Retranslator - regenerator for multispan RRL
Application: Equipment is intended for constructing the multispan digital radio relay lines on the base RRL “Studio 2”. It is established on intermediate RRL stations, ensuring the isolation of digital flow, the elimination of the accumulated in it errors and its transfer to following RRL station at the master frequency. As a result of eliminating the errors accumulated in the circuit a quantity of flights can be unlimited, however, as the budgetary solution, it is calculated for 2-3 flights.
Delivery set
They enter into base delivery set: regenerator - modulator and Up- converter is driver amplifier. All the remaining necessary for the construction radio links of component - LNB, antennas, cable so forth are the standard equipment of digital satellite television and into delivery set do not enter, since it it is possible to acquire on the spot.
Construction and operating principle:
Regenerator - modulator is executed in the metal housing . The built-in tuner is separated, transport flow subjecting to regeneration by standard means in accordance with standard Dvb- S, further transport flow it enters modulator QPSK it is transferred to the intermediate frequency of 11GGts. The output signal of modulator it will be given to UPconverter- amplifier of power, which transfers signal to the operating frequency in the range of 11GGts. The precise value of frequency and the required power (from 10 to 50 mW) are determined with the order. Up-converter - driver amplifier has sizes of satellite LNB, it is designed for the installation in the focus of the transmitting antenna (standard satellite parabolic antenna) and feeds from the modulator on the HF cable.
Basic technical parameters:
|
High-frequency circuit |
|
Type of the system |
the simplex |
|
Operating frequency is selected with the order in the range |
10,7-11,7 MHz |
|
Type of the polarization |
linear |
|
The output power |
not more than 20 mW |
|
Frequency band |
7 - 27 MHz |
|
Type of modulation |
QPSK |
|
Transport flow |
MPEG2 |
|
FEC |
1/2 |
|
Nourishment |
ACE 220 v, to order - 12V |
|
Required power |
not more than 25 W |
|
Maximum range of work, with the reserve on zatukhaniyu20dB (it depends on the type of the antennas used) |
25 km. |
|
Distance from the modulator to the transmitting module (with the use of a cable of the type Rg-6u) |
to 100 m |
|
Distance from receiving module (LNB) to the regenerator (with the use of a cable of the type Rg-6u) |
to 50 m |
|
Operating conditions:
Regenerator
Transmitting head |
0 …35 ° С
-35 …45 ° С
|
|
Overall dimensions:
Regenerator
UP- converter
|
480*89*180 мм,2U
D51*, L=102*
|
|
Weight
Regenerator |
3,5 kg |
| 
