PRODUCT DESСRIPTION

Modulator MT47 is intended to form TV channels of B/G/D/K/I/L/M/N/Australia standards in VHF and UHF ranges.

Modulator MT57 is intended to form TV channels of B/G/Australia MONO/STEREO A2 and D/K/I/L/M/N MONO standards

in VHF and UHF ranges.

Broadcasting signal has double sideband modulation.

The modulators are intended for indoor use only.

RoHS compliant.

SAFETY INSTRUCTIONS

Installation of the modulator must be done according local safety standards.

to disconnect the modulator, disconnect plug from mains socket.

the mains socket must be easily accessible;

modulator shall not be exposed to dripping or splashing water and no objects lled with liquids, such as vases, shall be placed on it;

avoid placing modulator next to central heating components and in areas of high humidity;

no naked ame sources, such as lighted candles, should be placed on modulator;

if the modulator has been kept in cold conditions for a long time, keep it in a warm room no less than 2 hours before

plugging into the mains;

the ventilation should not be impeded by covering the ventilation openings with items, such as newspapers, table-cloths, curtains;

mount the modulator in vertical position with power supply located on the left;

from top, front and bottom of installed modulator must be at least 10 cm free space.

4 - RF OUT - RF signal output connector (F type)

5 - RF IN - RF signal input connector (F type)

6 - RF OUT - RF output signal level regulator

7 - two-digit LED display

8 - POWER - power indicator

9 - screwdriver

10 - power cord

11 - AUDIO - sound subcarrier deviation regulator (for MT47 only)

Figure 1.

TV MODULATORS MT47, MT57

Do not connect TV antennas to modulator RF IN connector directly. If you intend to combine TV signals of antennas

and the modulator, plug in booster with output-to-input isolation ≥20 dB between antenna output and RF IN connector.

DEFAULT SETTINGS

CHANGING OF SETTINGS

1. normal: sets after plug in;

2. setting: to enter the setting mode press and hold “-“ and “+” buttons simultaneously for 1 second, to exit setting mode

press and hold “-“ and “+” buttons simultaneously for 1 second.

Select of necessary to change parameter by pressing button “-“ and set necessary mode by pressing “+” button.

To revert to normal operation, repeat above procedure. "UL" will briey be displayed. The symbol "LO" appears, if you try to

change settings in locked mode.

SOUND SUBCARRIER DEVIATION SETTING

MT47: When input signal level is from 340 mV to 775 mV in both audio inputs, use a regulator (gure 1, position 11) to set

775 mV in both audio inputs.

MT57: The factory set sound subcarier deviation is ±50 kHz for an input signal 1 kHz/775 mV in both audio inputs

(Preset 0). Use software control for audio deviation regulation ±6 dB (see table 13).

OUTPUT SIGNAL LEVEL ADJUSTMENT

frequency range 45-84 MHz, 170-300 MHz, 470-862 MHz

4

5

i6

Table 9