Nelson TWIG handleiding

Handleiding

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970/ 70

Afdrukken

Je bekijkt pagina 46 van 70

t

46

Appendix A: Antenna Kits

Antenna factors for the best advantage and antenna kits:

The antenna is the main communication link. The range between the TD200 and the TWIGs

depends upon good antennas. An antenna’s power gain is a key value that describes the antenna’s

efciency. As a transmitting antenna, the value describes how well the antenna converts input power

into radio waves. As a receiving antenna, the value describes how well the antenna converts radio

waves arriving from a specied direction into electrical power. Antenna gain is usually expressed

in decibels, and these units are referred to as “decibels-isotropic” (dBi). For a given frequency, the

antenna’s effective area is proportional to the power gain. Due to reciprocity, the gain of any antenna

when receiving is equal to its gain when transmitting.

The Nelson Di-pole antenna is rated 2 dBi. The Omni antennas are rated 6 dBi (2.5x more). The

longest range is achieved using the Omni antenna. Note: Only the approved antennas can be used

for the TWIG network. Here are the kit part numbers:

12000-010 Omni with 10’ cable

12000-020 Omni with 20’ of cable

12000-030 Omni with 30’ of cable

12000-040 Omni with 40’ of cable

12000-050 Omni with 50’ of cable

12281 Di-pole articulating (no cable)

The only difference between these Omni antenna kits is the length of the co-axial antenna cable. The

length should be selected carefully because there is some signal degrading within the cable. Length

should not be any longer that needed but long enough that it easily connects. An appropriate length will

have enough that a small amount of extra cable can be looped to give room for making the connections.

The water proof seal tape must be used to keep moisture from entering the cable junctions.

Each Omni kit includes the following parts:

11818 Omni Antenna with u-bolts, +mount

11996-xxx N to N cable (10, 20, or 30’ long)

11865-xxx RP-SMA to N cable (10’ or 20’)

11998 Coax weatherproong tape

11997 Lightning Arrestor with mount

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970/ 70

Bekijk gratis de handleiding van Nelson TWIG, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.

Productinformatie

Andere merken in Niet gecategoriseerd