Page7 of 21
2.2 Thermal
It is important that the RDMS be kept within its specified operating range of -40°C to
+70°C. At maximum bit rates, the unit dissipates approximately 12 watts. At normal
ambient room temperatures, a small fan blowing across the top cover is adequate. Higher
ambient temperatures will require more airflow and/or a finned heat sink on the cover.
2.3 Electrical
The RDMS has three external connectors, an MDM-15 male for all baseband interfaces, a
female SMA connector for the RF input, and a second female SMA connector for an IF
output. Note that initial shipments of the RDMS did not include the IF output. The pin
numbering and wiring for the MDM-15 male connector is shown in Figure 3. MDM-15 Pin
Numbers.
Figure 3. MDM-15 Pin Numbers.
Pin
Signal
Description
1
Disconnected
Pin disconnected.
2
GND
Primary power return, 2 amps maximum. Internally tied to pins 3, 6, and 10.
3
Signal GND
Ground return for TTL clock and data signals. Internally tied to pins 2, 6, and
10.
4
Data Out
Primary 3.3 volt TTL data output for all modes.
5
Clock Out
Primary 3.3 volt TTL clock output for all modes.
6
232 Ground
Ground return for RS-232 control lines. Internally tied to pins 2, 3, and 10.
7
Demod Lock
Out
3.3 volt TTL lock detector output for all modes.
8
232 Tx Output RS-232 responses to host controller
9
+28VDC
Primary 28 VDC power to module, 0.7 amps maximum current drain.
10
GND
Secondary power return, 2 amps maximum. Internally tied to pins 2, 3, and 6.
11
Power ON
Power on reset pin. Temporarily grounding this pin is equivalent to power
cycling the module.
12
Data 2 Out
Secondary 3.3 volt TTL data output for all modes. This pin carries identical
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
