Amplifiers with 2 year's warranty - ZG-series of Alcad. These top-quality channel amplifiers belong to the most popular equipment used in professional MATV installations.
View of the set consisting of the ZP-004 frame -
R905514, power supply - AS-102
R90500, 1x ZG-201 amplifier -
R90512, 9x ZG-601 amplifier -
R90538, 1x ZG-301 amplifier - R90515, and channel converter - CO-403 R90533
Main advantages of the sets based on channel amplifiers of ZG-series:
- high performance confirmed by European and many national certificates,
- failure-free operation,
- reasonable price,
- easy to mount.
The series comprises many kinds of channel amplifiers with different parameters and able to work in many countries (prepared for different TV systems). As an example, in some central European countries (including Poland) there may be used:
- amplifier ZG 201 (FM), R90512
- channel amplifier ZG 401 (channels 21-69), R90517
- channel amplifier ZG 601 (channels S1-S38), R90538
- channel amplifier ZG 421 (channels 21-69), R905039
The amplifiers are powered from the AS-102 power supply -
R90500 and mounted in the ZP-004 frame -
R905514,
which can hold up to 12 amplifiers of ZG series.
The same frame may also be used for holding channel converters CO-403 - R90533, which can be powered with the common power supply.
ZG sets are characterized by high noise immunity, i.e. they can work (the amplifiers and power supply) even in an environment with comparatively high level of electromagnetic disturbances without noticeable impact on quality of the output signals. It has been reached due to solid metal construction, good shielding of active and passive elements, and special design of the power supply.
Maximum unevenness of gain (it has been proved experimentally) within any channel (there have been tested many amplifiers for different channels) is from -0.5 dB to +0.3 dB (the requirement: +/-1.5 dB). Any channel amplifier from the series is characterized by high stability of its gain, frequency characteristics and other parameters in changeable conditions (e.g. fluctuations of supplying voltage or working temperature).
The great advantage of ZG-401 series is high selectivity, consisting in capability of filtering the wanted signal from among the variety of signals on the input. Attenuation of undesirable signals on N+2 channel equals 37 dB, and on N+3 channel 60 dB.
The important parameter of an amplifier is noise figure, being the indicator of its quality. The first stage of amplification is crucial for the whole antenna installation and the resultant noise parameters. The noise factor of the amplifiers with maximum gain is at the level of 3.5 dB (permissible level is up to 8 dB).
Nonlinear distortions caused by nonlinear characteristics of active elements are practically eliminated due to proper design and use of best components and do not affect operation of the set of amplifiers. The margin of intermodulation products of third order (measured with 3-signal channel method) equals to 68 +/- dB (required min. value 54 dB).
The maximum output level (with maximum 53 dB gain) is 123.5 dBuV, which is a very good result.
The full set includes frame ZP-004 and power supply AS102 (specifications in the lower table), which have also been certified.
ZG family of Alcad features high operational reliability, it complies to ISO 9001 (ER-196/1/96) requirements. The chosen set of amplifiers and the power supply are mounted in the frame made of ZN-AL alloy, which allows for easy assembling and ensures good common grounding.
Specifications of ZG channel amplifiers
Name | ZG-201 | ZG-401 | ZG-601 | ZG-421 |
| |  |
Code | R90512 | R90517 | R90538 | R905039 |
Working bands [MHz] | 88-108 | 470-860 | 68-174
230-470 | 470-860 |
Maximum gain [dB] | 30 | 53 | 52 | 53 |
Bandwidth [MHz] | 20 | 8 | 8 | 8 |
Gain adjustment [dB] | 20 |
Max. output level
according to DIN 45004K [dBuV] | 2x123.5 | 2x120 |
Selectivity, one-channel spacing [dB] | – | 32 | 28 | 56 |
Selectivity, two-channel spacing [dB] | – | 53 | 42 | - |
Noise figure [dB] | 5 | 6 | 3.5 | 3.5 |
Connectors [mm] | IEC 9.5 |
Supplying voltage/current | +24 V/75mA |
Weight (one module) [kg] | 0.40 |
| Working temperature [°C] | -10 to +65 |
| Housing index | IP20 |
Dimensions (L x W x H) [mm] | 196x76x32 |
Specifications of power supply
Name | AS-102
 |
Code | R90500 |
Output voltage [V] | +24 |
Maximum output current [mA] | 1100 |
Power consumption [W] | 35 |
Input voltage [VAC] | 230±15% 50 Hz |
Working temperature [°C] | -10 to +65 |
Weight (one module) [kg] | 1.0 |
Dimensions (L x W x H) [mm] | 200x120x120 |
