 Shift frequency repeater makes the receiving frequency and transmitting frequency shift in U wave band. It is an equipment that changes the received MUDS low-end or high-end microwave signals frequency up-convert(down-convert)to the U wave band high-end(low-end) radio frequency signal and after amplified to the required power then transmitted by the antenna.
It is belongs to the frequency changing repeaters, but its RF Frequency difference is less, only tens to 100MHz .So it is more technically challenging. Through engineering practices, the equipment has resolved technical problems of signal blocking caused by preventing transmitting-end signals intervene into the receiving-end.
The equipment adapts to DVB-C, DVB-S, DVB-T (H), DMB-T, ADTB-T, and other international and domestic standard terrestrial digital microwave transmission and coverage systems.
equipment characteristics
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??Output power do not change with input level
??Wide AGC control range
??Output power instruction
??Receiving level instruction
??Low noise amplifier supplied by power amplifier, does not need a separate power supply.
??High linearity and transmission quality
??Modular Design
??Convenient installation, commissioning and maintenance
??Largeacreage radiator ,natural cooling, without fan
??Few easily damaged parts and high reliability |
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Main technical data
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input frequency |
470 MHz-860 MHz high-end or low-end |
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output frequency |
470 MHz-860 MHz low-end or high-end |
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LO frequency |
80 MHz-200 MHz |
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Crystal frequency stability |
1x10-6 |
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Crystal phase noise |
-100dBc/Hz 10KHz |
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Total gain |
95dB-105dB |
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noise coefficient |
-2.5dB(not include input filter) |
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input level |
-35dBm-65dBm(AGCrange) |
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Output digit average power |
0.5 W-20W |
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third-order inter-modulation |
-50dBc measured at the point of output digit average power |
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power supply voltage |
AC/DC+12V |
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power consumption |
50 W??-500W |
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