Uniden MC 790 Owner`s manual
Contents
1. CHANNEL FREQUENCY ANT TYPE SHIP SHIP PERMANENT DESIGN ge E Ag lt a l TRAFFIC TO SHIP TO SHORE SCAN LIST SHORE ol 160 VTS Yes Yes 02 H 160 t Yes Yes 03 160 res Yes i 04 160 Yes Yes 05 160 8 Yes Yes Ob H 156 3 Yes No H 07 140 Ye Yes l 1 6 4 Yes No 09 156 4 Yes Yes Fish 10 156 5 Yes Yes 11 156 5 Yes Yes 12 156 Port Ops Yes Yes 13 156 Navigational Yes Yes 14 156 Port Ops H Yes Yes 15 156 Environmenta Yes Yes Environmental 16 156 400 Yes 17 156 850 Yes I Yes 18 161 Yes Yes 19 161 550 Yes Yes 20 161 600 Yes Yes 21 161 650 Yes Yes 1 22 161 700 Yes 23 61 750 Yes Yes 24 161 800 No Yes Busy Tcl 2 161 8 0 Na Yes Busy Tel 26 H 161 900 No Yes Busy Tel 27 157 350 161 950 No Yes Busy Tel 28 157 400 162 000 Public Corresp No Busy Tel 60 156025 61 156 075 62 156 125 63 156 175 64 156 225 65 156 275 375 Port Ops Yes i Yes H 66 156 325 160 925 Port Ops Yes Yes 67 156 375 156 375 Corn Yes i No 68 156 425 156 425 Non Com Yes Fish 69 156 475 156 475 Non Com Yes i Yes Fish 70 156 525 Non Com Yes No Fish 71 156 575 156 575 Non Com Yes i Ves Fish 72 156 625 156 625 i Non Com Yes No j Fish 73 156 675 156 675 Port Ops Yes i Yes 74 156 725 1 156725 Port Ops Yes Yes 7 156 875 156 875 Port Ops Yes 78 156925 61 525 Non Com l2. This key turns on the Memory Scan and gives you SCAN on LCD lu squelch is in operation and Scan Memory Channels are programmed Scat starts its operation While it is on the second digit of the channel number shows movement indicating that the Scan is on When the radio receives a signal on a programmed channel while Me nory Scan is on and squelch opens it indicates its channel number and stays on that channel When the signal is gone squelch closes and Memory Scan is reactivated This key is used to check Memory Scan or when all the memory scen is deleted It is also used when 0 is flashing by mispressing the scan key with no channel number programmed in memory scan If you press this key in a normal operation it shows each channel number programmed in Memory Scan 1 This is the key to turn on the Memory Scan Channel Select the channel you wish to program then press the ENTER Key MEM is indicated on the left hand of the channel number to indicate that the program is com pleted This key deletes the programmed Memory Scan Channells When this key is pressed the lowest numbered channel in the Memory Scan is indicated and deleted If you keep pressing it the next lowest channel number is indicated for deletion O flashes when all the memory scan channels are deleted Thase keys are used to program channel numbers The first number you press becomes the first digit and if the second digit is not
3. considerations must all be taken into account You must select the optimum relationship among these con siderations sa Keep in mind the flexibility designed into the MC790 so that you can most conveni ently use your radio Features which should be considered are l Universal mounting bracket may be installed on either top or bottom of shelf bulkhead or overhead mount ing N The microphone connector faces for ward allowing convenient in dash or built in installations LI The front panel can be fullv reversed to provide for optimum viewing and operating for any mounting position B The REMOTE speaker jack mav be used with an auxiliarv speaker All connections are plug in type for easy removal of the radio A variety of antennas is available from number of quality suppliers It is recom mended you draw upon the advice of your Marine Dealer in determining a suitable antenna for your vessel and range requirements ANTENNA CONSIDERATIONS The more gain the greater the range and the higher above the water line the greater the range Antennas should be located so as not to be in proximity to metal objects The general rules for antennas are Antennas should not have excessively long coaxial feed cables CHOOSING A LOCATION Some of the more important external fac tors to consider in selecting the location of your MC790 are 1 Select a location that is free from spray and s
