howto:xband
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howto:xband [2019/02/17 13:04] – [Repeater Extender] ve7hzf | howto:xband [2020/03/12 10:01] – [Note] va7fi | ||
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A crossband repeater is different from a regular repeater in two important ways: | A crossband repeater is different from a regular repeater in two important ways: | ||
- | * Where as a regular repeater uses the same band with a small offset between the tx and rx frequencies (600kHz | + | * Where as a regular repeater uses the same band with a small offset between the tx and rx frequencies (600 kHz for VHF and 5 MHz for UHF), a crossband repeater uses two frequencies on different bands (one on VHF and the other on UHF for example). |
* Where as a regular repeater always listens to the same frequency (the input of the repeater) and always transmits on the other (the output), a crossband repeater transmits on one frequency whatever it hears on the other, whichever it hears first. | * Where as a regular repeater always listens to the same frequency (the input of the repeater) and always transmits on the other (the output), a crossband repeater transmits on one frequency whatever it hears on the other, whichever it hears first. | ||
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===== Repeater Extender ===== | ===== Repeater Extender ===== | ||
- | This is a scheme I use often at home with my base station in crossband mode: I tune one receiver to our local repeater, and the other to a simplex UHF frequency. | + | This is a scheme I use often at home with my base station in crossband mode: I tune one receiver to our local repeater, and the other to a simplex UHF frequency. |
{{ : | {{ : | ||
- | * Unit A transmits and receives on 446.100 | + | * Unit A transmits and receives on 446.100 |
- | * The crossband repeater hears 446.100 and re-transmits it on 147.**8**20 (the input of the repeater). | + | * The crossband repeater hears 446.100 |
* The repeater hears 147.**8**20 and repeaters it on 147.**2**20 (its output) | * The repeater hears 147.**8**20 and repeaters it on 147.**2**20 (its output) | ||
* Unit B receives 147.**2**20 and replies on 147.**8**20, | * Unit B receives 147.**2**20 and replies on 147.**8**20, | ||
* The repeater re-transmits on 147.**2**20 | * The repeater re-transmits on 147.**2**20 | ||
- | * The crossband repeater hears 147.**2**20 and re-transmits it on 446.100 | + | * The crossband repeater hears 147.**2**20 and re-transmits it on 446.100. |
- | All that is needed to " | + | All that is needed to " |
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{{ : | {{ : | ||
The crossband repeater is set up with the input frequency of the repeater without the offset. | The crossband repeater is set up with the input frequency of the repeater without the offset. | ||
- | * Unit A transmits on and receives on 446.100 | + | * Unit A transmits on 446.100 |
* The crossband repeater hears 446.100 and re-transmits it on 147.**8**20 (the input of the repeater). | * The crossband repeater hears 446.100 and re-transmits it on 147.**8**20 (the input of the repeater). | ||
* The repeater hears 147.**8**20 and repeats it on 147.**2**20 (its output) | * The repeater hears 147.**8**20 and repeats it on 147.**2**20 (its output) | ||
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- | ===== Note ===== | + | |
- | The first draft of this page was copied over from [[https:// | + |
howto/xband.txt · Last modified: 2021/10/07 19:55 by va7fi