Lectrosonics UMCWB 537-768MHz UHF Antenna Multi Coupler

The purpose of wideband architecture is to provide the flexibility needed to deal with a changing RF environment and for mobile productions that cover broad geographic areas. The Lectrosonics UMCWB provides a mechanical rack mount with power and RF signal distribution for four diversity compact receivers in a single rack space. The standard version covers frequency blocks from 21 through 29. The wideband low version covers frequency blocks from 470 through 26. The RF multicoupler preserves the sensitivity and overload performance of the finest receivers. Selective filtering in the front end attenuates RF signals above and below the passband to suppress intermodulation and noise. Following the filters is a low noise RF amplifier with gain matched to compensate for the losses in the splitter that follows. A precision strip line splitter/isolator divides the RF signal into four isolated signals preventing spurious RF coupling between receivers. The splitter/isolator is termination independent which prevents mismatched or disconnected RF outputs from affecting the other receivers. The assembly is powered from an external source of 11 to 18 VDC with individual auto-reset fuses for each receiver in the RF/power distribution module. This architecture eliminates ground loops and AC hum that can occur when the receiver outputs are connected to other audio equipment operating from a different AC source. Antenna Input Standard 50 ohm BNC connectors are used for the antenna inputs and signal distribution. The RF signals are fed to the receivers via coaxial cables that loop through the front panel to the receiver inputs. The leads are labeled as "A" and "B" and routed so that each receiver has one of each connected for diversity reception. Power Supply The multi-coupler is powered by external 12 VDC (11 to 18 VDC is acceptable). The center pin of the input jack is positive. The power supply must be capable of handling up to 2 amps of current. DC power is distributed to the receivers via rear panel pigtail connectors. The Lectrosonics PS70 is a switching power supply with coaxial connector matched to the 12VDC power jack on the multicoupler. The AC receptacle is a standard, grounded IEC 60320 C14 inlet socket that will accept common cords like those used on computer equipment (AC cord is not included). Output cable is 6' long.