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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.
Contents 1 - General Information 1.1 FEATURES 1.2 SCREEN SYMBOLS AND MEANINGS 2 - Basic Operation 2.1 KEY FUNCTIONS 2.2 RESET TO FACTORY DEFAULTS 2.3 EXAMPLE SCREENS 2.3.1 Power Up Sequence Screens 2.3.2 Channel Band Selection Screens 2.3.3 Transmission Screen 2.3.4 Noise Rejection Selection Screens 2.3.5 Battery Voltage Screens 2.3.6 Priority Channel Screens (Australia) 2.3.7 ALL SCAN Mode Screens 2.3.8 Locked Out and Unlocked Channel Screens 2.3.9 Store Favourite Channels Screens 2.3.
1 - General Information 1.1 Features 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).
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.
2 - Basic Operation 2.1 Key Functions 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.
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).
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.
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. Press To Talk. Microphone only. Press PTT to transmit at any time on an allowable channel. This automatically stops scanning.
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.
2.3.6 Priority Channel Screens (Australia) The left hand screen shows the radio receiving (Rx) on the marine (MB) channel band priority (PRI) channel 88. The signal strength is at maximum, noise rejection mode (REJ) and local mode (LOC) are selected. The right hand screen shows the radio receiving on the land (CB) channel band priority (PRI) channel 09. Priority channel 88 Priority channel 09 2.3.
2.3.9 Store Favourite Channels Screens The screens show three favourite channels being stored on the marine (MB) channel band; Channel 72 is favourite channel 1 (CH 1), channel 82 is favourite channel 2 (CH 2) and channel 86 is favourite channel 3 (CH 3). Three favourite channels can also be set for the land (CB) channel banks, giving a total of six stored favourite channels. Favourite CH 1 Favourite CH 2 Favourite CH 3 2.3.
Appendix A - Technical Specifications GENERAL Compliance: AS4355 and AS4367 Frequency range: 26.965 - 27.980 MHz Frequency stability: .001% Phase locked loop Dual Watch, Favourite 3 Channel Scan, All Scan CH88/9 Recall LCD display (viewing area): 30 x 25 mm (black on silver) LCD and microphone keys backlit Backlighting control: 4 levels (OFF, LOW, MED, HIGH) Dimensions (without trunnion): 162 x 75 x 157mm Weight (with microphone): 1.
Appendix B - Troubleshooting 1. The radio will not power up. A fuse may have blown OR there is no power getting to the radio unit. a) Check the power cable for cuts, breaks, or squashed sections. b) If the power cable is fine, replace the 3 Amp fuse (1 spare fuse is supplied). c) Check the voltage of the battery that supplies the radio (see BAT in Section 2.1). It should be at least 10.8V DC. 2. The radio unit blows the fuse when the power is switched on. The power wires may have been reversed.
Appendix C - Radio Channels The MCB 7270 radio is a marine band (MB) radio that includes a land band (CB) capability. The MCB 7270 radio should be installed in a boat and operated from a boat. The marine band (MB) should be used to communicate with other boats and coast guard stations. The land band (CB) should be used from the boat only to communicate with individuals or organisations based on the land. If you require a radio only for land-based communications, use a CB radio. C.
C.2 LAND (CB) FREQUENCIES CB CHANNEL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 17 FREQUENCY (MHz) AUSTRALIA 26.965 26.975 26.985 27.005 27.015 27.025 27.035 27.055 27.065 (Emergency) 27.075 27.085 (Calling) 27.105 27.115 27.125 27.135 27.155 (see Note 1) 27.165 27.175 27.185 27.205 27.215 27.225 27.255 27.235 27.245 27.265 27.275 27.285 27.295 27.305 27.315 27.325 27.335 27.345 27.355 27.365 27.375 27.385 27.395 27.
Appendix D How to contact us NORTH AMERICA BNT - Marine Electronics 30 Sudbury Rd, Acton, MA 01720. Toll Free: +1 866 628 6261 Fax: +1 978 897 8264 e-mail: sales@navmanusa.com web: www.navman.com OCEANIA Australia Navman Australia Pty. Limited Suite 2, 408 Victoria Road Gladesville NSW 2111, Australia. Ph: +61 2 9879 9000 Fax: +61 2 9879 9001 e-mail: sales@navman.com.au web: www.navman.com New Zealand Absolute Marine Ltd. Unit B, 138 Harris Road, East Tamaki, Auckland.
MC B 7270 Designed in New Zealand Made in China Lon 174° 44.535’E MN000313A Lat 36° 48.
