SRK ELECTRONICS MFTX100

GENERAL DESCRIPTION

MFTX100 - 100W AM Transmitter

photo SRK Electronics MFTX100

The MFTX100 is a 100W (carrier rest) solid state AM broadcast transmitter. It uses state-of-the-art digital modulation to deliver the most power efficient AM transmitter in the world.

With user adjustable output power and frequency, as well as comprehensive digital and analogue remote control, these units are extremely flexible.

For maximum ruggedness these transmitters offer extensive protection functionality including over SWR and over temperature. All alarms are self resetting, requiring no user intervention. This ensures that you stay on air even under the most difficult conditions.

photo SRK Electronics MFTX100

The MFTX100 includes a built in compressor/limiter with independently settable positive and negative peak limiting. Audio filtering can be applied as either a Butterworth or Bessel characteristic, or disabled completely. This represents a substantial cost saving over external audio processing. These transmitters are designed specifically to be driven from satellite or network audio sources.

An optional stereo encoder can be included to allow stereo broadcasting.

Day/night power control is included as standard and can be used to automatically switch between two preset power levels, dependent on the time of day.

An un-cluttered front panel offers easy and intuitive control and monitoring of all transmitter functions.

As with all of SRK’s products, these transmitters are designed and manufactured in Australia. They are supported by extensive documentation and are backed by a three year warranty.

Features

Rugged design
Fully digital modulation stage
High efficiency giving lower power bills
Designed specifically for MF NAS service
Optional C-QUAM stereo exciter
Power settable from 10 to 100% of maximum
Inbuilt compressor/limiter with independently programmable positive and negative peak limiting
Inbuilt audio low pass filter
Automatic day/night power switching
Digital and analogue remote control
125% peak positive modulation capable
Full metering of all internal parameters
Extensive protection features
User tuneable
Compact size
Lightweight
Manufactured an Australia
Three year warranty

TECHNICAL SPECIFICATIONS
Carrier rest power	10-100W
Positive modulation	125%
Audio response	10Hz - 10kHz -3dB
Audio input level	-10dBm to +10dBm
Frequency range	to be confirmed by manufacturer
Frequency stability	± 2ppm
Spurious and harmonics	-60dBc
THD	<0.5%
Hum and noise	Better than -60dB
Carrier shift	<0.5%
Supply voltage	170 -264VAC single phase 50-60Hz
Power factor (full power)	>0.94
Mains power at full power, 0% modulation	130W
Size	3U 300mm deep
Ambient temperature	0 - 50°C
Output connector	N type
Stereo format	C-QUAM (optional)
Mains input connector	IEC
Audio connector	3 pin XLR female
Cooling	Convection
VSWR	2:1 at full power
Audio input impedance	10K
Squarewave tilt	<1% @40Hz
Squarewave overshoot	<1% @400Hz, 50% modulation, Bessel filter
Audio filtering	None, 8th order Butterworth, 8th order Bessel selectable
Weight	TBA
Specifications may change without notice

TUBE COMPLEMENT
RF stages		AF stages and modulator
Number	Type	Number	Type
-	-	-	-

THIS TYPE OF TRANSMITTER IS INSTALLED IN THE FOLLOWING COUNTRIES
	ITU	Country	ITU	Country
	AUS	AUSTRALIA