OPERATING THROUGH REPEATERS
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2 | Compared to simplex communication, you can usually | REPEATER ACCESS |
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| transmit over much greater distances by using a repeater. | Most Amateur Radio voice repeaters use a separate | |||||||||
3 | Repeaters are typically located on a mountain top or other | ||||||||||
4 | elevated location. Often they operate at higher ERP | receive and transmit frequency. The transmit frequency | |||||||||
(Effective Radiated Power) than a typical station. This | may be higher or lower than the receive frequency but the | ||||||||||
5 | combination of elevation and high ERP allows | difference in frequencies will be a standard amount, or | |||||||||
| communications over considerable distances. | "standard split". You can set a separate receive and | |||||||||
6 | Repeaters are often installed and maintained by radio | transmit frequency by selecting the offset frequency and | |||||||||
7 | offset direction with respect to the receive frequency. | ||||||||||
clubs, sometimes with the cooperation of local businesses | |||||||||||
In addition, some repeaters may require the transceiver to | |||||||||||
8 | involved in the communications industry. During | ||||||||||
emergencies, repeater networks can be a valuable aid to | transmit a tone before the repeater can be used. To | ||||||||||
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9 | officials responsible for coordinating communications in a | transmit this required tone, activate the Tone function and | |||||||||
10 | community. | select a tone frequency. The required tone frequency | |||||||||
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| depends on the repeater you are accessing. |
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| Most repeater configurations fall into one of the following | |||||
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13 |
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| Offset |
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| Direction | VHF | UHF |
| UHF | ||
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| + | +600 kHz | +5 MHz |
| +1.6 MHz | |
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| – |
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| – (" ") | N/A | N/A |
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| TX: 144.73 MHz |
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| N/A: Not applicable |
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| TX tone: 88.5 Hz |
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| RX: 145.33 MHz |
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