 offers all bias tee standard functions except LNB current monitoring.