B&B Electronics ZXT9-MB2A-KIT - Manual - Manual (Page 20)

Document Number: ZXTxRM-5110m
Page
20
3.7 Antenna Cables
If you decide to use one of the optional antennas, you will need to select the appropriate cable and
connector. It is important to select a cable that matches the radio’s impedance. An impedance
mismatch will cause the radio link to become inefficient and could damage the radio. Selecting the
incorrect cable could also cause significant signal loss. A rule of thumb is for every 3 dB of loss, your
system will lose one half the output power emitted from the radio.
We offer three basic cable types. LMR100, LMR195, and LMR400. LMR400 cable offers lower loss
but is thicker and more difficult to work with. LMR100 is thin and easy to work with, but has a larger
loss. It is recommended that you use the shortest possible cable run in your application.
Cable Type 900 MHz Loss Per 100 ft 2.4 GHz Loss Per 100 ft Diameter
LMR-100 22.8 dB 38.9 dB 0.110 in
LMR-195 11.5 dB 19.0 dB 0.195 in
LMR-400 3.9 dB 6.8 dB 0.405 in
Figure 3-13 LMR400 Cable Cross Section
Figure 3-14 LMR195 Cable Cross Section
Figure 3-15 LMR100 Cable Cross Section