C-Nav3050 User Guide

Add to my manuals
186 Pages

advertisement

C-Nav3050 User Guide | Manualzz

C-Nav3050 User Guide

Cable Route

When choosing a cable route for coaxial cable, consider the following:

Avoid running coaxial cable across, or parallel too power cables and high power RF cables.

Ensure that the cable route is free of sharp edges or places where the cable could become pinched, kinked, sliced or damaged in any way.

Determine the manufacturer’s specifications for the coaxial cable in use.

This should include: impedance

,

diameter, attenuation in dB / 100 ft and dB / 100 m at 1.575 GHz, velocity of propagation and the minimum bend radius of the cable.

Ensure the cable does not exceed the recommended minimum bend radius suggested by the manufacturer.

Ensure there is sufficient space at the cable entry point to the bulkhead as to not damage the connector during installation.

Measure the length of the cable route and refer to Table 28 for acceptable

cable lengths in relation to attenuation loss at the frequencies in use. The cable length between the antenna and C-Nav3050 should not exceed 7 dB loss at 1.575 GHz for optimum performance, though the system may tolerate up to 10 dB of cable loss with minimal performance. Lower elevation satellite tracking suffers the most with more than 7 dB insertion loss.

In-line amplifiers suitable for all GNSS frequencies may be used to increase the length of the antenna cable, but care should be exercised that tracking performance is not degraded due to multiple connections, noise from the amplifier, and possible ingress of moisture and dust to the in-line amplifier. In-line amplifier or splitter devices must pass DC power from the receiver to the antenna, or source the appropriate voltage and

current to the antenna (see Appendix B - Antenna Specifications

(Page

94 )). In-line amplifiers may also over-saturate the receiver front-end if

improperly used. Contact C-Nav Support for more information on available in-line amplifier solutions.

Coaxial Cable Installation

1. Prior to connecting the coaxial antenna cable to the antenna, ensure that all connections are free of dirt and other debris. Apply silicone grease to the connector threads and wipe off any excess, ensure not to get any lubricant on the contact. Connect the coaxial cable and hand-tighten firmly. Wrap the connection with self-amalgamating tape or another weather sealant such as Coax-seal® to prevent water ingress.

Revision

10

Page 71 of 186 6/8/2015

advertisement

Was this manual useful for you? Yes No
Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Related manuals

Download PDF

advertisement

Table of contents