CountyComm GP-5 Operation Manual

CountyComm GP-5 Operation Manual

Fm stereo / mw / sw-ssb dsp receiver

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GP-5/SSB
FM Stereo / MW / SW-SSB DSP RECEIVER
By: CountyComm Inc.
Government Products Group
OPERATION MANUAL
Revised 1-15-2015
www.countycomm.com

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Summary of Contents for CountyComm GP-5

  • Page 1 GP-5/SSB FM Stereo / MW / SW-SSB DSP RECEIVER By: CountyComm Inc. Government Products Group OPERATION MANUAL Revised 1-15-2015 www.countycomm.com...
  • Page 2: Functional Block Diagram

    Functional Block Diagram The GP-5/SSB uses DSP si47XX Microchips (from Silicon Labs, located just blocks from CountyComm, Inc. in the Silicon Valley, USA) to digitalize analog AM/FM/SSB radio signals using modern technology mixed with rock solid radio engineering principles. The DSP...
  • Page 3: Table Of Contents

    TABLE OF CONTENTS CONTROL LOCATIONS.............4,5 LCD DISPLAY..............5,6 GETTING STARTED ............7 TUNING THE RADIO............8 ● ETM (Easy Tuning Mode) ● Manual tuning ● Auto scan stations SINGLE SIDE BAND (SSB)..........10 WORKING WITH MEMORIES..........10 ● ATS - Auto Tuning Storage ● Manually storing station ●...
  • Page 4: Control Locations

    CONTROL LOCATIONS...
  • Page 5: Lcd Display

    12 Lock / Display button 13 DELETE & 9/10kHz MW step set button 14 ALARM On/Off & Setting 15 TIME Setting 16 FM & SW telescopic antenna (Spares available at www.countycomm.com) 17 AM antenna jack 18 Earphone jack 19 Removable belt clip...
  • Page 6 8 Preset memory address 9 ETM indicator 10 Key-lock indicator 11 kHz: frequency unit for MW (AM Broadcast Band) & SW MHz: frequency unit for FM 12 Digital number display (4 Digits) Display With Radio OFF Shows: local time, alarm time, temperature Display With Radio ON Shows: local time, signal strength / SNR, alarm time, temperature, memory address, meter band, SSB fine tuning frequency.
  • Page 7: Getting Started

    GETTING STARTED: 1. Installing batteries: The battery compartment is located on the back of the GP-5/SSB. To remove the battery compartment cover, apply thumb pressure and slide it towards the bottom of the radio. Install three AA fresh alkaline batteries into the battery compartment, observing the battery polarity diagram on the back of the radio.
  • Page 8: Tuning The Radio

    Trouble Shooting: Radio Will Not Power On: If the radio will not turn on, check that the batteries good, and are installed correctly, or the lock function had been applied with symbol " " displayed on screen. TUNING THE RADIO Once your radio has been powered up, then select your desired band by quickly pressing the [FM], [MW], SW [ ] or [...
  • Page 9: Manual Tuning

    Method 2: MANUAL TUNING Turn on the radio, quickly press the [VF/VM] button to switch into frequency mode. Rotate the [TUNING] knob to select your station. FAST/SLOW tuning is shown in the chart below for each band. Method 3: AUTO BROWSE- STATION 1.
  • Page 10: Single Side Band (Ssb)

    SINGLE SIDE BAND (SSB) 1. In any mode, press the [USB/LSB] button to select SSB reception; press again to select USB/LSB. 2. Turn the [TUNING] knob to search stored SSB stations. 3. Press the [BFO] button, when “U” / “L” flashes on the display, turn the [TUNING] knob to adjust the reception.
  • Page 11: Delete Memory

    DELETE MEMORY CHANNELS Method 1: MANUAL DELETING MEMORY 1. Turn on the radio and press the [VF/VM] button causing PRESET stations appears in the display's upper right corner. 2. Rotate the [TUNING] knob to select the memory that you want to delete. 3.
  • Page 12: Setting Clock

    SETTING THE CLOCK 1. Long press the [TIME] button until you see the hour flashing. Rotate the [TUNING] knob to set the correct hour, then quickly press the [TIME] button and notice the minutes are flashing. 2. While it's flashing turn the [TUNING] knob to set the correct minutes, then press [TIME]. SETTING THE ALARM TIME 1.
  • Page 13: Key Lock Function

    KEY LOCK FUNCTION Long press the [ ] button with " " symbol appears in the display to lock up all keys / buttons. Long press it again with the symbol disappears to unlock the keys/buttons. FM ST. (FM STEREO) BUTTON While listening to FM station via stereo earphones, quickly press the [FM.ST] button with "...
  • Page 14: Using The External Antenna

    USING THE EXTERNAL ANTENNA Enhancing FM/SW reception Attach the clip on type “external FM/SW antenna” to the Telescopic antenna of GP-5/SSB, then extend the wire and hang on another end to the window or wall to enhance the FM/SW reception.
  • Page 15: Using The Intelligent Charging Function

    Enhancing AM/LW reception Plug in the AM/LW external antenna into the AM Antenna jack, then rotate the antenna for best AM/LW reception of your selected frequency. USING THE INTELLIGENT CHARGING FUNCTION Caution: Don't charge Alkaline batteries in the radio. This can cause a hazard, and damage your radio.
  • Page 16: Tips For Using Batteries

    IMPORTANT MATTERS FOR USING BATTERIES 1. If your radio is stored for a long time without batteries the clock may need to be reset, but your pre-stored memory channels will continue to be stored. 2. When the battery power is low, the " "...
  • Page 17: Specifications

    SPECIFICATIONS 1. Frequency range 87~108 MHz Japan 76~108 MHz Eu, USA 87.5~108MHz 522~1620 (150~1620) kHz USA 520~1710 kHz 1711~29999 kHz 2. Sensitivity FM (S/N=30dB) Less than 3µV MW (S/N=26dB) Less than 1mV/m LW (S/N=26dB) Less than 10mV/m SW (S/N=26dB) Less than 30µV SSB (S/N=10dB) Less than 3µV 3.Selectivity...

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