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Vestigial side band modulator MT31 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

Name
MT-31

Code
R871736

Video input
frequency range
20 Hz - 6 MHz

level / impedance
1 V +/- 1 dB
/ 75 ohm

Audio input
frequency range
20 Hz - 15 kHz

level / impedance / standard deviation
775 mV RMS / 10 kohm / 50 kHz

RF output
level (typical) / impedance
70 - 80 dBμV
/ 75 ohm

level adjustment
0 ... -10 dB

PAL version
B/G/D/K/I/L

frequency range
470 - 862 MHz

Video carrier frequency error
+/- 50 kHz

Audio subcarrier frequency
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 (RF IN / RF OUT)
2.5 dB

RF loop-through frequency range
47 - 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 / weight
133x73x39 mm / 0.36 kg
Σχετικές αναζητήσεις

Δορυφορικά

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Ήχος - Εικόνα

 

Modulator

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Terra

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