User's Manual

38 MDS TransNET I/O Guide MDS 05-2708A01, Rev. A
Primary Power: 13.8 Vdc (10.5–30 Vdc range)*
* Units shipped prior to the year 2000 may be
configured for 25 Vdc maximum DC input.
Supply Current (typical):
Transmit: MDS TransNET 900
™: 400 mA @ 13.8 Vdc
Receive: MDS TransNET 900
™: 125 mA @ 13.8 Vdc
Sleep Mode: <5 mA @ 13.8 Vdc
Size (excluding mtg. hardware):
Enclosed Version: 5.30" x 3.50” x 1.40"
135 x 89 x 36 mm
: Board Version: 4.00"W x 3.25 ” x 0.50"
: 102 x 83 x 13 mm
Case: Die-cast aluminum
Pending Approvals: • FCC Part 15.247
• Industry Canada RSS-210 and RSS-139
• ETSI ETS 300 328
• UL/FM Class 1, Div. 2; Groups A, B, C and D
hazardous locations
• UL Listed
• CE Mark
• Contact MDS for information on availability and
governmental approvals in other countries
DATA CHARACTERISTICS
Data Interface: TTL/RS-232/RS-485
Interface Connector: DB-9 female
Data Rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600,
115200 bps asynchronous
Data Latency: <5 ms typical (buffer off)
Byte Length: 10 or 11 bits
Maximum Data Transmission: Continuous up to 115200 bps
RF CHARACTERISTICS
TRANSMITTER:
Power Output
(at antenna
connector): MDS TransNET 900™: 0.1 to 1.0 watt (+20 dBm to
+30 dBm) ±1.0 dB, set by user
Duty Cycle: Continuous
Modulation Type: Binary CPFSK
Output Impedance: 50 Ohms
Spurious: –60 dBc
Harmonics: –80 dBc
RECEIVER
Type: Double conversion superheterodyne
Bit-Error Rate: MDS TransNET 900
™: Less than 1x10
-
6
at –105
dBm
Intermodulation: MDS TransNET 900
™: 59 dB minimum (EIA)
Desensitization: MDS TransNET 900
™: 75 dB
Spurious: 70 dB minimum
Bandwidth: MDS TransNET 900
™: 200 KHz
Interference Ratio
(BER degraded by 10
-1
): Co-channel:–10 dB
Adjacent channel:+30 dB
Two channels away:+50 dB
Three channels away:+60 dB
Time Required to Synchronize
with Master Radio: Less than 10 seconds (typical)