Navman MCB 7270 Marine Cb Tranciever Instructions Manual

NAVMAN
w w w . n a v m a n . c o m
MCB 7270
Full-Featured Marine CB 27 MHz Radio
Operation Manual 

It  is  the  owner’s  sole  responsibility  to  install  and  use  the  instrument  in  such  a  manner  that  will  not cause accidents, personal injury or property damage. 
Navman NZ Limited disclaims all liability for any use of this product in a way that may cause accidents, damage or that may violate the law.
Governing  Language:  This  statement,  any  instruction  manuals,  user  guides  and  other  information relating to the product (Documentation) may be translated to, or has been translated...

4NAVMAN   MCB 7270 Marine CB 27 MHz Radio Operation Manual
1 - General Information 5 
 1.1   FEATURES 5
  1.2    SCREEN SYMBOLS AND MEANINGS  6
2 - Basic Operation 7 
 2.1   KEY FUNCTIONS 7
  2.2   RESET TO FACTORY DEFAULTS 10
  2.3   EXAMPLE SCREENS  10
  2.3.1   Power Up Sequence Screens 10
  2.3.2   Channel Band Selection Screens 10
  2.3.3   Transmission Screen 11
  2.3.4   Noise Rejection Selection Screens 11
  2.3.5   Battery Voltage Screens 11
  2.3.6   Priority Channel Screens (Australia) 12...

5NAVMAN   MCB 7270 Marine CB 27 MHz Radio Operation Manual
1 - General Information
Congratulations on your purchase and installation of a Navman MCB 7270 27MHz radio. It provides you with the following useful features:
•  Marine  band  (MB)  communications  with  a  land  band  (CB)  capability,  with  six  favourite channels (three for each band).
• Large LCD screen with prominent (17mm high) channel display. 
•  Special  size,  highlighted  symbols  for  Tx  (transmission),  Rx  (reception),  and  X...

6NAVMAN   MCB 7270 Marine CB 27 MHz Radio Operation Manual
1.2 Screen Symbols and Meanings
This simulation shows the location of all the symbols that may appear on the screen:
Symbol  Meaning
X Channel is locked out (in ALL SCAN mode only).
88 Channel selected (big digits).
Tx Transmitting on maximum power (PTT depressed).
Rx The signal of the tuned channel is greater than the squelch setting and the audio             is not muted.
CH 123  Shows which of the three favourite channels, if any, are...

7NAVMAN   MCB 7270 Marine CB 27 MHz Radio Operation Manual
Note that some of the keys on the radio chassis are duplicated on the microphone for your convenience.
The PTT button and the LOC button are available only on the microphone. 
Key Function
VOL/PWR Volume  and  Power knob. Turn clockwise  (right)  to  turn  the  radio  on.  Continue  to turn  until  a  comfortable  volume  is  reached. VOL/PWR  also  adjusts  the  settings  of an external speaker, if connected. 
 The  screen  displays  the  most...

8NAVMAN   MCB 7270 Marine CB 27 MHz Radio Operation Manual
SQL Squelch or Threshold Level knob.  Sets  the  threshold  level  for  the  minimum receiver signal. 
 Turn  fully  anti-clockwise  (left)  until  random  noise  is  heard,  then  turn  slowly clockwise (right) until the random noise disappears. Make another ¼ turn clockwise for best reception in open sea conditions.
 In areas of high noise (eg close to large cities) reception may improve if sensitivity is reduced by turning SQL slowly...

9NAVMAN   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...

10NAVMAN   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....

11NAVMAN   MCB 7270 Marine CB 27 MHz Radio Operation Manual
CB channel band             MB channel band
2.3.3 Transmission Screen
The screen shows a 4W transmission (Tx) being made on marine (MB) channel band, priority channel 88 (PRI). 
The signal strength is not shown for transmissions
2.3.4 Noise Rejection Selection Screens
The left hand screen displays the REJ symbol, indicating that the noise blanker circuit is on and noise reduction is active.
The right hand screen does not show REJ, meaning that...