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Each channel amplifier of the ZG-421 series is pre-tuned to a desired channel by the manufacturer - making an order it is necessary to give the channel number.
Channel amplifiers of the ZG-421 series are top class devices designed for filtering and amplifying TV signals in the UHF band (470-862 MHz). They can process both analog and digital signals DVB-T). The output signals can be distributed in large shared antenna systems (MATV/SMATV) - in multi-dwelling units, hotels, public buildings etc.
The great advantage of the ZG-421 series is high selectivity, consisting in capability of filtering the desired signal from among the variety of signals on the input. Attenuation of undesirable signals on the neighboring channels (N+1, N-1) equals 17 dB, and on the N+2 and N-2 channels is 56 dB.
The ZG-421 amplifiers can be used together with the older ZG-401 ones.
Frequency characteristics of the ZG-401 (blue) and ZG-421 (red) channel amplifiers.
It is clear that the selectivity of the ZG-421 series is much better.
It is clear that the selectivity of the ZG-421 series is much better.
Specifications
Name | ZG-421 |
Code | R90517P |
Channels | 51-55 |
Gain [dB] | 53 |
Bandwidth [MHz] | 8 |
Gain adjustment range [dB] | 20 |
Max level of output signal (DIN 45004K) [dBμV] | 2x120 |
Selectivity (N+1 or N-1 channel) [dB] | 17 |
Selectivity (N+2 or N-2 channel) [dB] | 56 |
Noise figure [dB] | 3.5 |
Connectors [mm] | IEC 9.5 |
Power [V/mA] | +24/75 |
Weight (single module) [kg] | 0.40 |
Operating temperature [°C] | -10...+65 |
IP rating | IP20 |
Dimensions (height x depth x width) [mm] | 196x76x32 |