The PRXXY/Ds radio link system is an advanced design, long haul microwave equipment, suitable for temporary applications, in which ease of installation and versatility of operation are particularly important.
It is capable of supporting both analogue and digital modems. In the digital configuration it can support data rates up to 51 Mb/s with different modulation techniques (4QAM offset, 16 QAM).
The analogue configuration supports the transmission of 1 TV (colour) signal and 4 sound channels, or 1 analogue TV signal, 1 sound channel and one 2 Mb/s digital stream in super-video sub carrier.
From the front panel, or from an external PC, it is possible to control and monitoring very easily the output RF frequency, the output level, the RF received level, all the alarms and so on.
The system is available in different versions, covering a wide range of RF frequencies: 5, 6, 7, 10, 12, 14, 18 and 23 GHz. It is composed of one indoor unit in 19" 3RU rack; the digital modem replace audio boards and is a plug-and-play module. The PRxxy/DS employs the most modem design techniques: frequency synthesis allows the user to set the desired RF frequency from the front control panel or from a personal computer, connected through a serial port.
In order to improve digital performances and give protection, it is possible to combine two PRxxy/DS both in Tx and Rx site, using a 1+1 Hot Standby equipment for switching between modulator and/or RF parts at TX site, and an Hitless switch at Rx site.
The ODU is a waterproof head. The connection to the IDU is obtained with only a coaxial cable (up to 300 m. long) with automatic equalization. This cable transports the IF, the ODU DC supply and the M&C signals.
The IDU includes the power supply unit from mains or battery operation, the information processing equipment, the IF digital or analog mod/dem as well as the local and remote alarms.
There is no need of output RF channel filter because of high clear spectrum and possibility of frequency agility.
The output RF channel filter is available on request for particular applications in which is needed an extreme spectrum cleaning. |
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-TECHNICAL CHARACTERISTICS- Radio Link PRxxy/D |
| Compliance |
ETSI EN 301 216 - ETSI EN 301 128 |
| Frequency range |
5, 6, 7, 10, 12, 14, 18, 23 GHz |
| Analogue modem transmission capacity |
1 TV + 4 audio
1 TV + 1 audio + 2 Mb/s |
| Digital modem transmission rate |
E3 (34 Mb/s), DS3 (45 Mb/s), STM-0 (51 Mb/s) |
| Digital data interfaces |
G703 |
| Digital modulation |
4QAM offset, 16QAM |
| Digital modem functionalities |
Adaptive equalization
Reed Solomon coding
Data Rate, FEC, Roll-off factors programmable |
| RF output power after RF filter (minimum guaranteed) |
Freq. (GHz) |
Analog |
Digital
4QAM |
Digital
16QAM |
5 - 6 - 7 |
+31.5 dBm |
+28.5 dBm |
+25.5 dBm |
10 - 12 - 14 |
+30.0 dBm |
+27.0 dBm |
+24.0 dBm |
18 - 23 |
+20.0 dBm |
+17.0 dBm |
+14.0 dBm |
| Total Frequency stability |
± 5 ppm |
| Tx and Rx technology |
Double conversion |
| Intermediate frequency |
70 MHz (Tx and Rx) |
| Frequency source |
Synthesized oscillator |
| Threshold for BER = 10-6 (typical for 10 GHz link) |
34 Mb/s -
4QAM |
34 Mb/s -
16QAM |
45 Mb/s -
16QAM |
51 Mb/s - 16QAM |
-83 dBm |
-80 dBm |
-78 dBm |
-76 dBm |
| A.G.C. dynamic range |
> 60 dB |
| Mechanical structure |
Rack 19", 3HU |
| Power supplies |
85 ÷ 230 VAC / 48 VDC |
| Power consumption |
< 150 W |
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| R.F. (I/O) |
"N" type (female) or waveguide |
| IF (IDU & ODU) |
LEMO 75 ohm |
| G703 (I/O) |
1.6/5.6 or BNC (female) 75 ohm |
| Video (I/O) |
1.6/5.6 or BNC(female) 75 ohm |
| Audio (I/O) |
HR10A-7R-6S |
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