Product Detail

Generals. The TMT 4/4 is a 4 GHz microwave link transmitter that can carry simultaneously 1 video and up to 4 high-quality 15 kHz analog audio programs. The output power is 1 W in the whole 4.2 - 4.8 GHz frequency band. The audio channels are fully compatible with the ITEL digital audio codecs TD/16 and RD/16 (2-channels).

Features. Some TMT 4/4 microwave characteristics are:
-the A/V intermodulation almost canceled;
-the capacity to accept simultaneously 1 video, up to 8 digital audio programs, and up to 4 x 4800 bps data channels;
- the easy RF frequency setting with a 125 kHz steps digital PLL. No tuning is required within 100 MHz range.

Antenna connection. ITEL parabolic antennas enable the direct connection to the microwave feeder without wave-guide losses.

Metering. A front panel digital multimeter and alarms permit to check audio and video levels, RF received signal level, PLL lock and squelch status. The equipment meets or exceeds the international standards for safety and electrical specifications.


	TMT 4/4 Microwave Links
	Generals. The TMT 4/4 is a 4 GHz microwave link transmitter that can carry simultaneously 1 video and up to 4 high-quality 15 kHz analog audio programs. The output power is 1 W in the whole 4.2 - 4.8 GHz frequency band. The audio channels are fully compatible with the ITEL digital audio codecs TD/16 and RD/16 (2-channels). Features. Some TMT 4/4 microwave characteristics are: -the A/V intermodulation almost canceled; -the capacity to accept simultaneously 1 video, up to 8 digital audio programs, and up to 4 x 4800 bps data channels; - the easy RF frequency setting with a 125 kHz steps digital PLL. No tuning is required within 100 MHz range. Antenna connection. ITEL parabolic antennas enable the direct connection to the microwave feeder without wave-guide losses. Metering. A front panel digital multimeter and alarms permit to check audio and video levels, RF received signal level, PLL lock and squelch status. The equipment meets or exceeds the international standards for safety and electrical specifications.




	TMT 4/4 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