User's Manual
Table Of Contents
- System Description
- Introducing BreezeACCESS 900
- Cell Extender
- Subscriber Unit
- BreezeCONFIG( ACCESS
- Specifications
- Installing the Cell Extender
- Installing the SU-I Subscriber Unit
- Set-up and Initialization
- Aligning the Cell Extender’s SU-RA Antenna
- Aligning the SU-I Subscriber Unit’s Antenna
- Verifying Proper Operation
- Flexible Hopping Definition Mode
Chapter 2 - Installation
IF Cable
The SU-RA-2.4 Radio Unit is connected to the Interface Unit via an IF
cable carrying both signals and power. The IF frequency is 440 MHz.
The maximum permitted attenuation of the IF cable is 15dB at 440 MHz
and the maximum permitted DC resistance (the sum of the DC
resistance of the inner and outer conductors) is 1.5 ohms. This enables
a cable length of up to 30m when using the standard RG 58 cable.
If longer cables are required, a cable with lower attenuation and/or DC
resistance should be used.
Table 2-1
Table 2-1: IF Cables
Cable Type RG 58 RG 213 LMR 200 LMR 240 LMR 400
Maximum Cable
Length (m)
30 100 45 65 150
provides detailed information about common cables such as
the RG 58 and RG 213. If the spectral environment is polluted with
noise in the 440 MHz band, it is recommended that a higher quality
double-shielded cable, such as the LMR 200, LMR 240 and LMR 400,
be used. (These cables are manufactured by Times Communications).
If you are using coaxial cables other than those listed above, consult the
cable manufacturers’ specification to ensure that the cable's
attenuation at 440 MHz does not exceed 15dB, and its DC loss (center
conductor plus shield) does not exceed 1.5 ohms.
BreezeACCESSS 900 System Manual
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