Standard C828M - Antenna and Coaxial Gable

15. Anteima and Coaxial Cables
The Performance of your C828M depends on the quality of antenna and coaxial
cables. Pay attention to the following when you purchase your antenna and coaxial
cables.
Antenna:
1. Use the antenna having a matched impedance of 50 ohms.
2. Install the antenna as high as possible. Roof top is recommended for installa-
tion fer mobile Station use.
3. Use the antenna of high Performance.
Coaxial Cable:
1. Use the coaxial cable having a matched impedance of 50 ohms. Do not use
3C-2V, 5C-2V, etc., because they are rated at 75 ohms of impedance.
2. The coaxial cable should be preferably as large as possible in size.
If the cable length is less than 5m, use RG-58U, 5D-2V, etc.
If the cable length is longer than 5m, use RG-8U, 8D-2V, 10D-2V, etc.
See Fig. 15-1 below.
50000
30000
20000
10000
500 <-
300 *-
10 20 30 50 100 200 300 500 1000
(reqoencyl MHi)
Figure 15-1
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