4. 7 075 3 82 157 125 83 157 175 84 157 225 2 85 157 275 75 86 157 325 51 925 87 157 375 161 975 88 157 425 162 025 SHIP TRAFFIC TO SHIP VTS Ves Port Ops Yes Port Ops Yes Port Ops Yes VTS Yes Satety Yes Comi Yes Comi Vs Com 8 Nan Comi Yes Com Yes Com Yes Ops Yes Navigational Yes Port Ops Yes Environmental RX Only Safety Calin Yes State Control Yes Com Yes Com Yes Port Ops Yes Coast Guard Yes Coast Guarc Yes Coast Guard Yes Publice Corres No Comer fer Public Corresj No Public Corresp No Public Corresp No Port Ops i Yes Port Ops U Yes Com l Yes Non Com Yes Non Com Yes Non Com l Yes Non Com l Yes Non Com Yes Port Ops Yes Port Ops Yes Port Ops Yes Non Com l Yes Com Yes Com Yes Coast Guard Yes US Gov Only Yes Coast Guard Yes Public Corresp 1 No Public Corresp No Public Corresp No Public Corresp No Com i Yes SHIP TO SHORE Yes Yes Yes Yer No Yes Yes No Yes No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No PERMANENT SCAN LIST Coast Ouarn Environment Coast Guan Coast Coast Gi Busy Tel Busy Tel Busy Tel Bi Tel Busy Tel Fish Fish Fish Fish Fish Fish Coast Guard Coast Guarc Busy Tel Busy Tel Busy Tel Busy Tel Busy Tel FM MARINE RADIOTELEPHONE CHANNELS AND FUNCTIONS INTERNATIONAL CHANNELS
5. Connector with a miniature phone plug may be connected to this jack DC Power Connector Battery connections are to be made with the cable supplied to mate with this con nector Remember red is black is The power cord is equipped with a fuse to protect the radio Use only a Six 6 AMPERE fast blow fuse for replacement ANT Connector This connec tor is for connection of the antenna A type PL259 connector is required to make proper connection Note The radio must be connected ic a power source for the memory to function properly Remember disconnect the power cable or you will lose the memory However when this unit is not going Lo used for a long period of time be surc to disconnect the power cable for safety DE cause the current of less than 1 mA is fed for memory back up even after the radio is OFF But in this case you will lose the memory CARE AND MAINTENANCE Your MC790 is 2 1 precision piece S elec if the antenna has been damaged you tronic equipment a nd you should treat it transmit except in case of accordingly Due to the rugged sign A defective antenna may very little maintenance is required amage to your radio however a few precautions should be observed If your radio has been accidentally subject ed to splay or splash you should immediate ly wipe it down with a soft cloth dampened with fresh water so SCAN TAN FERES MANUAL p
6. EIA standards RS152B and RS204C 7 1 4 W 185m m x 9 5 8 L 245m m x 2 1 4 H 58m m 1 6 kg On Off Volume Squelch amp Dimmer controls Key Board Antenna microphone remote speaker DC power 156 to 158 MHz transmit 156 to 163 MHz receive Channel Number TX 25W IW USA INT DUAL SCAN MEM Backlight Key Board amp LCD Plug in microphone mounting bracket and hardware DC power cord mike hanger spare fuse owner s manual 13 8V DC negative ground 25 or I watt keypad selectable 25 watts output 5 0A 13 8V DC watt output 1 0A 13 8V DC FM 5 kHz deviation 40 dB Less than 5 with 3 kHz deviation with 1000 Hz modulating frequencv 70 dB Built in Built in automatic level control ALC i SPECIFICATIONS E RECEIVER Sensitivity Threshold Squelch Sensitivity Tight Squelch Sensitivity Spurious Response Attenuation Image Response Attenuation Intermodulation Attenuation Adjacent Channel Rejection Selectivity Audio Output Power Power Requirernent IF Frequencies Hum and Noise Level se 0 35uV for 12 dB SINAD 0 50uV for 20 dB S N 0 20uV EIA method 2 0uV EIA method 75 08 75 65 dB 12 dB SINAD 70 dB EIA method 7 5 kHz 6 dB down 15 kHz 60 dB down 3 5 watts minimum at 10 distortion at kHz modula tion and 3 5 kHz deviation 4 ohm speaker 0 6A 13 8V DC squelched 1 2A 13 8V DC at rated a
7. Yes Yes 79 2156975 161 575 1 Yes Yes i 80 157 025 161 625 Com Yes i Yes 81 157075 161 675 Coast Guard Yes i Ves Coast Guard 82 157 125 161 725 US Gov Only Yes Yes 83 157 175 161775 Coast Guard Yes Yes Coast Guard 84 157 225 161 825 Public Corresp NO Yes Busy Tel 85 152275 161 875 Public Corresp No Yes Busy Tel 86 157325 161 925 Public Corresp No Yes Busy Tel 87 157 375 161 975 Public Corresp No H Ves Busy Tel B7A 157 375 i 157 375 i 88 157 425 162 025 Yes 1 No Busy Tel L o e TE CAUTION OPERATION ON CHANNELS 15 AND 17 HAS BEEN ELECTRONICALLY RESTRICTED TO LOW POWER TO PROTECT CH 16 THE DISTRESS FREQUENCY GENERAL Channels Frequency Control Method Antenna Impedance Speaker Microphone Channel Display Frequency Stability Operating Tempera ture Range Shock and Vibration Size Weight Controls Connectors Frequency Range Lights and Indicators Standard Accessories Supply Voltage 1 TRANSMITTER Power Output Power Requirement Modulation Hum and Noise Attenuation Audio Distortion Spurious Emission Output Transistor Protection Output Power Stabilization SPECIFICATIONS Transmit 55 Receive 80 PLL synthesizer 50 ohms nominal 2 85 inch 8 ohms Rugged 600 ohms dynamic element with coiled cord and plug in connector SG D 0 00196 gt 20 C to SOC Meets or exceeds
