projects:jimbob:frequency
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| projects:jimbob:frequency [2013/09/04 14:08] – kevwal | projects:jimbob:frequency [2013/09/04 14:26] (current) – kevwal | ||
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| + | ===== Frequency Ramblings===== | ||
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| Frequency range legally available is 434.04MHz - 434.79MHz according to IR2030. | Frequency range legally available is 434.04MHz - 434.79MHz according to IR2030. | ||
| Point in time analysis using SDR and external collinear: | Point in time analysis using SDR and external collinear: | ||
| - | 434.040MHz - Start of legal band | + | * 434.040MHz - Start of legal band |
| - | 434.046Mhz - Weak interference | + | |
| - | 434.075Mhz - NTX2 | + | |
| - | 434.078Mhz - Weak interference | + | |
| - | 434.099Mhz - Weak interference | + | |
| - | 434.110Mhz - Weak interference | + | |
| - | 434.112Mhz - Weak interference | + | |
| - | 434.121Mhz - Weak interference | + | |
| - | 434.127Mhz - Weak interference | + | |
| - | 434.169Mhz - Medium interference | + | * **434.150Mhz - Good Frequency? |
| - | 434.267Mhz - Weak interference | + | * 434.169Mhz - Medium interference |
| - | 434.320 to 434.330 - Strong interference | + | |
| - | 434.330Mhz - Weak interference | + | |
| - | 434.347Mhz - Weak interference | + | |
| - | 434.361Mhz - Weak interference | + | |
| - | 434.369 to 434.379 - Strong interference | + | |
| - | 434.375Mhz - Emergency Comms | + | |
| - | 434.392Mhz - Weak interference | + | |
| - | 434.475Mhz - Internet voice gateway, 25khz | + | |
| - | 434.500Mhz - Internet voice gateway, 25khz | + | * **434.412Mhz - Good Frequency? |
| - | 434.518Mhz - Weak interference | + | * 434.475Mhz - Internet voice gateway, 25khz |
| - | 434.525Mhz - Internet voice gateway, 25khz | + | * **434.487Mhz - Good Frequency? |
| - | 434.550Mhz - Weak interference | + | * 434.500Mhz - Internet voice gateway, 25khz |
| - | 434.581Mhz - Weak interference | + | * **434.512Mhz - Good Frequency? |
| - | 434.600Mhz - Repeater input, 25khz | + | * 434.518Mhz - Weak interference |
| - | 434.613Mhz - Weak interference | + | |
| - | 434.625Mhz - Repeater input, 25khz | + | |
| - | 434.650Mhz - NTX2 | + | * **434.562Mhz - Good Frequency? |
| - | 434.650Mhz - Repeater input, 25khz | + | * 434.581Mhz - Weak interference |
| - | 434.675Mhz - Repeater input, 25khz | + | |
| - | 434.700Mhz - Repeater input, 25khz | + | * **434.612Mhz - Good Frequency? |
| - | 434.725Mhz - Repeater input, 25khz | + | * 434.613Mhz - Weak interference |
| - | 434.750Mhz - Repeater input, 25khz | + | |
| - | 434.775Mhz - Repeater input, 25khz | + | |
| - | 434.790Mhz - End of legal band | + | |
| + | | ||
| + | * **434.687Mhz - Good Frequency? | ||
| + | * 434.700Mhz - Repeater input, 25khz | ||
| + | | ||
| + | * **434.737Mhz - Good Frequency? | ||
| + | * 434.750Mhz - Repeater input, 25khz | ||
| + | | ||
| + | | ||
| Thinking about frequency spacing, to be able to receive multiple transmissions with one dongle: | Thinking about frequency spacing, to be able to receive multiple transmissions with one dongle: | ||
| Line 45: | Line 56: | ||
| We want to restrict the spacing to the FunCUBE Dongle bandwidth of 192,000hz, 50khz plus drift fits easily within this bandwidth. | We want to restrict the spacing to the FunCUBE Dongle bandwidth of 192,000hz, 50khz plus drift fits easily within this bandwidth. | ||
| - | |||
projects/jimbob/frequency.1378303701.txt.gz · Last modified: 2013/09/04 14:08 by kevwal