CROWN FM30 Stereo Transmitter

  • Apr 01, 2016
  • radiorob
$4,995.00 CAD
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Classic CROWN FM Transmitter Line - FM Low Power Transmitters.  The FM30 is available in three configurations:  The "T" is a perfect choice for the lower-power broadcaster, with its built-in audio processor and stereo generator. 

  • Frequency agile from front panel
  • SWR metering from remote control
  • Ability to control output power from remote control
  • 3-year warranty 24-hour service support
  • Meets or exceeds all FCC\ INDCAN requirements

CROWN FM 30 TECHNICAL SPECIFICATIONS

Frequency Range 87 to 108MHz (Japanese frequency available 74-90MHz as an option) Front panel agile
RF Power 3 to 30 watts with front panel adjustment
RF Output Impedance 50 Ohms unbalanced
VSWR 1.7:1 Maximum with automatic foldback at higher VSWR
Frequency Stability Better than +/- 1KHz over operating temperature range
Modulation Type Direct Frequency Modulation of Carrier
Modulation Indication LED Indicators with Peak indicators
FM S/N Ratio (FM noise) Better than 60 dB (70 to 80 dB typical)
Asynchronous AM S/N Ratio Better than 50 dB referenced to 100% modulation @ 100 Hz, no de-emphasis.
Synchronous AM S/N Ratio Better than 50 dB with 100% modulation @ 100 Hz, no de-emphasis (typical >60dB)
RF Harmonics/Spurious Products Better than –65 dB (75 dB typical)
RF Bandwidth +/- 120 KHz, better than –35 dB; +/- 240 KHz better than –45 dB
Temperature 0 to 50 degrees C
Humidity 0 to 80% @ 20 degrees C (non-condensing)
Maximum Altitude 10,000 ft (3,000 m)
AC power 100 to 120 or 220 to 240 volts AC +/- 10%, 50 to 60 Hz
Power factor Greater than 97% (lagging)
DC Power 36 to 48 VDC (48V required for full output)
Power Consumption 100VA
RF Output connector Standard type N, 50 Ohm
Chassis dimensions 5.25 x 16.5 x 17.5 inches (13.4 x 41.9 x 44.5 cm) exclusive of rack mounts but inclusive of connectors
Weight 25 pounds (11.3 Kg) shipping weight = 33 Pounds (14.9 Kg)

Wide Band composite operation
Composite Inputs 1
Composite Input level 3.8 Vp-p for +/-75KHz deviation
Composite total harmonic distortion + noise < 0.05% from 50Hz to 15 Hz (0.03 typical)
Sub-carrier inputs 3
Sub-carrier input level 3.8 Vp-p for +/-75KHz deviation
Sub-carrier amplitude response +/-0.3 dB from 40Hz to 100KHz

Monaural operation w/ built in Audio Processor
Audio Input impedance 50 Kohms bridging, balanced
Audio Input level 3.8 Vp-p for +/-75KHz deviation
Audio Frequency response Conforms to 75uS pre-emphasis curve for +/- 0.25 dB from 50Hz to 15KHz
Pre-emphasis Selectable 50, 75 uS or flat

Stereo Operation w/ built in Audio Processor and Stereo Generator
Audio Input impedance 50 Kohms bridging, balanced
Audio Input level -10 dBm to +10 dBm selectable for 75KHz deviation @400Hz
Frequency response +/- 0.3 dB from 50Hz to 10KHz, +/- 1.0dB from 10Hz to 15KHZ
Total Harmonic distortion + Noise 0.4% or less @ 15KHz (0.2 typical)
Stereo Separation Better than 40 dB from 50Hz to 15KHz
Linear Cross Talk Main to sub and sub to main, -40 dB or better from 50 Hz to 15 KHz
38 KHz Sub-carrier suppression >60dB
Pilot Stability +/-.5 Hz @ 9% modulation

 

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