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22

press UP / DOWN keys on the microphone or press   
“CHA+/CHA- or VOL+/VOL-”on the transceiver 
front panel to select. Slots 10-15 can only be selected 
by using the “UP/DOWN” buttons on the microphone 
or “CHA+/CHA-“ or “VOL+/VOL-“ keys on the 
transceiver front panel.   
2, Manual transmission: If the DTMF autodial list is 
empty, automatic DTMF transmission is disabled. 
However, you can manually enter a sequence of 
DTMF tones manually. 
Press the “CALL” key twice, then enter your desired 
sequence of DTMF tones from the keypad. Finally, 
press the PTT key to transmit. You will hear the 
DTMF tones transmit if they were properly entered.   

—

 

Remote RX Inhibition and RXTX Inhibition 

RX Inhibition

: If RX Inhibit is enabled, the receiver 

will remain inactive until it receives the correct RX 
Enable code.     

RXTX Inhibition

: With RX/TX Inhibit enabled, the 

transceiver will be unable to receive or transmit until it 
receives the correct RX/TX Enable code. 
Refer to page 46 for more about RX Inhibition and 
RXTX Inhibition.   

Summary of Contents for jt270m

Page 1: ......

Page 2: ...We trust this transceiver will give you convenient and reliable communication for many years For the best experience we advise that you read this manual completely before using your new transceiver Notice Please use the transceiver in compliance with local regulations ...

Page 3: ...ver Cool 3 Install with Bracket 4 Connect Accessories 4 Getting Acquainted 6 DTMF Microphone Panel 8 LCD Display 10 Front Panel Description 12 Basic Operation 13 Power on off 13 Turn Volume 13 Select Channel 13 Transmitting and receiving 14 Function Menu Operation 15 Auto Power Off APO Menu 01 16 APRO APRO Menu 02 16 Busy Channel Lock BC Lock Menu 03 16 ...

Page 4: ...unction FM Menu 12 26 FM Scan FM Scan Menu 13 27 FM SQL FM SQL Menu 14 27 FM DualWatch FM DW Menu 15 28 Font size Choose Font Menu 16 28 Key Lock Function Keylock Menu 17 28 Keypad Function Keypad Menu 18 29 Backlight Lamp Menu 19 29 Setting Channel Names Name Menus 20 21 22 30 Set Opening Display OpenDIS Menu 23 31 Custom Keys Set P1 P3 M Key Menus 24 29 32 High Low Power Set Power Menu 30 33 PTT...

Page 5: ...SQL Menu 40 39 Step Step Menu 41 39 Tail Elimination Tail Menu 42 40 Talk Around Talk Menu 43 40 Time out timer TOT Menu 44 40 TX Stop TXStop Menu 45 41 VOX VOX Menus 46 49 41 Wide and Narrow Bandwidth Set WidNar Menu 50 42 User defined Keys Menu 42 OFF 43 FM FM 43 Band change Bandchange 43 Time of system Time 43 Monitor Momentary MONI 44 Monitor Lock MOLO 44 SQ OFF Momentary SQM 44 ...

Page 6: ...750Hz 46 A B Mode Switch A B 46 Talk Around Talk 46 Reverse Frequency Reverse 46 Reset Menu 47 All Reset 47 Function Reset 47 Programming Operation 48 Lease Function 48 Wireless Change Frequency 49 RX Inhibit RXTX Inhibit 51 Setting Transmission Limits Per Minute 52 Maintenance 53 Base Knowledge 53 Cleaning and Maintenance 53 Specification 55 ...

Page 7: ...might block airbag deployment X Do not expose the transceiver to long periods of direct sunlight or extreme heat X Do not transmit for long periods especially at high power Doing so may damage the transceiver or cause the transceiver to overheat X Do not use the transceiver with a damaged antenna or feedline Doing so may damage the transmitter X When using this transceiver Please make sure the ant...

Page 8: ...it carefully and ensure that the below accessories are included If you find any missing or damaged components please contact your dealer immediately Supplied Accessories Item Qty Mobile transceiver 1 DC Power Cable 1 Bracket 1 Bracket Screw Installed in sides of transceiver 2 User Manual 1 Optional Accessories USB Programming Cable DC AC Adaptor DTMF Keypad Microphone No Keypad Microphone Antenna ...

