Channel Amplifier Alcad ZG-421 ch. C51-C55
View of a set of Alcad channel amplifiers (on
R912120 frame, with
R905083 PSU)
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.
A set of ZG-421 channel amplifiers is powered from the AS-125
R905083 power supply and usually placed on the SP-126
R912120 mounting frame (the frame can carry the power supply and up to 12 amplifiers).
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.
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 |