Garmin GSR 56 Installation Manual - Page 20

Cable Installation

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3.4 Cable Installation 3.4.1 Coaxial Cable Installation 1. Choose the correct coax: RG-400/U has good characteristics for loss, size, and flexibility. The maximum cable loss between the GSR 56 and the satellite antenna (transmit or receive) is 3.0 dB. NOTE It is critical to the performance of the GSR 56 to keep the cable loss of the antenna cable to a minimum through the use of appropriate coax cable and proper connector installation. The total RF loss should not exceed 3.0 dB @ 1600 Mhz and the VSWR should be less than 1.4:1 when the cable is terminated in a 50 ohm load. 2. Trim the coaxial cable to the desired length and install TNC connectors at each end per the cabling instructions listed in Figure 3-2. For routing convenience, one end of the coaxial run can be terminated prior to installation. 3. With the GSR 56 receiver and antenna installed, route and clamp the coaxial cable in position. Secure cable in accordance with AC 43.13-1B, Chapter 11. Figure 3-2. TNC Connector Installation Page 3-4 Revision F GSR 56 Installation Manual 190-00836-00

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Page 3-4
GSR 56 Installation Manual
Revision F
190-00836-00
3.4
Cable Installation
3.4.1
Coaxial Cable Installation
1.
Choose the correct coax: RG-400/U has good characteristics for loss, size, and flexibility.
The
maximum cable loss between the GSR 56 and the satellite antenna (transmit or receive) is 3.0
dB.
NOTE
It is critical to the performance of the GSR 56 to keep the cable loss of the antenna cable
to a minimum through the use of appropriate coax cable and proper connector
installation.
The total RF loss should not exceed 3.0 dB @ 1600 Mhz and the VSWR
should be less than 1.4:1 when the cable is terminated in a 50 ohm load.
2.
Trim the coaxial cable to the desired length and install TNC connectors at each end per the
cabling instructions listed in Figure 3-2.
For routing convenience, one end of the coaxial run
can be terminated prior to installation.
3.
With the GSR 56 receiver and antenna installed, route and clamp the coaxial cable in position.
Secure cable in accordance with AC 43.13-1B, Chapter 11.
Figure 3-2.
TNC Connector Installation