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FM SYSTEMS, INC Mainframe

FMT615C Stereo Multiplex Transmitter

$1,225.00

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Part Number: FMT615C
Title: Stereo Multiplex Transmitter
Category: Multiplex-Stereo
Industry: TV/Radio Broadcast, CATV Cable Industry

The FMT615C is equipped to accept audio and modulate the program to the 88-108 MHz F,M. stereo broadcast band. The audio may be true stereo (separate Left and Right channels) or mono, or synthesized (within the FMT615C) to stereo, as selected by a field-programmable jumper jack within the unit.

Product Description

Stereo Multiplex Transmitter
Download Specifications
Click here to download the manual in Word 6.0 format. Download Manual
Click here to download the manual in Word 6.0 format. Download Related Article

Part Number: FMT615C
Title: Stereo Multiplex Transmitter
Category: Multiplex-Stereo
Industry: TV/Radio Broadcast, CATV Cable Industry

Description:

The FMT615C is equipped to accept audio and modulate the program to the 88-108 MHz F,M. stereo broadcast band. The audio may be true stereo (separate Left and Right channels) or mono, or synthesized (within the FMT615C) to stereo, as selected by a field-programmable jumper jack within the unit. In addition to the F.M. band output, there is a composite stereo audio output to feed an additional microwave modulator to deliver the stereo program to a remote cable system. There is also a mono output to feed audio to the T.V. audio modulator.

The RF output frequency of these units, like other F M Systems products, is adjustable in the field without changing crystals. This state-of-the-art design uses a master crystal oscillator and a programmable phase-lock-loop (PLL) system to precisely set the output to any standard frequency in the FM Broad- cast Band. Other frequencies outside the 88-108 MHz Band are available upon special request.

 

OVERALL PERFORMANCE SPECIFICATION
Deviation (100%) +75 KHz peak; 10% (+7.5 KHz) 19 KHz pilot
Frequency Response 20-15,000 Hz +0.5 dB
Pre-emphasis 75 microseconds
Total Harmonic Distortion <0.5%
Stereo Separation > 40 dB at 1000 Hz; > 30 dB at 15KHz
Signal-to-Noise > 70 dB
AUDIO INPUT SPECIFICATION
Format True stereo or internally synthesized stereo from mono (field selectable)
Level (100% Modulation) -10 dBm to +18 dBm, adjustable
Impedance Balanced, bridging (50,000 ohms)
Indicator “VU” meter
Connectors Screw terminals
STEREO GENERATOR SPECIFICATION
Format Standard stereo multiplex with 19 KHz pilot
Synthesizer Type Differential phase rotation
R.F. OUTPUT SPECIFICATION
Frequency (FM or A-1 8 A-2 band) 88.1 to 107.9 MHz or 108.1 to 119.9 MHz agile in 0.1 MHz steps
Other Frequency Bands Available upon special request
Stability 20 PPM; +1 KHz typical
Level +20 to +50 dBmV, adjustable
Impedance Directional coupler loop-thru (bridging) on 75 ohm line, “F” In and Out connectors.
Harmonic Output and 3rd Order Intermodulation > 60 dB below +50 dBmV
AUDIO OUTPUTS SPECIFICATION
Composite Stereo 3.5 V P-P into 600 ohms, “F” connector
Mono +10 dBm into 600 ohms, 75 microsecond de-emphasis, “RCA PHONO” connector
REMOTE CONTROL OPTION SPECIFICATION
True Stereo Input Screw terminal pulled to +5V by 10K ohms (+4 to +6V useable)
Stereo Synthesizer On Control terminal grounded externally (-1 to +1V useable)
POWER REQUIREMENT -24V (-21 to -33V), 110 mA
SIZE AND MOUNTING Requires 1/3 F M Systems PMS600 main- frame/power supply, which fits standard 19″ wide rack, 1-3/4″ high, 10-1/4″ deep (remaining 2/3 PMS600 accommodates additional F M Systems 600 series modules)

Additional Information

Weight 3 lbs
Dimensions 12 x 12 x 6 in