Maxon MODMAX MM-6280IND Instrukcja Użytkownika Pobierz pdf (Strona 24)

Kingfisher PLUS+ Installation Manual 2.6

www.cse-semaphore.com/mykingfisher

Page 24

11.1 Antenna Cable Selection And Installation

Recommendations:

 Only use RG58 within an enclosure or within a building and if the cable run is less than 5 metres.

The cable is too fragile and the cable loss is too high for outside longer cable runs.

 Typically use RG213 up to 10 metres. This suits 6 metre water pipes that are commonly used for

antenna masts.

 After 10 metres it becomes a question of how much signal loss can be tolerated. LDF4 or LDF5

have lower signal loss per metre as listed below.

 Minimise the number of connections in the cable run – connections have a great deal of loss.

Loss per m of coax (@450MHZ)

Loss per m of coax (@900MHZ):

RG58

0.44 dB

RG58

0.60 dB (Do not use!)

RG213

0.16 dB

RG213

0.24 dB

LDF4

0.05 dB

LDF4

0.07 dB

LDF5

0.03 dB

LDF5

0.04 dB

11.2 How To Assemble Antenna Connectors

The following instructions apply to all three connectors:

1. Place clamp nut and plain gasket over cable.

2. Trim outer sheath from cable to dimension shown.

3. Fold back braid and insert ferrule to trap braid between outer sheath and ferrule.

4. Trim off surplus braid.

5. Trim dielectric to dimension shown, and check that exposed centre conductor length is as

specified.

6. Tin centre conductor.

7. Slide rear insulator over dielectric to butt against ferrule.

8. Mount contact (male for plugs, female for jacks) over centre conductor with shoulder pressed

against rear insulator.

9. Hold cable and contact firmly together, and solder.

10. Slide plain gasket and clamp nut up to ferrule, trapping braid.

11. Fit front insulator over contact to butt against rear insulator.

12. Press sub-assembly into body as far as possible and engage clamp nut.

13. Holding body and cable rigid, tighten clamp nut to compress plain gasket and retain cable.

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