Specifications

46
6.3 Wiring and Connections
The table below shows the attenuation on the VHF frequencies with different cable types:
Cable Type Attenuation @150
MHz (dB/100 m)
Diameter (mm) Weight (kg/100 m)
RG214
7
10.8
18.5
RG225
8
10.9
23.3
Example: A RG 214 cable with length of 40 meters will have an attenuation of 2.8 dB.
Please keep the cables as short as possible, and be aware that 3 dB losses mean only half the output
power. If you have a transmitter delivering 12.5 W, and you have 3 dB losses in the cable, only 6.25
Watts will be at the antenna.
6.3.1 Cable between MX535B Transponder and MX51x Display Unit
The cable connecting the MX535B Transponder and the MX51x Display unit is a double twisted-pair cable
with individual shielding. Connections to the MX51x can be done easily through the junction box terminals
as shown below for the MX512 and MX510 display models.
Figure 6.6 Wiring diagram between the Transponder and the MX512 Display Unit (port 5)
Figure 6.7 Wiring diagram between the Transponder and the MX510 Display Unit (port 2)