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TV Modulator TERRA MT57 (stereo A2, B3+S2+UHF)
TV Modulátor - MT-10P (6-12 & S9-S16, se zdrojem energie)
View of the modulator
TV Modulátor - MT-10P (6-12 & S9-S16, se zdrojem energie)
View with the cover open
TV Modulátor - MT-10P (6-12 & S9-S16, se zdrojem energie)
Front view
TV Modulátor - MT-10P (6-12 & S9-S16, se zdrojem energie)
View of the packaging
High-class double side band stereo A2 audio/video RF modulator MT57 R871757 is controlled by a microprocessor - the choice of output TV channel is performed with two buttons (after opening the top cover). The channel number or any changeable parameter is displayed on the LED display and stored in non-volatile memory. Use of quartz-stabilized PLL practically eliminates frequency error. There is a possibility to protect the modulator against unauthorized change of the preset parameters.
The modulators can be connected in cascade. Their RF signals can be combined with terrestrial TV channels (it requires to match the levels of terrestrial TV signals with the RF output levels of the modulators, as well as to ensure adequate frequency spacing).

The MT57 R871757 modulator is stereophonic (A2). We also offer a monophonic version - MT47 R871747.
Adjustment options:
  • video carrier frequency,
  • PAL version,
  • audio input level,
  • A/V ratio.
The modulators can be successfully used both in home antenna installations as well as in small-sized MATV systems. Meticulous quality control in Terra company makes these devices virtually failure-free.

Specifications
NameMT47MT57
CodeR871747R871757
Video input
frequency range
20 Hz ... 6 MHz
level / impedance
1 V  / 75 Ω
Audio input 
frequency range20 Hz ... 15 kHz
level adjustment0 ... 7 dB-6 ... 6 dB (#)
level / impedance /deviation 
775 mV RMS
10 kΩ / 50 kHz
2 x 775 mV RMS
 10 kΩ / 50 kHz
RF output 
typical level / impedance
85 dBμV / 75 Ω
level adjustment0 ... -20 dB
PAL version (#)B/G/D/K/H/I/L/M/N/Australia
frequency range (#)45 ... 84, 170 ... 300, 470 ... 862 MHz
Carrier frequency error+/- 50 kHz
Audio subcarrier frequency (#)4.5 / 5.5 / 6.0 / 6.5 MHzB/G/Australia stereo A2
(sec. sound sub.  5.742 MHz)
Fine tuning range of video carrier frequency (#)max. +/- 2.25 MHz, 0.25 MHz step
RF loop-through loss2.5 dB
RF loop-through frequency range5 ... 862 MHz
A/V ratio (#)-12/16 dB
Amplitude modulation depth (typical)81%
SNR (weighted)>/= 55 dB
Power / Power consumption
230 VAC 50 Hz /
3 W
230 VAC 50 Hz /
 4 W
Operating temperature range
-10oC ... 50oC0oC ... 50oC
Dimensions / Weight133x73x39 mm / 0.36 kg
(#) menu controlled
 
TV Modulator TERRA MT57 (stereo A2, B3+S2+UHF)