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Motorola GP68 Operation Manual
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Motorola GP68 Operation Manual

Motorola GP68 Operation Manual

A high performance radio in a class of its own
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Download this manual See also: Service Manual, Operation & Installation Manual
Key Features:
Wide Frequency Bands
Adaptive Power Control™
PL/DPL Coded Squelch Operation
SmarTrunk II Upgrade
Radius Port™ Expendability
Passed MIL STD 810E
Voice Selective Call (option)
Basic Features:
Front Panel Programming
Telephone Interconnect
Radio-To-Radio Cloning
Repeater Operation
Selectable High/Low Power
Selectable Time-Out Timer
Low Battery Alert Indicator
Battery Saver
DTMF Dialing, 9 Number Memory
Keypad Lock
Receive signal strength indicator
Passed Motorola's Accelerated Life Testing
Frequency Range:
VHF 136-174MHz
UHF 430-470MHz
RF Output:
VHF 5W or 1W
UHF 4W or 1W
A High Performance Radio
In A Class Of Its Own

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Summary of Contents for Motorola GP68

  • Page 1 Selectable Time-Out Timer Low Battery Alert Indicator Battery Saver DTMF Dialing, 9 Number Memory Keypad Lock Receive signal strength indicator Passed Motorola's Accelerated Life Testing Frequency Range: VHF 136-174MHz UHF 430-470MHz RF Output: VHF 5W or 1W UHF 4W or 1W...
  • Page 2 Turn Radio On Turn Radio Off Rotate rotary knob clockwise to turn Rotate rotary knob counter- radio on. clockwise until a click is heard to turn radio off. Adjust Volume If there is no receive audio, press end hold the Monitor Button until you hear background noise.
  • Page 3 Low Battery Alert The “BATT” indicator in the LCD continuously flashes whenever the radio has a low battery condition (in receive or transmit mode). A low battery condition is also indicated by three low- pitched beeps, repeated every two minutes. Display Backlight The LCD has a backlight which is activated when the Toggle Light/Enter Button is pressed.
  • Page 4 To Receive Release PTT to hear voice activity on selected channel. To Change Squelch Modes Carrier squelch (CSQ). Tone Private-Line (PL) and Digital Private-Line (DPL) operations are available on a per channel basis. As an option, Signaling squelch (SelCall) operation is available on a per channel basis.
  • Page 5 When programmed to do so, your GP-68 will quickly SCAN the channels you want it To Scan Channels Press (SCAN/D) momentarily to begin channel scanning. When the 'SCAN' indicator flashes. channel scanning is in progress and the 'Home' channel is displayed (until activity is received on another channel).
  • Page 6 Program a stop frequency (normally the upper limit) into channel 20. By remaining in the Frequency Display Mode at either the start or stop frequency you have chosen, press the scan button. The GP68 will search between those two limits until a signal is received.
  • Page 7 (Secure Keyboard Lock Procedure) This will protect all of your critical programmed parameters from being tampered with. Note: When the GP68 is in programming mode it will not transmit or receive until you exit from dealer programming mode. Overview of the Programming Process The following procedures assume that you have read and understood the basic operation of the GP68 from the GP68 User's Manual.
  • Page 8 Programming Controls "Figure A" Note that the ENTER key is on the side of the GP-68, very near the top. "Figure B" Along the top/front of the GP-68 there are four buttons labeled: SIG/A, SQL/B, LOW/C, and SCAN/D - N-DEL. The three buttons along the left side: X, LEFT ARROW, and the MEM/RIGHT ARROW key.
  • Page 9 Channel Number (e.g., "Ch.01"). To enter Frequency Display Mode, press the X key. The GP68 contains 20 memory channels and each channel can store a receive (RX)/Transmit (TX) frequency, the type of offset (plus/minus), offset frequency, RX/TX PL/DPL tone codes, and the default squelch mode.
  • Page 10 To verify the frequencies programmed, from the Channel Display mode, press the X key to toggle between Channel Display and Frequency Display modes. Rotate the Channel Selector knob to the channel you want to verify, then press and hold the ENTER button for three seconds.
  • Page 11 88.5 91.5 94.8 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 162.2 167.9 173.8 179.9 186.2 192.8 203.5 206.5 210.7 218.1 225.7 229.1 233.6 241.8 250.3 254.1 "Figure D" Motorola Tone Conversion Chart...
  • Page 12 To Exit the Special Programming Mode To exit the Special Programming mode, you must turn the radio off then on again. Restoring GP68 Factory Defaults WARNING - this procedure will remove all custom programming from the radio's memory - it will reset the radio to unprogrammed state, as it came from the factory.
  • Page 13 Edit the Channel Scan List Rotate the selector switch to select the St menu item. (Left Arrow) or (Right Arrow) to scroll through the channels (01 to 20). A flashing channel number indicates that the channel is excluded from the scan list. A channel number that lights continuously indicates the channel is included in the scan list For example, a display showing 18 with flashing digits indicates that channel 18 is excluded from the scan list...
  • Page 14 Edit Time Out Timer This menu item allows you to select the Time Out Timer length. Rotate the selector switch to select the Edit Time Out Timer menu item. The menu will display the current setting: tot. xxx, where xxx represents one of OFF -01,- 02,...,-10.
  • Page 15 Placing a Telephone Call To place a call using manual access/ deaccess codes: Press and hold PTT and then dial the access code using the DTMF keys. Release PTT and wait for a dial tone. After dial tone is heard press and hold PTT and dial telephone number If your radio has preprogrammed telephone numbers, press and hold PTT, press...
  • Page 16 To Store a Phone Number Press and hold (MEM) until the radio sounds a second valid keypress tone (takes about 2 seconds). The LCD display indicates that the radio is ready to accept a one-digit, entry. To store a phone number, enter a phone number location in the range 1 to 9, using the numeric keypad.
  • Page 17 To Display a Stored Phone Number Press (MEM) momentarily in the receive mode. Enter a one-digit phone number location, in the range 0 to 9, using the numeric keypad. To view the access code press (Lock/*) to view the deaccess code, press (#).
  • Page 18 If your radio is equipped with the Voice Selective Call option, your radio can be called individually by another user, or as part of a small group. Receiving a Voice Selective Call When the radio decodes a Voice Selective Call, the LCD indicates the type of SelCall message being received as follows: Individual Call Group Call...
  • Page 19 SCI stands for Serial Communications Interface; it is used to configure the GP68 radio and for radio to radio cloning. The SCI port is located at the side of the GP68 radio below the accessory connector.
  • Page 20 Cloning Cable Pinout Programming Cable Pinout The programming cable is used for aligning the radio with the Motorola Radio Service Software (RSS). The RSS has NO other function than to service the radio, it is not for programming modes, editing repeater offsets, changing the scan list, changing frequencies, etc.