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| Delta Repeater | |
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| Delta (64N04.92', 145W39.09', elevation 421 meters)
near Delta on Alaska Highway Installed 7 September 1996 by KL7XO, NL7XH & NL7HW Moved to Canyon Creek spring 1999 |
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Left: NL7HW's Repeater Site.
Right:The Tower. KL7KC antennas are 70' up. |
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Left: More of the antennae.
Right:NL7HW's Repeater Site. |
| 224 MHz Link - Path Profile | |
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Above: Path profile, Ester Dome to Delta. (already loaded) |
| Left: Map showing path between Delta and Ester Dome
BIG FILE: 527x1637 pixels, 335K bytes not yet loaded. |
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| 224 MHz Link - Path Loss Calculation | ||||
|---|---|---|---|---|
| Ester Dome to Delta | Delta to Ester Dome | |||
| Elevation antenna A (m) | 720 | Ester Dome | 720 | Ester Dome |
| Elevation antenna B (m) | 421 | Delta | 421 | Delta |
| Elevation obstruction (m) | 609 | RED | 609 | RED |
| Distance A to B (km) | 142 | Ester Dome to Delta | 142 | Ester Dome to Delta |
| Distance A to obstruction (km) | 89 | Ester Dome to RED | 53 | Delta to RED |
| frequency (MHz) | 224 | 224 | ||
| Theta (rad) | 0.01 | 0.01 | ||
| V | 2.38 | 2.38 | ||
| defraction loss (dB) | 20.30 | RED | 20.30 | RED |
| free space loss (dB) | 122.54 | Ester Dome to Delta | 122.54 | Delta to Ester Dome |
| TOTAL PATH LOSS (dB) | 142.84 | defraction + free space | 142.84 | defraction + free space |
| 224 MHz Link - Fade Margin Calculation | ||||
|---|---|---|---|---|
| Ester Dome to Delta | Delta to Ester Dome | |||
| Tx power (watts) | 40.00 | Ester Dome | 20.00 | Delta |
| Tx power (dBm) | 46.02 | Ester Dome | 43.01 | Delta |
| tx coax (dB) | -1.00 | -2.80 | 80'*3.5dB/100' | |
| tx ant gain (dBi) | 5.15 | AEA Isople * | 9.00 | 7 ele KLM |
| rx ant gain (dBi) | 9.00 | 7 ele KLM | 7.20 | Cushcraft 224WB |
| rx coax (dB) | -2.80 | 80'*3.5dB/100' | -1.00 | |
| system gain (dBm) | 56.37 | 55.41 | ||
| TOTAL PATH LOSS (dB) | 142.84 | from above | 142.84 | from above |
| rx sens (dBm) | -110.00 | (20dB S+N/N) | -110.00 | (20dB S+N/N) |
| FADE MARGIN (dB) | 23.53 | rx sens + system gain - path loss
10dB for 90% reliablity 20dB for 99% reliablity 30dB for 99.9% reliablity 40dB for 99.99% reliablity |
22.57 | |
* There is no published gain for the AEA Isopole antenna. A reasonable
estimate would be 3db more than a dipole. This is 5.15 dbi
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this page revised 20 November 2000 by:
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