1-8 GENERAL MDS 05-2415A01, Rev. A
Receiver
Frequency Range: 350–512 MHz (Nominal)
Operating Bands— 350–370 MHz, 370–390 MHz, 390–410 MHz,
any one of eight: 406–430 MHz, 430–450 MHz, 450–470 MHz,
470–490 MHz, and 490–512 MHz
Frequency Programming: Programmable in 6.25 kHz increments to any
channel pair in radio operating sub-band.
Type: Double Conversion Superheterodyne
Frequency Stability: ±0.00015% (1.5 PPM) –30° to +60° C,
For All Models
Sensitivity for Analog Models: 12 dB SINAD at –117 dBm (0.3 µV)
(at ANTENNA connector) w/de-emphasis OFF
12 dB SINAD at –119 dBm (0.25 µV)
w/de-emphasis ON
Bit Error Rates: Analog/AFSK at 1200 bps:
BER 1x10
–6
at –110 dBm
Digital/FSK at 4800 bps:
BER 1x10
–6
at –110 dBm
Digital/FSK at 9600 bps:
BER 1x10
–6
at –108 dBm
Intermodulation: 75 dB Minimum (EIA)
IF Selectivity: 100 dB minimum at Adjacent Channel
(± 25 kHz, one generator method, 20 dB
quieting)
Desensitization: 70 dB minimum (EIA) on 25 kHz channels
65 dB minimum (EIA) on 12.5 kHz channels
Spurious and Image Rejection: 85 dB Minimum
Analog Audio Output Characteristics—
Frequency Response (Refer. to 1 kHz): Model 4310—Basic Transceiver:
Filtered, +1, –3 dB, 50 – 3000 Hz
Model 4310—with VOX Board:
Filtered, +1, –3 dB, 50 – 3000 Hz
Unfiltered, +1, –3 dB, 50 – 4500 Hz
Model 4350:
Filtered, +1, –3 dB, 300 – 3000 Hz
Level: Adjustable, – 20 to + 5 dBm
Model 4310: 600 Ohms, Unbalanced
Model 4350/55: 600 Ohms, Balanced
Harmonic Distortion: < 3%, All Models, Measured w/de-emphasis
RF Channel Bandwidth: 12.5 kHz (25 kHz compatible)
Received Signal Strength Indicator (RSSI): Built-in, Range: –120 dBm to –60 dBm
Squelch Opening Time: 2 ms
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