Originally posted by VE6CPP
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Last edited by abcd567; 2014-01-17, 20:48.
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Originally posted by VE6CPP View PostDo any of you know the MDS (Minimum Discernable Signal) for the conventional
ADS-B receiver?..........
VE6CPP
F-CYQL1
Right Click the above link and then select "save as" or "save link as" to download pdf documentLast edited by abcd567; 2014-01-18, 22:10.
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Originally posted by mickopla View PostI'm curious would there be any lose of range when using the 10 metre cable provided with FR24 equipment to connect antenna to receiver compared with the 5 metre cable?
Mike
For RG58 Cable
At 1000 Mhz, Loss in 10 m (30.5 ft) cable = 17.5dB x 30.5/100 = 5.1 dB
Using 5m will reduce loss by 2.55dB
For LMR400 Cable
At 1000 Mhz, Loss in 10 m (30.5 ft) cable = 4.3dB x 30.5/100 = 1.3 dB
Using 5m will reduce loss by 0.65dB
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Originally posted by abcd567 View PostIt depends on which cable is supplied by FR24. One of the following 2 is most likely:
For RG58 Cable
At 1000 Mhz, Loss in 10 m (30.5 ft) cable = 17.5dB x 30.5/100 = 5.1 dB
Using 5m will reduce loss by 2.55dB
For LMR400 Cable
At 1000 Mhz, Loss in 10 m (30.5 ft) cable = 4.3dB x 30.5/100 = 1.3 dB
Using 5m will reduce loss by 0.65dB
Mike
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The cable provided with the FR24 is h155 belden.
Velkoobchod s komponenty pro datové sítě. Kabely, konektory, zásuvky, datové sítě. Distributor firem Belden, Panduit, Hirschmann, Planet, 1583E, kabel Belden
h155 10 m Loss at 1000Mhz is 2.96 dB
LMR-400 10 m Loss at 1000MHz is 1.30 dB
This is why I went with LMR-400Last edited by 1090 MHz; 2014-01-25, 02:28.
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Originally posted by 1090 MHz View PostThe cable provided with the FR24 is h155 belden.
Velkoobchod s komponenty pro datové sítě. Kabely, konektory, zásuvky, datové sítě. Distributor firem Belden, Panduit, Hirschmann, Planet, 1583E, kabel Belden
h155 10 m Loss at 1000Mhz is 2.96 dB
LMR-400 10 m Loss at 1000MHz is 1.30 dB
This is why I went with LMR-400
By using LMR400 instead of H155, you reduced signal loss by 4.2dB**. You took a very wise decision to use LMR400.
**29.6dBx25m/100m - 13dBx25m/100m = 7.4dB - 3.2dB = 4.2dB
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Originally posted by abcd567 View PostYour mast is 60 feet (almost 20 meters) high, plus horizontal run of cable say 5 meters, your total cable length from antenna to receiver is about 25 meters.
By using LMR400 instead of H155, you reduced signal loss by 4.2dB**. You took a very wise decision to use LMR400.
**29.6dBx25m/100m - 13dBx25m/100m = 7.4dB - 3.2dB = 4.2dB
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Originally posted by 1090 MHz View PostThe cable provided with the FR24 is h155 belden.
Velkoobchod s komponenty pro datové sítě. Kabely, konektory, zásuvky, datové sítě. Distributor firem Belden, Panduit, Hirschmann, Planet, 1583E, kabel Belden
h155 10 m Loss at 1000Mhz is 2.96 dB
LMR-400 10 m Loss at 1000MHz is 1.30 dB
This is why I went with LMR-400
Also to shorten the h155 10m cable provided by FR24 would a crimping tool be required?
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Originally posted by mickopla View Post
Also to shorten the h155 10m cable provided by FR24 would a crimping tool be required?
Don't modify that cable. You agreed that it is still property of FR24.
I asked same question couple a months ago.For official support use Contact Form
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Originally posted by Amper View PostDon't modify that cable. You agreed that it is still property of FR24.
I asked same question couple a months ago.
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Originally posted by abcd567 View PostJust out of curiosity, what is the cost of LMR400 for say 25 meters length?
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