Re-broadcast FM receiver

• Fully microprocessor controlled

• Complete front-panel or remote programmability

of frequency

• Recommended for FM transponder site

• Very wide audio base-band

• Very flat MPX response

• Mains and 24Vdc Battery Power Supply

Options:

• Stereo Encoder/Decoder + Headphone Audio

Output

• IF output monitor

 

GENERAL SPECIFICATIONS

 

 

Mains Voltage Range 115 / 230 Vac (+10% -25%)

Battery Backup 24.0÷40.0V - 500A @ 24 V

Size 19" 2 U std. Rack.

Antenna connector N / 50 ohm

Monitor Connectors BNC

I/O Lines No field

RADIO FREQUENCY

 

 

Frequency range 87.5-108 MHz

Modulation FM 75 kHz peak dev. 180k F3E mono, 256kF3E stereo

Synthesis step size 100/10 kHz

Dynamic Selectivity >+10dB typ @ ΔF=300 kHz

>+35dB typ @ ΔF=500 kHz

>+45dB typ @ ΔF=1.0 MHz

Usable Input Level -87 ÷+-10dBm (10μV÷700mV)

Typical Sensivity (S/N=60dB) Sin= -87dBm (10μV) mono

Sin= -67dBm (100μV) stereo

Noise Figure <10 dB

Image freq. suppression >60 dB (70 typ.)

AM suppression >45 dB

IF monitor output 10.7 MHz/0dBm

AUDIO CHARACTERISTICS

 

 

Audio/Mpx Output Level -1.5÷+12dBm (0.5dB steps)

S/N Ratio (30÷20000Hz rms) >77 dB, 82 typ. Mono

>73 dB, 75 typ. Stereo

Modulation Distortion

@1kHz/ 100%dev. Mono≤0.1% (0.03% typ)

Stereo, 1ch≤0.30% (0.20% typ)

Stereo Cross-Talk <-45dB (100÷12000Hz)

Audio Frequency Response 20 Hz ÷ 15 kHz ±0.1dB

MPX Frequency Response 15 Hz ÷ 67 kHz ±0.1/-0.5dB