8. age levels when the unit is on This self check will illuminate all segments of the LCD when triggered If this should occur turn unit off then back on to reset the microprocessor chip The programmed functions will not be erased as long as the Back up Battery is functioning Please read the Owner s Manual carefully before operating your unit 2 TURN UNIT OVER AND CAREFULLY REMOVE COVER CABINET PULL UP FROM REAR FIRST COVER CABINET A p 3 DISCONNECT SPEAKER WIRES l 5 REMOVE TWO SCREWS HOLDING FRONT PANEL TO CHASSIS 6 TILT FRONT PANEL 1 7 REPLACE FOUR SCREWS TO SECURE FRONT PANEL TO CHASSIS 4 REMOVE SPEAKER CABINET 1 REMOVE FOUR SCREWS FROM SPEAKER CABINET 8 CAREFULLY REPLACE COVER CABINET BUT ON BOTTOM OF RADIO INSERT UNDER FRONT PANEL FIRST AND THEN LOWER AT REAR OF RADIO 91 TURN RADIO OVER AND RECONNECT SPEAKER WIRE I FADS 10 REPOSITION SPEAKER CABINET ON TOP OF RADIO ANO REPLACE FOUR SCREWS TO SECUR THE HOUSING 11 RETIGHTEN FOUR APPEARANCE COVER SCREWS ENGINE NOISE SUPPRESSION Interference from the impulse noise gen erated by the electrical systems of engines is sometimes a problem with radios The MC790 has been designed to be essentially impervious to ignition impulse noise and alternator noise However in some installations it may be necessary to take measures to further reduce the effect of noise interferencc DC batter
9. ate rial of the mounting surface Instaii the power cable red i black s antenna and all other auxiliary cables and accessories install the radio into the mounting bracket and connect all cables and acces sories to the appropriate jacks and connectors CONTROLS AND INDICATORS WE Microphone Connector unider Mc 780 Plug your Microphone here ON OFF VOLUME Knob Turns power on and adjusts volume le vel SQUELCH Knob Used to sil ence the backaround noise when no signal is being received Turn the knob Just past the point where background noise st ps DIM Control Adjusts the brigh tness of both LCD and the keyboard backlighting for night operation eon LCD Key Board Selects the desired channel LCD display shows 1 through CH 88 For channels I through 9 first you must depress 0 then the d sired channel number If you attempt to enter CH 75 76 and channels other than VHF marine channels which are Ch 29 59 and 89 99 the letter E will flash in the LCD display and also 70 will flash when Ch 70 is selected for transmit on international channels To continue normal use of the radio make a proper channel selection Provides indication of chan nel and function even in brightest sun light O REMOTE If you desired to use another speaker in addition to the one in the un it a four or eight ohm speaker equipped Speaker
10. plash 2 Keep the battery leads as short as pos sible Connection directly to the battery is most desirable If direct connection cannot be made with the supplied power lead any extension should be made with 10 AWG wire Long extensions should use larger wire l 1 3 Keep the antenna lead as short as pos sible Long antenna leads can cause substantial loss of performance for both receiving and transmitting gt Locate your antenma as high as possi ble and clear from metal objects The reliable range of coverage is a direct function of antenna height 5 Select a location that does not allow the radio to be subjected to direct sun light including that coming through windows 6 Select a location that allows free air flow around the heat sink on the rear of the radio 7 Select a location well away from the ship s compass Auxiliary speakers also should be located away from the com pass After you have carefully considered the various factors affecting your choice of location position the radio with the bracket microphone power plug antenna plug and any auxiliary plugs installed into the selected location to assure there is no interference with sur rounding items Mark the location of the mounting bracket Remove the bracket from the radio and use it as a template to mark the holes to be drilled for the mounting hardware Dril the holes and mount the bracket with hardware compatible with the rn
