| To scan all three favourite channels, press 3CH then immediately press and hold |
| SCAN for at least 1.5 seconds. The radio goes into PSCAN mode; automatically |
| scanning the three favourite channels (and the priority channel once every 4 |
| seconds). The screen shows the SCAN symbol, channel band, and the channel |
| being scanned. |
| To scan all channels within a channel band, select a channel that is not a favourite |
| then press and hold SCAN for at least 1.5 seconds. The radio goes into ALL SCAN |
| mode, automatically scanning about 7 channels per second (and the priority |
| channel once every 4 seconds). See Section 2.3.7 for an example. |
| To lock out an“always busy”channel when in ALL SCAN mode, press SKIP when the |
| radio stops at that channel, An X appears for one second on the screen to indicate |
| a locked out channel and then scanning resumes. Note that it is not possible to skip |
| over the priority channel. See Section 2.3.8 for an example. |
| When a signal is received in either PSCAN or ALL SCAN mode, scanning stops at |
| that channel. The screen shows Rx and the signal strength. If the signal ceases for |
| more than 4 seconds, the scan restarts. |
| To cancel scanning, press SCAN again. Note that pressing 88/9 (the priority |
| channel) also cancels scanning. |
+ CH - | Channel Select. Also on the microphone. The current channel is shown on the |
| screen in big digits. |
| Press + or - repeatedly to step through the available channels one at a time, or |
| hold down to scroll rapidly through the available channels at about 7 channels per |
| second. See Appendix C for channel band frequencies. |
REJ | Noise Rejection. Press REJ to activate the noise blanker circuit and reduce noise |
| (e.g. from the engine spark plugs or alternator). The screen shows REJ to indicate |
| that the noise blanker circuit is on. See Section 2.3.4 for an example. |
LOC | Local Mode. Microphone only. Press to select Local mode. This reduces the receiver |
| sensitivity and noise. The screen shows LOC to indicate that Local mode is active. |
| Local mode can be useful in areas of high radio noise; for example, close to cities. |
| Local mode is not recommended for use in open sea conditions. |
| Press LOC again to return to normal sensitivity. |
BAT | Battery Readout. Press BAT to display the voltage of the battery supplying the |
| radio in big digits on the screen; e.g.12.6V is displayed as 12, then after 1 second, |
| the display changes to .60. This cycle is repeated twice then the radio returns you |
| to the most recent mode. See Section 2.3.5 for an example. |
SKIP | Lockout a Channel. You can use this only in ALL SCAN mode, if desired, to skip |
| over a channel that is always busy. |
| When the busy channel is displayed on the screen, press SKIP to lock it out. The |
| X symbol appears on the screen for one second by the channel number, then |
| scanning resumes. See Section 2.3.8 for an example. You can lock out a maximum |
| of 5 channels and the radio will remember them at startup. |
9 | NAVMAN MCB 7270 Marine CB 27 MHz Radio Operation Manual |