Navman MCB 7270 - Manual (Page 8)

9 NAVMAN
MCB 7270 Marine CB 27 MHz Radio Operation Manual
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.