11. programmed within 10 seconds after the first one it returns to the previous channel When the selected channel number does not exist E flashes By pressing this key DUAL is indicated on the display Every one and half seconds it monitors CH 16 If the receiver hears a signal on CH16 it locks onto that channel When the signal stops it returns to monitoring CH16 every one and a half seconds DUAL can be op rated along with Memory Scan By pressing the DUAL key it can be cancelled By pressing this key the power out put can be changed to 1W and it wi l be indicated on LCD By pressing this key again the power out put returns to 25W and the indication on LCD will be turned off This key gives you international channels or USA channels with an indica kuszony 0001207 INT or USA on the display When the radio is activated international channels are automatically available and by pressing the key it goes to USA channels 16 y This key gives you instant access to channel 16 and 16 will be indicated on LCD when you press it BFA This key gives you instant access to channel 87 and will be indicated on LCO when you press it If channel 87A is selected from keyboard while op V s erating U S A channels LCD WILL FLASH u The MC790 has a self check function to indicate malfunctions to overly high incoming npise levels and sudden drastic changes of power volt
12. sit iniden BA MC 790 MARINE RADIOTELEPHONE OWNER S MANUAL UNIDEN MC790 7 The UNIDEN MC790 VHF marine radio transceiver has been designed to give you a rugged reliable instrument that will pro vide you with years of trouble free service You are encouraged to thoroughly read this manual to acquaint yourself with the characteristics and operation of your tran sceiver so that you can contribute to the longevity of your investment With proper care and maintenance your UNIDEN MC790 will outlast your present vessel and serve you well on board several more The full features and flexibility de INSTALLATION battery systems signed into this quality transceiver will prevent it from becoming obsolete regard less of changes in craft or geographic locations The unit may be mounted in any number of convenient locations by utilizing the universal mounting bracket The UNIDEN MC790 is of all solid state design with conservatively rated rugged components and materials compatible with the marine environment The trans ceiver utilizes a number of gaskets sealing rings waterproof membranes and other sealants to effect a splash proof housing for protection of the electronics l CAUTION The MC790 will operate only with nominal 12 volt negative ground It is important to carefully determine the most suitable location for your MC790 on your vessel Electrical mechanical and environmental
13. udio output Ist 21 4 MHz and 455 kHz 50 dB EIA method
14. y wires antenna lead and accessory cables should be routed away from the engine and engine compartment and from power cabling carrying particularly high currents In severe cases of impulse noise interfer ence it may be necessary to install a noise suppression kit that is available from your Marine Dealer CHANNELS AND FUNCTIONS U S A CHANNELS CHANNEL FREQUENCY MHz DESIGN eee SHIP SHORE 4 RAZIE 01 156 050 156 050 02 156 100 156 100 03 156 150 156 150 04 156 200 156 200 05 156 250 156250 06 156300 156 300 7 166 350 156 140 Ot 156400 i 156400 09 166450 156 450 10 156 500 156500 n 156 550 156 550 12 156 600 156 600 13 156 650 156 650 14 i 156 700 156 700 156 750 16 56800 150800 17 156850 156 850 18 156 900 1 156 900 19 156950 156950 20 157000 161 600 21 157 050 157050 22 157 100 157 100 23 1 157150 157 150 24 157200 16 ROO 25 H 157 250 ta H 26 157 300 161 900 27 157 350 1 161 950 28 157400 162000 60 156025 156025 61 156 075 156075 62 156125 156 125 63 i 156 175 156 175 64 156 225 156 225 65 156 275 155 275 66 156825 156 67 156 375 156 3 68 156425 156 428 69 156475 156575 70 156 525 156 525 71 156575 156 575 72 156625 156 625 73 156675 156 675 4 155 725 156 725 77 5 156 875 78 150 925 79 156975 i 80 157 025 8 15
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