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Fordray Product Information

Catalog

The Linear Broadcast LBL800 TX/RX pair is Fordray's 800MHz studio / transmitter link solution. The LBT800 Transmitter accepts a mono or MPX input audio signal and outputs up to 5 Watts in the 845 to 851MHz band with no tuning required after the initial frequency setup, performed with DIP switches. A low pass output filter reduces out of band emissions to insignificant levels. The LBT800 corrects phase and amplitude changes that may occur in the link system and a microprocessor controls the transmit frequency for a rock-steady carrier with excellent long term stability. The LBR800 Receiver provides multiplexed output, de-emphasised 600 Ohm balanced output and is fitted with metering and internal mute and level controls. The LBR800 may be tuned to any frequency within the STL band via DIP switches.

Output Power

0.1 to 5 Watts, 'N' type connector

Output Frequency Range

844.8 to 852.0 MHz

Out of Band Emissions

>-70dBm

In Band Emissions

>-65dBm

Audio Input - Mono (XLR)

+4dBm, 600W bal. for 75kHz

Audio Input - MPX (BNC)

4V p/p 10kW for 75kHz

Signal to Noise

>68dB

Audio Signal Bandwidth:

 - Mono

30Hz to 15kHz: ±1dB

 - MPX

30Hz to 65kHz: ±1dB

Power Supply

240V AC 50Hz 50VA

Input Impedance

50W 'N' type connector

Frequency Range

844.8 to 852.0 MHz

Output Levels:

 - Mono

+4dBm, bal. 600W

 - MPX

4V p/p

De-emphasis:

 - Mono

50mS

 - MPX

Flat

Frequency Response:

 - Mono

30Hz to 15kHz: ±1dB

 - MPX

30Hz to 65kHz: ±1dB

Distortion

<0.24% @ 75KHz deviation

Image Rejection

>65dB

Mute Threshold

3mV

Signal to Noise

>68dB

Power Supply

240V AC 50Hz ±10% 20VA