TVA-100 Channel Amplifier

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* High selectivity
* Automatic energizing of antenna preamplifier and energizing block in case of fault   (non-personal operation)
* Output level control
* RF input for signal summation
* Plug-in design
* F-type connectors

It is intended for set channel amplification. A possibility of antenna preamplifier energizing and amplifier cascading: input cascading (in case of several channel reception by one antenna) and output cascading (signal summation from separate amplifiers).

Product Specifications
Frequency Range 47 - 862MHz
Bandwidth 8 MHz
Gain 30 ± 3 dB
Input Level 60-100 dB/µV
Rated Output Level 90 dB/µV
Selectivity (single-channel spacing) 35 dB
Depth of Gain Control 20 dB
Summation Loss per Pass 1 dB
Supply Voltage/Consumption Current 12V/0,3A
Dimensions 193x102x35 mm
Weight 400 g
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Channel amplifier characteristics enable to reduce the output signal level spread from 60 to 90 dB/µV to one value of 80 dB/µV without signal quality loss. See below an example of 10 channel amplifier cascading. Signal of the 10th channel amplifier arrives at the output with a signal loss of 1*10=10dB. The loss is caused by loss in directional couplers. Its level amounts to 90-10=80 dB/µV at the output while having the 10th channel amplifier maximum level of 90 dB/µV. If the output level of the 1st amplifier is 90 dB/µV then it should be not enhanced but suppressed by 10 dB, so that the level is equal at the output to the 10th channel amplifier signal level. The suppression of the signal arriving to the first channel amplifier by 10 dB is possible when an additional attenuator is switched on (see the left fig. at the top) over to a point of 20 dB (the amplification should be tuned in such a way that it provides an amplification of +10dB).

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Note: Remember that while using an additional attenuator at the input of every channel amplifier the signal level after suppression should not be lower than 60 dB/µV, otherwise the signal quality decreases.