{multithumb}

Multistandard twin modulators mt420 and mt420C – TV modulators are intended to form single side band signal of analogue TV in VHF and UHF bands. Each section is controlled separately and output channel of each section of the modulator is set independently of the other section.

The newest components and switched 7/8 MHz SAW IF filters provide excellent operating characteristics of output signal.

Modulators are powering from an external +12 V power supply with the ability to transfer power to other modulators by special flat cable.Modulators design provides big flaxibility under the installation.

Advantages:

two independent frequency agile vestigial sideband
TV modulators integrated into one module
LED display and push buttons control of internal microprocessor
non-volatile channel memory
PLL crystal stabilization of carriers frequency
adjustable RF output level and audio input level for every section
loop through RF combining
low level harmonics and intermodulation products
built-in test pattern generator
robust diecast housing
connectors:
video/audio input - RCA socket
RF - type F
screw terminal block for DC entry

Differences

mt420 VSB single-band modulator, standard B/G/D/K/I/L/Au
mt420C VSB single-band modulator, standard B/G/D/K/Au stereo A2

Installation example

sxema 420

Technical specifications:

Type		mt420	mt420C
TV standard pr		B/G/D/K/I/L/Au	B/G/D/K/Au stereo A2
Frequency range		110-862 MHz
Video input	frequency range	20 Hz - 6 MHz
	level/impedance	1 V ± 0,1 В/75 Ω
Audio input	frequency range	20 Hz - 15 kHz
	level/impedance	775 mV /10 kΩ
	level adjustment pr (dB)	-6 … +6 by 2 dB step
Rf output	level/impedance	90 dBmV/75 Ω
	level adjustment range	0 + -10 dB by 1 dB step
	Frequency range o RF combining (MHz)	47-2150
	DC pass through (A)	0.3
	Combining through loss Terr/SAT (dB)	1.5/2.5
	Return loss, dB	≥ 10
Sound subcarrier frequency, pr		5.5 MHz, 6.0 MHz, 6.5 MHz	stereo A2
Fine tuning range of video carrier frequency pr (MHz)		± 2.25 max by 0.25 step
IF bandwidth pr (MHz)		7/8
A/V ratio pr dB		12 / 16
S/N ratio, weighted dB		≥ 55
IMD2/IMD3 spurious level (dB)		< -60
Current consumption		12 V / 4,5A	12 V / 4,7
Operating temperature range °C		0 … +50
Dimentions (mm)		198 x 107 x 36
Weight (packed) kg		0.9

pr – software control

Power supply:

Type	GS15E-3P1J	DR-60-12
DC output	+12 V 1.25 A	+12 V 4.5 A
Mains voltage	100 V…240 V, ~ 50 Hz
Operating temperature range	0…+40 °C	-20…+50 °C
Dimentions/Weight(packed)	34x71x50 mm/0.18 kg	78x97x56 mm/0.4 kg

Twin single-band TV modulators TERRA mt420

Technical specifications:

Power supply: