Technical Manual

Technical Manual Installation and Operation
© SPECTRA ENGINEERING 2022 Revision 1.0.0
21
5.3.2 General
Table 5-2 General Specifications
Parameter
Specification
MX940 Rack Size:
2RU Case
MX940 Overall Physical Size
89mm high, 330mm deep, 483mm wide
* Requires extra depth (40mm) for Fan operation.
Weight
<6 kg
Supply Voltage:
13.8V +/- 20%.
Power Consumption:
<500mA receive, typical 480mA. (TX VCO off).
<10A for 50W TX RF @13.8VDC.
Operating Temperature:
-30 to +60 C.
Individual Module Dimensions:
Main board W=153, L=221mm, H = 22mm.
PA W=78, L=300, H = 60mm.
Standard LED indicators:
PWR, TX A, TX B, RX A, RX B, DIGITAL,
ANALOG, REPEATER, LINK, ALARMS
SEE Table 1-1 LED Functions
Frequency Range:
Coverage 148-520 MHz , Model dependent.
Synthesis Method:
Non mixing PLL
Fractional N synthesiser.
Modulation:
DMR voice and data, Direct FM, two point
method,
+/-2.5 kHz narrow band, +/- 5 kHz wide band
Channel Spacing:
25 kHz or 12.5 kHz, software selectable.
Synthesiser Step Size:
5 kHz or 6.25 kHz.
Channels:
127 Software selectable.