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MCB 7270
Full-Featured Marine CB 27 MHz Radio
Operation Manual
NA VMAN
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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. If this equipment does cause harmful interference to radio or television reception, which can be
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Contents 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 an
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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 maximu
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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 cha
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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. The screen displays the most recent channel, channel band, and
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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)
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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 mod
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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 automatic
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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
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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 2.3.7 ALL SCAN Mode Screens The left hand screen shows the radio in ALL SCAN mode (SCAN) for the ma
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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 2.3.10 PSCAN Working Channel Screen The screen shows the radio in
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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): 1.2kg Waterproof level: JIS-7 Built-in MCU Processor Built-in Sp
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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 rever
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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.1 MARINE
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C.2 LAND (CB) FREQUENCIES Note 1: Do not transmit on CH16. CB CHANNEL FREQUENCY (MHz) (CH16 should be used only for AUSTRALIA a listening watch because it is 1 26.965 reserved for transmissions that 2 26.975 use SSB, not AM). 3 26.985 4 27.005 5 27.015 6 27.025 7 27.035 8 27.055 9 27.065 (Emergency) 10 27.075 11 27.085 (Calling) 12 27.105 13 27.115 14 27.125 15 27.135 16 27.155 (see Note 1) 17 27.165 18 27.175 19 27.185 20 27.205 21 27.215 22 27.225 23 27.255 24 27.235 25 27.245 26 27.265 27
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Appendix D How to contact us www.navman.com NORTH AMERICA Mexico Thailand Holland BNT - Marine Electronics Mercury Marine de Mexico Thong Electronics (Thailand) Co. Ltd. Navimo Holland 30 Sudbury Rd, Acton, MA 01720. Anastacio Bustamente #76 923/588 Ta Prong Road, Mahachai, Industrieweg 4, Toll Free: +1 866 628 6261 Interior 6 Colonia Francisco Zarabia, Muang, Samutsakhon 74000, Thailand. 2871 JE Schoonhoven. Fax: +1 978 897 8264 Zapapan, Jalisco, C.P. 45236 Mexico. Ph: +66 34 411 919 Ph
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Designed in New Zealand Made in China MN000313A N A V M A N Lat 36° 48.404’S N13408 Lon 174° 44.535’E M C B 7 2 7 0
