| 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 |
| shut down a transmission after five minutes and sound the error beeps. |
2.2 Reset to Factory Defaults
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.
2.3Sample Screens
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.
10 | NAVMAN MCB 7270 Marine CB 27 MHz Radio Operation Manual |