The complete frequency allocation for the Cobra RX680 includes 60 channels, as detailed in the manual.
Here is the full table:
| Channel Number | Frequency (MHz) | Power Output | Code System |
|---|---|---|---|
| 1 | 462.5625 | High | None |
| 2 | 462.5875 | High | None |
| 3 | 462.6125 | High | None |
| 4 | 462.6375 | High | None |
| 5 | 462.6625 | High | None |
| 6 | 462.6875 | High | None |
| 7 | 462.7125 | High | None |
| 8 | 467.5625 | Low | None |
| 9 | 467.5875 | Low | None |
| 10 | 467.6125 | Low | None |
| 11 | 467.6375 | Low | None |
| 12 | 467.6625 | Low | None |
| 13 | 467.6875 | Low | None |
| 14 | 467.7125 | Low | None |
| 15 | 462.5500 | High | None |
| 16 | 462.5750 | High | None |
| 17 | 462.6000 | High | None |
| 18 | 462.6250 | High | None |
| 19 | 462.6500 | High | None |
| 20 | 462.6750 | High | None |
| 21 | 462.7000 | High | None |
| 22 | 462.7250 | High | None |
| 23–60 | Repeats frequencies from above with assigned privacy codes (CTCSS and DCS) | High or Low | Various CTCSS/DCS Codes |
Notes
- Channels 1–22 include standard FRS and GMRS frequencies, with FRS channels operating at low power and GMRS at high power.
- Channels 23–60 use the same frequencies as channels 1–22 but incorporate privacy codes (CTCSS and DCS), providing more secure communication options.
- Certain channels operate exclusively on low power due to regulations, such as channels 8–14, 34–37, and 53–56.
For a more precise breakdown of CTCSS and DCS codes, refer to the programming section of the manual, as the privacy codes vary across channels.
What is CTCSS?
CTCSS stands for Continuous Tone-Coded Squelch System. It is a feature used in two-way radios to filter out unwanted transmissions on the same frequency. By adding a specific sub-audible tone (low-frequency tone) to a transmission, CTCSS allows only radios with the matching tone to hear the transmission, effectively creating private or “quiet” channels.
What is DCS?
DCS stands for Digital-Coded Squelch. It is a system used in two-way radios to filter transmissions on the same frequency by adding a digital code to the transmission. DCS works similarly to CTCSS (Continuous Tone-Coded Squelch System) but uses a digital signal instead of an analog tone, providing more options and improved interference resistance.
