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UHF CB TRANSCEIVER
OWNER'S MANUAL
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UH-O77 U U GS. IDUPI ICAI1051 -
T.SO MEM
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DESCRIPTION Your UNIDENModel SUNDOWNER UH-O77 represents the most advanced Mobile Sta- tion type radio ever designed for use in the Citizens Band Radio Service. Itwilloperate on any of the 40 frequencies designated as citizens band channels by the Department of Communications. Your Model SUNDOWNER UH-O77features a frequency synthesizing circuit with PHASE LOCK LOOP techniques to assure ultraprecise Frequency control. This radio has been Type Accepted and Type Certified by the D.O.C. WARNING Befo
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INSTALLATION MOBILE STATION INSTALLATION Plan the location of the transceiver and microphone bracket before starting the installa- tion. Select a location that is convenient for operation and does not interfere with the driver or passenger in the vehicle. The radio should be securely fastened to some solid face, us- ing the mounting bracket and self-tapping screws which are provided. MOBILE STATION ANTENNA Since the maximum allowable power output of the transmitter is limited by the D.O.C., the
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4. Set the OFF/VOLUME Control to a comfortable listening level. 5. Listen to the background noise from the speaker. Turn the SQUELCH control slowly clockwise until the noise JUST disappears (no signal should be present). Leave the control at this setting. The SQUELCH is now properly adjusted. The receiver will re- main quiet until a signal is actually received. Do not advance the control too far, or some of the weaker signals will not be heard. OPERATING PROCEDURE TO TRANSMIT CAUTION - The trans
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1 2 1. PRESS- TO-TALK MICROPHONE: The receive and transmit are controlled by the PRESS- TO-TALK switch on the microphone. Press the switch on the microphone to activate the transmitter; release the switch to receive. When transmitting, hold the microphone two inches from the mouth and speak clearly in a normal voice. The mic- rophone provided with your radio is detachable Iow impedance dynamic type. 2. MEM/SKIP SWITCH: In the NORMAL mode: Press the MEM/SKIP switch to program or disable channels
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8. RX INDICATOR: Lights during the receive mode whenever a station is being re- ceived, or whenever the SQUELCH control is adjusted fully counter clockwise. 9. GROUP SCAN INDICATOR: Lights when the GROUP SCAN mode is selected. 10. MEMORY INDICATOR: In the normal mode (SCAN switch OUT): lights if the channel indicated by the CHAN- NEL INDICATOR and selected by the CHANNEL SELECTOR switch is programmed into the selected scan memory. 11. OPEN SCAN INDICATOR: Lights when the OPEN SCAN mode is select
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18. TONE CALL SWITCH: This switch is reserved for optionalSELCALL operation. Push the T. CALL switch, (when this action is taken, TX indicator will flash), then, TONE SIGNAL will be generated and it opens the Squelch of the other units which have the same tone squelch function. 19. TONE SQUELCH SWITCH: This switch is reserved for optional SELCALL operation. Push the T.SQ switch while receiving the TONE SIGNAL. Then, the Circuit of the SQUELCH is automatically opened. 20. CHANNEL SELECTOR SWITCH:
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OPERATING INSTRUCTIONS NORMAL OPERATION RECEIVE OPERATING PROCEDURE 1. Connect the 13.8 Volt power lead, microphone and antenna. 2. Select the NORMAL mode by selecting the SCAN switch (3) to the 'OUT' position. 3. Rotate the SQUELCH control (15) fully counterclockwise. 4. Switch the radio on by turning the OFF/VOLUME control (14) clockwise and adjust for a comfortable volume level, and adjust for a comfortable squelch level. 5. Rotate the CHANNEL SELECTOR switch (20) to select the required chann
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REMOVING GROUP SCAN CHANNELS To DELETE a programmed channel from the Group Scan Memory. 1. Rotate the CHANNEL SELECTOR switch (20) until the channel you wish to remove is displayed. Note that the MEM indicator (10) should be lit, indicating that this channel is currently programmed in the memory. 2. Press and hold the MEM switch (16) for about 2 seconds until a BEEP is heard twice. The MEM indicator (10) should now be extinguished. Select Select Select Remove 'MEM'Light NORMAL CHANNEl CHANNEl OF
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GROUP SCANNING NOTE: 1. If the GROUP SCAN memory has not been programmed wh~nthe GROUP SCAN Mode is selected by selecting the OS/GS Select switch (4) to the OUT position and the SCAN switch (3) is selected, the SUNDOWNER UH-077 will ignore the SCAN switch (3) and will behave as if it had not been pressed. 2. The PRIORITY channel number can easily be read when required by: (a) Temporarily releasing the SCAN switch. (b) Pressing the PTT switch. The radio will jump to the PRIORITY channel for 3 sec
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REMOVING OPEN SCAN CHANNELS When the radio is initially powered up from the box, all 40 channels will be programmed into the OPEN SCAN MEMORY. If you do not wish to scan any particular channels (e.g. if one or more channels are continu- ally busy and always causing the scanning function to pause), you may remove these channels from the scan group using the following sequence. 1. Select the NORMAL mode by selecting the SCAN switch (3) to the OUT position. 2. Select the OPEN SCAN mode by selecting
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REINSTALLINGCHANNELSINTOTHE SCAN GROUP To reinstallpreviouslydeletedchannels intothe scangroup, simply repeatsteps 3 and 4. However,this time notethat there will bea BEEPheard whenthe MEMswitch ispressed, and the MEM indicator will LIGHT,showing the selected channel is now included in the scan group. Select Select Install Select 'MEM'Light NORMAL OPEN SCAN CHANNEL CHANNEL ON I unloen MEM SCAN OS UH-O77 I I DJ I D rr;;JJ: - I , 11 1+ ,%" -, ,_, 1- ! t } - BEEP! . -x. 11 (0)1+ ...x.J Whenyou havef
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SPECIFICATIONS TRANSMITTER SECTION GENERAL Frequency Tolerance at Channels : 40 25°C Frequency Range : 476.425 MHz to (5 minutes after switch 477.400 MHz : :to.5 kHz on) .REPEATER USE (CH-1 Carrier Power : 5W to CH~8,TX only): Spurious Emission 477.175 MHz to In Band : 5/1W 477.350 MHz Out Band : 1pW :2 Crystal Oscillator Current Drain : 1300mA Microphone : 600 ohm, Dynamic Type Modulation Frequency Speaker : 8 ohm, 3W Response: (1 kHz, OdB Antenna Connector : M-Type reference, at 600 Hz Jacks &
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, ,,--,-,-..;:,,::,---, ' WARRANTV WARRANTOR: UNIDEN Australia Pty. Ltd. ("UNIDEN"). ELEMENTS OF WARRANTY: UNIDEN warrants to the original retail owner for the duration of this warranty, UNIDEN CB Product (hereinafter referred to as the Product) to be free from de- fects in materials and craftsmanship with only the limitations or exclusions set out below. WARRANTY DURATION: This warranty to the original user shall terminate and be of no fur- ther effect One (1) Year after the date of original re
