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:
