1-800-401-2474 | support@airnavsystems.com
Forum| About| Support| Contact
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
 


Author Topic: External antena instalation  (Read 744 times)

0 Members and 1 Guest are viewing this topic.

CarlosAbreu

  • Sr. Member
  • ****
  • Posts: 457
  • The sky is not the limit
External antena instalation
« on: June 03, 2017, 06:58:49 pm »
Hi List

Due to house move I installed my external amplified Wimo antena in the roof, however I don't need 5m of from a total of my 20m ecoflex 10" cable. I have rolled it with care, I think there's no problem with a loss of signal however I would like to hear from you about this.

May I keep this or I must unroll the cable, please advise.

In the old local I picked more flight because was higher and near LPPT (with visual contact), now as I'm in a lower place and more distant the flight tracking is less but I still keep around near 30 flights in peak hours.

Brgds
CA
Station: PGANRB100514
Software Version: 6.01.001
Antenna: Wimo GP-1090 (AS-1090 / BT-1090)
Cable: Ecoflex 10" (20m)


neroon79

  • Hero Member
  • *****
  • Posts: 4389
Re: External antena instalation
« Reply #1 on: June 03, 2017, 08:19:20 pm »
Hello Carlos,

As long as you keep the diameter of the cable roll-up big enough there shall be no significant increase of signal loss caused by the roll-up.

Problems will occur as soon as the actual bending radius is below the minimum bending radius (usually 5 to 10 times of cable diameter). In that case the cable can be damaged in terms of its geometry between inner and outer conductor resulting in a change of its wave impedance and an increase of its attenuation. Both reduces signal quality and strength and therefore reception range and airframe count.

For 10mm cable diameter the minimum bending radius (for 90° turn) would be 50mm to 100mm. The minimum roll-up diameter (360° turn ) is higher than the 90° bending diameter an shall be at least 300mm. From own experience I would advice a minimum roll-up diameter of about 500mm (20'')  to be ensure cable health.

Ingo
« Last Edit: June 03, 2017, 08:21:42 pm by neroon79 »
Greetings from northern Germany, Ingo
11.75nm ESE of EDDV

SW: ANRB v5.00.072/6.00.000 on WIN10 64Bit Pro&Home
HW:
Antenna: outside WiMo GP-1090
AMP: Kuhne electronic KU LNA 1090 A TM
Cable: 20m of ECOFLEX 15+
Asus P53E (BIZ-Notebook) 24/7 op.
Quad Core PC with 26"+24" Screen

CarlosAbreu

  • Sr. Member
  • ****
  • Posts: 457
  • The sky is not the limit
Re: External antena instalation
« Reply #2 on: June 03, 2017, 10:25:29 pm »
Hi Ingo

Thank you very much for your detailled explanation.

I checked the minimum 360º cable turn and it's 200mm, so tomorrow with daylight I'm going to unroll the cable and keep it stretched behind furniture, it seems to be the best option.

After that I compare data received and keep you informed.

Have a nice Sunday.

Brgds
CA
Station: PGANRB100514
Software Version: 6.01.001
Antenna: Wimo GP-1090 (AS-1090 / BT-1090)
Cable: Ecoflex 10" (20m)


CarlosAbreu

  • Sr. Member
  • ****
  • Posts: 457
  • The sky is not the limit
Re: External antena instalation
« Reply #3 on: June 04, 2017, 06:47:12 pm »
Hello Ingo

Cable changes were made early mornming. I unroll all excessive cable and just rool 360º 2m with a 400mm diameter. Due to furniture layot I could't extend it more and it was impossible to roll up until 500mm. However I roll it with carefull and without any pressure, it seems good to me.

During test, data receiveid is the same range in peak hours however it seems there is a little improvement in other short periods but as today is Sunday and June is the begining of vacation period I could check some unusuall charter flights specially from LPPT and LPPR, I'm not sure about this data received so I'll check in the following days in order to get a conclusive reply.

One more time thanks for your advise.

Brgds
CA



Station: PGANRB100514
Software Version: 6.01.001
Antenna: Wimo GP-1090 (AS-1090 / BT-1090)
Cable: Ecoflex 10" (20m)