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Discontinued items

VSB TV Modulator: Terra MT-31 (21-69 BG/DK)
Code: R871736
Withdrawn from the offer
TV Modulator: Terra MT-10P (B, D, ch.6-12 & S9-S16, with power supply)
View of the modulator
TV Modulator: Terra MT-10P (B, D, ch.6-12 & S9-S16, with power supply)
View with the cover open
TV Modulator: Terra MT-10P (B, D, ch.6-12 & S9-S16, with power supply)
Front view
TV Modulator: Terra MT-10P (B, D, ch.6-12 & S9-S16, with power supply)
View of the packaging
Vestigial side band modulator MT31 R871736 is an attractively priced solution for antenna systems distributing lots of TV channels. Thanks to the advanced modulation technique, the devices can operate on adjacent channels, without the need of at least two channel gaps necessary in the case of conventional, dual side band modulators.
The modulator is microprocessor controlled - the choice of the RF channel is performed with two buttons (after opening the case) and its number is displayed on the LED display (similarly to any other parameter being adjusted). All parameters of the modulator are stored in a non-volatile memory. The use of quartz stabilizer (PLL) practically eliminates frequency error.
The modulators can be connected in cascade. Their signals can also be combined with terrestrial TV channels. There is a possibility to protect each device against unauthorized access to the settings.
The device supports multi-standard operation (audio): B/G/D/K/I/L.
The user can adjust:
  • video carrier frequency,
  • audio input sensitivity,
  • A/V ratio.
The modulators can be successfully used both in home antenna installations as well as in small-sized MATV systems. Their 80 dBuV output level ensures direct distribution of the RF signals to several antenna outlets. More complex systems will require to use UHF or channel amplifiers. Meticulous quality control in Terra company makes these devices virtually failure-free.
Specifications
NameMT-31
CodeR871736
Video input
frequency range20 Hz - 6 MHz
level / impedance1 V +/- 1 dB
/ 75 ohm
Audio input 
frequency range20 Hz - 15 kHz
level / impedance / standard deviation775 mV RMS / 10 kohm / 50 kHz
RF output 
level (typical) / impedance70 - 80 dBμV
/ 75 ohm
level adjustment0 ... -10 dB
PAL versionB/G/D/K/I/L
frequency range470 - 862 MHz
Video carrier frequency error+/- 50 kHz
Audio subcarrier frequency5.5; 6.0; 6.5 MHz
Fine tuning range of video carrier frequency+/- 2.25 MHz (0.25 MHz step)
RF loop-through loss (RF IN / RF OUT)
2.5 dB
RF loop-through frequency range47 - 862 MHz
Frequency response variation (video)+/- 1 dB
A/V ratio
14/18 dB
Amplitude modulation depth (typical)81 %
SNR (weighted)≥ 55 dB
Power / Power consumption
 230 VAC;  50 Hz; 4 W
Operating temperature-10 ... +40 °C
Dimensions / weight133x73x39 mm / 0.36 kg
Withdrawn from the offer
 
VSB TV Modulator: Terra MT-31 (21-69 BG/DK)
Code: R871736