ATV VIDEO XMTR, 4 CABLE CH, 5 WATT, A/V INPUT
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MFJ-8709$ 199.95 Each
|This super high performance amateur radio ATV transmitter module is capable of putting out a whopping 4.5 Watts! The RF power output is controlled by an analog potentiometer from near zero output to 4.5 Watts maximum. Current draw varies with power level selected.|
Frequency control is provided by means of a digital integer-N, phase locked loop. Dual PLLs provide a frequency locked video carrier and an audio sub-carrier. Transmit frequency is selected via a four position dip switch. Four standard US ATV frequencies 426.25, 427.25, 434.00, and 439.25 MHz on channels 58, 59 and 60.
Video modulation is accomplished by a 12-bit digitally controlled DAC-digital to analog controller. A specially embedded software algorithm controls the modulation depth and pre-distortion level to deliver an ultra-clean video signal to the final RF amp.
High power transmitting over 0.5 Watt output requires an external heatsink. When provided with an external heatsink, MFJ-8709 can be used for extended key down operation. Reverse polarity protected.
RF power output: 4.5W Max, 50 Ohm
Audio Subcarrier: 4.5 MHz
Spurious Outputs: Better than -40dBc
Phase Noise: -75 dBc/Hz @ 500 KHz
DC power in: 12-13.5 V Max, (+/-100mV)
Current Draw: 2.2 Amps @max output
Frequency control: XTAL ref. to 4 MHz
Frequency stability: +/-20 PPM
Video In: Composite NTSC 1V P-P
Audio In: Line level 200-250 mV RMS
Operating Temp: -20o to +85o Celsius
Size: 2.35Wx2.8Dx.75H inches
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