Portsdown 2018 Band Switching
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| Band | Freq Range | VCO Filter Drive MSB LSB |
Tvtr Line | VCO Filter Needs MSB LSB |
|---|---|---|---|---|
| 71 MHz | < 100 MHz | 0 0 | 0 | 0 0 |
| 146 Mhz | 100 - 250 MHz | 0 1 | 0 | 0 1 |
| 437 MHz | 250 - 950 MHz | 1 0 | 0 | 1 0 |
| 1255 MHz | 950 - 2000 MHz | 1 1 | 0 | 1 1 |
| 2400 MHz | > 2000 MHz | 1 1 | 0 | 1 1 |
| Tvtr 1 | Any | 0 0 | 1 | Set by user |
| Tvtr 2 | Any | 0 1 | 1 | Set by user |
| Tvtr 3 | Any | 1 0 | 1 | Set by user |
| Tvtr 4 | Any | 1 1 | 1 | Set by user |