Navman Mcb 7270 Marine Tranciever Operation 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 from, another language  (Translation).  In  the  event  of  any  conflict  between  any Translation  of  Documentation,  the English language version of the Documentation will be the official version of the Documentation.
This  manual  represents  the  Navman  MCB  7270  radio  at  the  time  of  printing.  Navman  NZ  Limited reserves the right to make changes to specifications without notice.
Copyright © Navman NZ Limited, New Zealand. All rights reserved. NAVMAN is a registered trademark of Navman NZ Limited.
RF Emissions and Installation Notice:
This  equipment  has  passed  Australian  Type  Certification  Standards  AS4355  and  AS4367.    It generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with  the  instructions,  may  cause  harmful  interference  to  radio  communications.  However,  there is  no  guarantee  that  interference  will  not  occur  in  a  particular  installation.  If  this  equipment  does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try and correct the interference by one or more of the following measures:  •  reorient or relocate the receiving antenna.
  •  increase the separation between the equipment and receiver.
  •  connect the equipment into an outlet on a circuit different from that to which the                        receiver is connected.
  •  consult the dealer or an experienced radio/TV technician for help.
ACA Maritime Licensing Statement for both 27 MHz and VHF
1.  A person must not operate (as) a maritime ship station on land.2.  A person operating a maritime ship station must use a form of identification at the start of      each transmission, or series of transmissions, that clearly identifies the station.3.  Refer to the following Internet Website for more information:  http://www.scaleplus.law.gov.au/html/instruments/0/25/pdf/2004052602.pdf 
						

							
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
  2.3.7   ALL SCAN Mode Screens 12
  2.3.8   Locked Out and Unlocked Channel Screens 12
  2.3.9   Store Favourite Channels Screens 13
  2.3.10   PSCAN Working Channel Screen 13
  2.3.11   PSCAN Favourite Channel Screen 13
Appendix A - Technical Specifications 14
Appendix B - Troubleshooting 15
Appendix C - Radio Channels (Australia) 16
  C.1   MARINE (MB) FREQUENCIES 16
  C.2   LAND (CB) FREQUENCIES 17
Appendix D - How to Contact Us  18
Contents 
						

							
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  (Channel Lockout).
•  Powerful transmission output (4W maximum legal).
•  Adjustable brightness settings for the screen and keypad for easy use in all                            lighting conditions - including night time and bright sunlight.
•  Adjustable backlighting for the microphone. 
•  Long cable for the microphone (2.3m when comfortably stretched).
•  Extension cable with jack, for connection to an external speaker.
•  Top centred PTT button for comfortable left- or right-handed use.
•  Quick access keys on the microphone for easy selection of channels (+/-), priority channels (88/9), local mode (LOC) and favourite channel functions (3CH).
• Channel 88/9 Priority/Distress key on the radio unit and microphone. 
•  Special 3CH key for easy selection of your three favourite channels.
•  Most recently used channel is remembered and displayed at power up.
•  PSCAN  facility  to  scan  the  working  channel  and  the  priority  channel,  or  the  favourite channel(s) and the priority channel (similar to a dual watch facility).
•  ALL SCAN mode with busy channel lockout facility.
•  Noise rejection can be activated from chassis or microphone.
•  Powerful external speaker (up to 4W ).
•  Voltage indicator (and low battery warning) for the battery supplying the radio.
•  Waterproof and submersible to comply with JIS-7.
•  Meets AS4355 and AS4367 technical specifications.
1.1 Features 
						

							
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 selected. Otherwise blank.
PRI  Priority Distress/Calling channel is selected. 
BAT Voltage (shown in big digits) of the battery supplying the radio. If the battery voltage     falls below 10.8V, BAT will flash continuously and the radio will sound a warning       beep.
LOC  Local mode for 10-12dB reduced receiver sensitivity.
REJ  Noise rejection is on. 
CB (Citizen Band) land radio band frequencies are selected.
MB (Marine Band) marine radio band frequencies are selected.
SCAN  The radio is in scanning mode (four scanning modes are available).
SIGNAL  The signal strength of the received channel. The bars are always shown when the       radio is receiving. One bar indicates a very weak signal, eight bars indicates a very       strong signal. Note that the signal strength is not shown for transmissions. 
						

							
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  recent  channel,  channel  band,  and  noise  rejection setting. See Section 2.3.1 for an example.
 Turn fully anti-clockwise (left) until the knob clicks to turn the radio off.
2 - Basic Operation
2.1 Key Functions 
						

							
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 clockwise (right).  Also see REJ (noise rejection) and LOC (Local mode) because these may also improve reception quality.
88/9  Priority  Channel  (Australia). Also  on  the  microphone. Press  to  cancel  all  other modes  and  tune  into  the  priority  channel  (CH88  if  MB  is  selected,  or  CH9  if  CB is  selected).  See  Section  2.3.6  for  an  example.  Press  88/9  again  to  return  to  your original channel.  
 In  countries  other  than  Australia,  consult  your  dealer  about  your  local  priority channels.
BAND Channel Band. Press to toggle between marine (MB) and land (CB) channel band frequencies. The  screen  shows  the  selected  channel  band  and  radio  tunes  to  the most recently used channel in that channel band. See Section 2.3.2 for an example. Appendix C shows the frequencies for each channel band. 
3CH Three Favourite Channels. Also on the microphone. You can store three favourite channels for marine (MB) and another three favourites for land (CB) channel band frequencies. 
 To store a favourite channel for the first time, select the channel band, then the channel. Press and hold 3CH for at least 1.5 seconds to store it in the CH1 location. Repeat  the  procedure  to  store  two  more  favourite  channels  in  the  CH2  and  CH3 locations respectively. See Section 2.3.9 for an example.
 NOTE:  If you try and add another favourite channel with 3 already stored, “FL” shows in the display. You may store a new CH3 frequency only after deleting the old one.  CH1 and CH2 remain unless you delete them.
 To select a favourite channel, select the channel band then press 3CH to toggle between  your  favourite  channels.  The  channel  band  and  CH1,  CH2,  or  CH3  are displayed to show which favourite channel is currently selected. 
 To delete  a  favourite  channel,  select  it  then  press  and  hold  3CH  for  at  least  1.5 seconds until the CH1, CH2 or CH3 symbol disppears off the screen.
DIM Backlighting. Press repeatedly to step through the settings (OFF, LOW, MED, HIGH) until the desired backlight level is obtained.
SCAN Scanning Mode. PSCAN and ALL SCAN modes are  available  on both land (CB) and marine (MB) channel bands.
 To scan one channel, select that channel then immediately press and release SCAN. The radio goes into PSCAN mode; scanning the selected channel and automatically  checking the priority channel once every 4 seconds (like Dual Watch mode). 
 To scan  one favourite  channel,  select  that  channel  with  3CH  then  immediately press and release SCAN. The radio goes into PSCAN mode; scanning the favourite channel  and  automatically    checking  the  priority  channel  once  every  4  seconds (like Dual Watch mode). See section 2.3.11 for an example.
 
  
 
 
  
						

							
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 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.  
						

							
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. 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 
						

							
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 the noise blanker circuit is off. 
Noise rejection on             Noise Rejection Off
2.3.5 Battery Voltage ScreensThe battery voltage (BAT ) is shown in big digits over two screens.  In this example, a battery voltage of 12.60V is displayed. The first screen displays the battery symbol (BAT ) and the whole volts (12) reading for one second. After one  second  the  next  screen  appears,  showing  BAT  and  the  partial  volts  (.60)  reading  for  one  second.  This cycle is repeated twice.  
Whole volts              Partial volts (note the decimal point)