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TV Modulator TERRA MT41

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  • TV Modulator TERRA MT41

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TV Modulator TERRA MT41
Producer: Terra
Double sideband modulator MT41 has a microprocessor control - the choice of output 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).
In comparison to the previous series, these Terra modulators can provide compatibility with many versions of the PAL system.
Adjustment options:
- video carrier frequency,
- RF output level,
- audio subcarrier frequency,
- A/V ratio,
- standard deviation (+/-50 kHz) of audio carrier for input level 150-775 mV

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.





Video input


frequency range

20 Hz - 6 MHz

level / impedance

1 V +/- 1 dB
at 75 ohm

Audio input



frequency range

20 Hz - 15 kHz

level adjustment

+ 1 ... -14 dB

level (adjustable) / impedance /  standard deviation

775 mV RMS / 10 kohm / 50 kHz

RF output

level (typical) / impedance

90 dBuV / 75 ohm


level adjustment

0 ... -20 dB


PAL version



frequency range

470 - 862 MHz

Carrier frequency error

+/- 50 kHz

Audio subcarrier frequency

4.5; 5.5; 6.0; 6.5 MHz

Fine tuning range of video carrier frequency

+/- 2.25 MHz,  0.25 MHz step

RF loop-through loss (SAT / Terr)

2.5 / 1.5 dB

RF loop-through frequency range

47 - 2150 MHz

Frequency response variation (video)

+/- 1 dB

A/V ratio

12/16 dB

Amplitude modulation depth (typical)

81 %

SNR (weighted)

>= 55 dB

Supplying voltage / power consumption

230 VAC 50 Hz 2.5 W

Operating temperature range

-10 ... +50 deg C

Dimensions / Weight

133x73x39 mm / 0.36 kg


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