Product Detail

1 Video and up to 4 Audio. The TMM series, microwave TV link IF modulators, is designed to carry 1 video and up to 4 high quality 15 kHz analog audio programs.

Two IF availability. To suit the TMM with all RF up-converters two IF are available: the standard 1100 ¸ 1400 MHz synthesized or the 70 MHz .

Complete microwave transmitters. Using the TMM series with RF up-converters (the ITEL’s TMT series) it’s possible to obtain a complete microwave transmitter configuration. The TMT can be fitted into waterproof boxes suitable to be mounted at the rear of parabolic antennas with direct connection to the microwave feeder or can be fitted into indoor unit suitable for standard 19'' rack mounting with waveguide flange output.

Digital audio compatibility. The audio channels are fully compatible with the ITEL digital audio codecs TD/16 and RD/16.

Easy installation. The outdoor RF units can be connected with the TMM series Modulators by low power standard coaxial cables up to 200 mt length. This guarantees an easily and fast installation.

Synthesized RF channels. For the TMM Modulators with IF 1100 ¸ 1400 MHz the RF frequency channels are easy to change by a digital PLL, each 125 KHz steps.

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

Full monitoring. A front panel digital multimeter complete with alarm leds allows to check the audio and video levels, RF output power, RF RX received level, PLL lock and the squelch status.

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


	TMM Microwave Links
	1 Video and up to 4 Audio. The TMM series, microwave TV link IF modulators, is designed to carry 1 video and up to 4 high quality 15 kHz analog audio programs. Two IF availability. To suit the TMM with all RF up-converters two IF are available: the standard 1100 ¸ 1400 MHz synthesized or the 70 MHz . Complete microwave transmitters. Using the TMM series with RF up-converters (the ITEL’s TMT series) it’s possible to obtain a complete microwave transmitter configuration. The TMT can be fitted into waterproof boxes suitable to be mounted at the rear of parabolic antennas with direct connection to the microwave feeder or can be fitted into indoor unit suitable for standard 19'' rack mounting with waveguide flange output. Digital audio compatibility. The audio channels are fully compatible with the ITEL digital audio codecs TD/16 and RD/16. Easy installation. The outdoor RF units can be connected with the TMM series Modulators by low power standard coaxial cables up to 200 mt length. This guarantees an easily and fast installation. Synthesized RF channels. For the TMM Modulators with IF 1100 ¸ 1400 MHz the RF frequency channels are easy to change by a digital PLL, each 125 KHz steps. Data channel. High capability data channel is available using the baseband in/out facility. Full monitoring. A front panel digital multimeter complete with alarm leds allows to check the audio and video levels, RF output power, RF RX received level, PLL lock and the squelch status. Meets or exceeds all the international standards for safety and electrical specifications.




	TMM Microwave Links

	Overall IF/IF specifications IF standard frequency (synthesized, 125 kHz steps): TMM 1000 to 1400 MHz TMM 70 70 MHz TMM IF 70 MHz IF standard group delay (IF ± 8 MHz) ≤ 2 ns Overall BB/BB specifications (-43 dBm at receiver input) BB amplitude/frequency response (5 Hz to 9.1 MHz) within ±1dB Video amplitude/frequency response (5 Hz to 5 MHz) within 0.5 dB Group delay in video band (5 Hz to 5 MHz) within 50 ns Differential gain ≤ 2 % Differential phase ≤2° Audio channels frequency response (30 Hz to 15 kHz) within 0.5 dB Audio channels THD (1 kHz, 0 dBm) ≤ 0.3 % IF modulator characteristics (with the standard IF) Modulation CCIR 405/1 Frequency deviation ± 20 MHz pp IF output level - 2 dBm ± 0.5 dB (50 W) IF+ 24 VDC output connector N female 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 (D = 75 kHz peak.) -3 to +12 dBm (600 W bal./unbal.) Audio input connector XLR female Audio pre-emphasis (bypassable) 50 µS Audio subcarrier frequencies 7.020, 7.500, 8.065, 8.590 MHz Power supply AC 110/220 ± 15% , 50/60 Hz

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