TMT 2/2
Microwave Links
  
 

 

1 Video + 4 Audio. The TMT 2/2 Transmitter for microwave link is designed to carry 1 video and up to 4 high-quality 15 kHz analog audio programs.

Digital audio compatibility. The audio channels are fully compatible with the ITEL digital audio codecs TD/16 and RD/16. With this configuration:
-the audio quality in mono/stereo or dual-sound operations become practically the same of a CD player;
-the A/V intermodulation is almost cancelled;
-the system accepts simultaneously 1 video, up to 8 digital audio programs, and up to 4 x 4800 bps data channels.

IF operation. The connection of the outdoor boxes with the indoor modulator/demodulator is made at IF frequency with low power standard UHF coaxial cable.

Easy IF repeater assembly. A non-demodulated IF repeaters assembly are easy to obtain simply connecting the IF input/outputs of the receivers and transmitters on the outdoor boxes.

Baseband repeaters. With base-band connection it is possible to obtain a low distortion demodulated receiver/transmitter.

Sinthesized RF channels. The RF frequency channels are easy to change with a 100 KHz steps digital PLL. No tuning is required within 200 MHz range.

Data channel. High capability data channel is available using the baseband in/out facility.

Instant installation. With the ITEL parabolic antennas family the tower or pole mounting become easy thanks to universal clamps with horizontal/vertical fine adjustment, V/H polarization shifter.

Full monitoring. A front panel digital multimeter and alarms permit to check the audio and video levels, RF signal level, PLL look and the squelch status.

Meets or exceeds the international standards for safety and electrical specifications.

RF Data.
Output power and frequency range:

TMT 2/2 outdoor IF up-converter and transmitter 2 W, 1.6÷2.3 GHz
TMT 2/5 outdoor IF up-converter and transmitter 5 W, 1.6÷2.3 GHz
TMR 2 outdoor receiver and IF down-converter 1.6÷2.3 GHz

TMT 8/04 outdoor IF up-converter and transmitter 0.4 W, 5.9÷8.5 GHz
TMT 8/1 outdoor IF up-converter and transmitter 1 W, 5.9÷8.5 GHz
TMR 8 outdoor receiver and IF down-converter 5.9÷8.5 GHz

TMT 10/04 outdoor IF up-converter and transmitter 0.4 W, 10.1÷10.9 GHz
TMT 10/1 outdoor IF up-converter and transmitter 1 W, 10.1÷10.9 GHz
TMR 10 outdoor receiver and IF down-converter 10.1÷10.9 GHz

TMT 14/04 outdoor IF up-converter and transmitter 0.4 W, 14.1÷14.9 GHz
TMT 14/1 outdoor IF up-converter and transmitter 1 W, 14.1÷14.9 GHz
TMR 14 outdoor receiver and IF down-converter 14.1÷14.9 GHz


  
   
 
     
 
 
TMT 2/2
Microwave Links
  
     
 

Overall BB/BB specifications (-43 dBm at receiver input)
BB amplitude/frequency response (5 Hz÷9.1 MHz) within 0.9 dB
Video amplitude/frequency response (5 Hz÷5 MHz) within 0.5 dB
Group delay in video band (5 Hz÷5 MHz) within 20 ns
Differential gain ≤ 2 %
Differential phase ≤ 2°
Audio channels frequency response (30 Hz÷15 kHz) within 0.5 dB
Audio channels THD (1 kHz, 0 dBm) ≤ 0.3 %

Transmitter characteristics

Output RF frequency:
TMT 2 models 1.3 – 2.7 GHz
TMT 4 models 4.2 – 4.8 GHz
TMT 8 models 5.4 – 9.9 GHz
TMT 10 models 10.0 – 12.7 GHz
TMT 14 models 12.8 – 15.0 GHz
TMT 24 models 22.5 – 24.5 GHz

IF input:
Standard models 1.1 – 1.4 GHz
TMT/70 models 70 MHz
Modulation CCIR 405/1
Frequency deviation ± 20 MHz pp

Output Level:
TMT/01 models 0.1 W
TMT/02 models 0.2 W
TMT/03 models 0.3 W
TMT/1 models 1 W
TMT/2 models 2 W
TMT/4 models 4 W
TMT/5 models 5 W
TMT/6 models 6 W
TMT/8 models 8 W
TMT/25 models 25 W

Output connector N female
Spurious attenuation >75dB
Frequency stability < ± 10ppm
BB/Video input level 1 Vpp (75 W unbal.)
Video input connector BNC
Video preemphasis (bypassable) C.C.I.R. 625 lines
Audio input level (Df = 75 kHzp) -3 ÷ +12 dBm (600 W bal./unbal.)
Audio input connector XLR female
Audio pre-emphasis (bypassable) 50/75 µS
Audio subcarrier frequencies 7020, 7500, 8065, 8590 MHz
Power supply AC 110/220 ± 15% , 50/60 Hz
Operating temperature range from -10 to +45 °C
Operating humidity range < 95%

 
 
 
   

ITEL S.r.l.
TELECOMUNICATIONS AND BROADCASTING SERVICES
Via Friuli, 6 - 33074 Fontanafredda (PN) - ITALY
Tel. +39 0434 997667 - Fax. +39 0434 997687