Navman MCB 7270 Marine Cb Tranciever Instructions Manual
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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)