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DSB / VSB MODULATORS

MHM Modulators shown here running a
'video on demand' hotel network.
 
If either a single channel or multiple channels are required to be modulated, a number of VSB and DSB solutions are available for all applications. These highly specified, cost effective modulators include both Australian and New Zealand software channel plans and may be programmed on-site, due to their user friendly features.
 
MODEL
BAND
FREQUECY RANGE
CURRENT
MODULATION TYPE
MHM121
VHF 1
44-72MHz
280mA
VSB
MHM131
VHF 1
44-72MHz
600mA
VSB
(3 Ch. Unit)
MHM321
VHF 3
136-300MHz
280mA
VSB
MHM341
VHF 3
136-300MHz
950mA
VSB
MHM401
Hyper
300-470MHz
220mA
VSB
MHM441
Hyper
300-470MHz
750mA
VSB
MHM503
UHF
470-862MHz
175mA
DSB
MHM543
UHF
470-862MHz
400mA
DSB
MHM521
UHF
470-862MHz
250mA
VSB
MHM541
UHF
470-862MHz
850mA
VSB
 
Output  
Channels  
   VHF 1: Aus. 0,1, 2 N.Z. 1, 2, 3
 VHF 3: Aus. 5A-12 N.Z. 4-11 / S7-S20
 Hyper: S21-S44 (7 MHz), S21-S41 (8MHz)
 UHF: Aus. 28-69 N.Z. 21-69
 
•   Multi-standard programmable for Australian, New Zealand and European Channels.
•   Push Button on-site tuning for all models including 7 & 8 channel bandwidths.

MHM321/401/503
 
All 3 and 4 channel units are mounted in a single housing with the installation base attached and included in the modulator price.
 

MHM131/441
 
NOTE:
The desired application of Teleste’s MHE headend signal process system is to balance, equalise and combine all signals at a level of 75dBuV for input to a quality launch amplifier.
Spurious attenuation is better than 60dBc
•

Suitable for multi channel use like MATV, SMATV networks.

•

Fulfils CATV standard.

•

Superior picture quality provided by higher carrier to spurious margin.

 
Operating temperature range is -10...+55°C
•

Reliable function in harsh conditions PLL type audio sub carrier oscillator.

•

Provides accurate frequency in entire operating temperature range and the modulator lifetime.

•

Typical tolerance better than 1 kHz.

 
Product range includes VSB type modulators
•

Double signal transmission capability compared to simple DSB modulators.

•

Better signal quality by using 'SAW' filter and 'IF' technique.

 
Video and audio level LED indicators
• Provides accurate and easy level adjustments.
• Audio Sub Carrier Level adjustable between -10dB and -20dB relative to the vision carrier.
 
CE approved
• High level protection against electric field discharges.
• Shielded construction.