MDS 05-3316A01, Rev. E MDS 4710B/9710B I/O Guide 35
Response Time: 5 ms
Max. FM modulation: ±2.5 kHz
RECEIVER
Type: Double conversion superheterodyne
Frequency Range: 380–512 MHz (MDS 4710B)
800–960 MHz (MDS 9710B)
(See Figure 4 on page 4 for hardware band limits)
Frequency Increments: 6.25 kHz or 5 kHz (Factory Configurable)
Frequency Stability: 1.5 ppm, –30 to +60 degrees Celsius
Sensitivity: 12 dB SINAD at –110 dBm
Spurious & Image Rejection: 85 dB minimum
Intermodulation
Response Rejection: 75 dB minimum per EIA specification
Selectivity: 65 dB minimum at adjacent channel
Bandwidth: 12.5 kHz
Desensitization: 65 dB minimum, 12.5 kHz channel
Bit-Error Rates: 1200 bps: 1 x 10–6 at –110 dBm
4800 bps: 1 x 10–6 at –110 dBm
9600 bps: 1 x 10–6 at –108 dBm
PRIMARY POWER
Voltage: 13.8 Vdc Nominal (10.5 to 16 Vdc)
TX Supply Current: 1.8 A nominal, 2.5 A maximum
RX Supply Current: 150 mA (less than 16 mA in Sleep mode)
Power Connector: 2-pin polarized locking connector
Circuit Protector: 4 Amp, Self-Resetting Fuse, Internal
(Remove Primary Power to Reset)
Reverse Polarity Protection: Diode across primary input
DATA INTERFACE
Signaling Standard: RS-232
Connector: DB-25 (shared with data port), RJ-11 (separate)
Data Interface Rates: Bell 202T (1200 bps) modem—up to 1200 bps
4800 bps modem—up to 4800 bps
9600 bps modem—9600 bps only
Data Latency: 10 milliseconds maximum
ENVIRONMENTAL
Humidity: 95% at 40 C
Temperature Range: –30 to 60 C
Weight: 3.5 pounds (1.6 kilograms)
Size: Refer to Figure 6.
Case: Die-cast aluminum
7.2 Helical Filter Adjustment
If the receive frequency of the radio is changed more than 5 MHz, the
helical filters should be adjusted for maximum received signal strength
indication (RSSI). To adjust the filters, proceed as follows:
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