FMT615C BRINGS FM BAND RADIO PROGRAMMING TO THE CABLE TV INDUSTRY
PMS610 FM SYSTEMS Mainframe
The FMT615C is equipped to accept audio and modulate the program to the 88-108 MHz Stereo Broadcast Band. The audio input can be true stereo (separate Left and Right channels), mono, or synthesized (within the FMT615C) to stereo, as selected by a field-programmable jumper jack inside the unit. In addition to the FM 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 TV audio modulator.
The RF output frequency of these units, like other FM SYSTEMS, INC. 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 Broadcast Band. Other frequencies outside the 88-108 MHz Band are available upon special request.
SPECIFICATIONS
OVERALL PERFORMANCE SPECIFICATION
Deviation (100%)75KHz peak, 10% (+/-7.5KHz)@ 19KHz
Frequency Response20-15000 Hz +/-0.5dB
Pre-emphasis75 microseconds
Total Harmonic Distortion0.5% Maximum
Stereo Separation40 dB @ 1KHz, 30 dB @ 15KHz
Signal to Noise Ratio70 dB Minimum
AUDIO INPUT
FormatTrue Stereo or Synthesized Stereo
Level (100%)-10 dBm to +18 dBm, Adjustable
ImpedanceBalanced Bridging (50K Ohms)
IndicatorFront Panel VU Meter
Connectors6 Position Screw Terminal
STEREO GENERATOR
FormatStandard Stereo Multiplex (19KHz pilot)
Synthesizer TypeDifferential Phase Rotation
RF OUTPUT
Frequency (FM Band) 88.1-107.9 MHz Other bands available
Stability20 PPM, +/-1 KHz Typical
Level+20 to +50 dBmV, Adjustable
ImpedanceDirectional coupler loop-through 75 Ohm
ConnectorsF Type (female)
Harmonic Distortion60 dB Below Carrier Level
AUDIO OUTPUTS
Composite Stereo3.5 Vpp (F female) Connector
Mono+10 dBm 75 microseconds (RCA output)
MECHANICAL
Power-24 VDC 130mA (PMS610)
MountingUses one space of three in the PMS610 Mainframe and power supply
For more information and pricing call: 800-235-6960.
