Navman MCB 7270 - Manual (Page 9)

10 NAVMAN
MCB 7270 Marine CB 27 MHz Radio Operation Manual
If you are not in scanning mode and select a locked out channel, X is displayed by
the channel number on the screen. See Section 2.3.8 for an example.
To unlock a channel, press SCAN to exit from any scanning mode (if necessary),
select the locked out channel and then press SKIP. The X symbol disappears to
show the channel is no longer locked out. See Section 2.3.8 for an example.
PTT Press To Talk. Microphone only. Press PTT to transmit at any time on an allowable
channel. This automatically stops scanning. See Section 2.3.3 for an example.
You must release PTT to receive a signal. If it sticks, a built-in timer will automatically
shut down a transmission after five minutes and sound the error beeps.
Use this to delete all your favourite channel settings, all your locked channels, and all your scan
settings.
1. Turn the radio off with VOL/PWR.
2. Press and hold both SCAN and SKIP while you turn the radio on with VOL/PWR.
The screen shows CL and the radio resets to the factory defaults.
The following sections show typical screens and explain each example.
2.3.1 Power Up Sequence Screens
The left hand screen shows the startup screen that appears for 1.5 seconds after the radio is powered
up.
The startup screen is followed by a screen that shows the software version and then the most recent
settings. In this example, the radio tunes to channel (86) in the marine (MB) channel band. The radio is
receiving (Rx) at maximum signal strength.
Startup screen Most recent settings
2.3.2 Channel Band Selection Screens
The left hand screen shows the radio set to receive (Rx) on the land (CB) channel band. The radio
tunes to the most recently used channel.
Noise rejection (REJ) is on and the signal strength is shown
(SIGNAL).
The right hand screen shows the radio receiving on CH 86 in the marine (MB) channel band.
2.2 Reset to Factory Defaults
2.3 Sample Screens