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Programmable UHF single-channel amplifier with automatic gain control AT-420 from Terra

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Terra dual-channel amplifier AT-420 from Terra

Terra's AT-420 single-channel amplifier is a highly selective dual tunable amplifier capable of filtering, amplifying and equalizing antenna signals across the UHF band, in analogue or digital (DVB-T) mode.

The output channels can be distributed in large MATV systems, in multi-family buildings, hotels, public buildings, etc.

Its high modulation error rate (MER), not less than 36 dB, provides excellent reception of terrestrial digital television broadcasts even in very large systems.

Each of the two independent routes can amplify a DVB-T analog or multiplex TV channel. This means that one module can amplify two digital multiplexers.

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The AT-420 single-channel amplifier includes automatic gain control (AGC).

What technical characteristics does the AT-420 amplifier have?

  • Two independent roads (sections),
  • Amplification of two analog TV channels or two DVB-T multiplexes of the whole UHF band (470 ... 862 MHz, chapters 21-69),
  • AGC: automatic equalization of all channel levels at 90 dBuV (analog mode) or 85 dBuV (DVB-T mode),
  • Channel compensation: -1 ... + 1 MHz (0.25 MHz step),
  • High modulation error rate (MER):> 36 dB,
  • Selectivity 40 dB to +/- 1.25 MHz (analog) or to +/- 2 MHz (DVB-T) from the edges of the channel due to ultra-selective SAW (Surface Acoustic Wave) filters,
  • Output level adjustment: 0 ...- 10 dB,
  • Digital interface with buttons located on the front panel,
  • Two position screen,
  • 12 VDC / 0.1 A power for a preamplifier,
  • DIN rail mounting (usually in a 19 "RACK cabinet),
  • Perfect for the transition period when broadcasters often change the frequency and power of DVB-T multiplexes.

What technical specifications does the AT-420 amplifier have?

Name at420
Code R82510
Number of channels (sections) 2
Tuning range of channels 470...862 MHz (ch. 21...69. ch. width 8 MHz)
RF input operation mode (#) analog digital
level/impedance[dBμV/ Ω] (#) 60-85/75 50-80/75
frequency range [MHz] 47-862
loop-through gain [dB] 0 +/-1.5
return loss [dB] > 12
RF output level [dBμV] 90 85
MER (digital signals) [dB] - > 36
level adjustment [dB] (#) 0...-10 (step 1)
return loss [dB] > 10
Noise figure [dB] 8
Selectivity (PAL B/G)  40 dB at +/-1.25 MHz from channel borders -
Selectivity (DVB-T) - 40 dB. +/-2 MHz from channel borders
Offset [MHz]  (#) +/-1 (step 0.25)
Spurious signals level [dBc] < -55 
Gain ripple [dB] +/-1.5
Power for masthead amplifier (#)  12 VDC / 0.1 A max
Supplying voltage [VDC]  12
Current consumption [A] 0.45
Operating temperature [ºC] 0...50
Dimensions [mm] 198x107.5x36
Weight [kg] 0.9
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More Information
EAN 8430549420021
Type Single channel amplifier
Entorno Interior
# Inputs 2
Outputs 2
LTE compatible No
Product Brand Tecatel
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