Page 9: ...the red wire to the positive terminal and the black wire to the negative terminal Then plug the power connector into the DC power outlet of the transceiver Note Make sure to turn off the DC power supply and transceiver before connecting The DC power supply can only be connected to an AC power outlet after all connections are completed Keeping the Transceiver Cool As with all modern electronics it ...

Page 10: ...ngle bracket is supplied with the transceiver Please attach the bracket to your desired installation location Remove the two mounting screws from the sides of the transceiver and reinstall them through the holes in the bracket Note Do not install the transceiver where it might interfere with the deployment of airbags Do not place the transceiver in the front windshield The heat of the sun may dama...

Page 11: ...is composed of an antenna feedline and ground network components Carefully consider your antenna system installation for best results with this transceiver For instance be sure the antenna you will use matches your desired operating frequencies Selecting an appropriate antenna is beyond the scope of this manual Do not transmit without first connecting an antenna Doing so may damage the transceiver...

Page 12: ...6 Getting Acquainted Upper Panel Front Panel ...

Page 13: ...t 3 MIC Connector RJ45 4 CHA Channel Up 5 CHA Channel Down 6 LCD display screen 7 VOL Volume Up 8 VOL Volume Down 9 Menu Key 10 P1 Key User defined 11 P2 Key User defined 12 P3 Key User defined 13 Power Switch 14 Antenna Connector 15 Power Connector 16 Earphone Jack ...

Page 14: ...8 DTMF Microphone Panel ...

Page 15: ...9 1 PTT Push to Talk 2 MIC Microphone 3 UP Up VOL 4 DN Down VOL 5 A Call 6 B VFO MR Switch 7 C A B mode Switch 8 D VFO Band Change 9 CHA 10 CHA ...

Page 16: ...isplay No Icon Feature Description Operation Method 1 Memory Channel No 2 Being A Channel Switch A B Key 3 Being B Channel Switch A B Key 4 Keyboard Lockout Press M Key for 2 Seconds 5 VOX Open Refer to Menu 45 ...

Page 17: ...ve DCS 8 Offset Frequency Refer to Menu 34 and 35 Wireless Frequency Open Refer to Page 44 10 Channel scan disabled Refer to Menu 39 11 Low Power Refer to Menu 30 12 High Power Refer to Menu 30 13 Indicate Power strength when transmitting 10 grids for high power 5 grids for small power Indicate signal strength when receiving 14 Auto Power off Refer to Menu 01 ...

Page 18: ...nsceiver with the front panel facing you Find the RJ 45 microphone jack on the left side of the front panel To the right of the microphone jack is a column of three buttons From top to bottom these are CH CH and M Menu The LCD display is directly to the right of these three buttons Below the LCD display is a row of four buttons From left to right these are P1 P2 P3 and the power button Finally to ...

Page 19: ... lower the volume Hold the key to go fast The volume is adjusted in 15 steps from 0 lowest to 15 highest The default setting is 4 Select Channel You can select an operating channel in one of several ways 1 Use the programming software to store operating channels ahead of time You can then access them directly in MR mode using the channel up down buttons or the numeric keypad on the microphone 2 In...

Page 20: ...d the VFO MR switch In VFO mode the transceiver will store the most recently used frequency in each of its supported ranges To switch quickly between the transceiver s supported frequency ranges press the key Transmitting and receiving To transmit press and hold the PTT key of the microphone and speak normally Release the PTT key to stop transmitting Please use Low Power whenever possible If the d...

Page 21: ...ys to select the menu option you wish to modify Hold the key to go fast b You can also input menu number directly by using the numeric keypad to select desired menu 3 Press the M key to select the menu for modification 4 Use the CHA and CHA keys or the VOL and VOL keys to select the desired value 5 Press the M key to confirm your changes 6 Repeat steps 2 5 above to modify other menu options 7 Fina...

Page 22: ...abled APRO APRO Menu 02 The audio processing menu allows you to set up the compander and voice scrambler This setting is stored on a per channel basis Each channel can have a different processing setting By default all processing options are disabled Off You can set this menu to either enable the compander Comp or voice scrambler Scra Busy Channel Lock BC Lock Menu 03 When a Channel has the BC LOC...

Page 23: ...uency you want to save press the M key and press CHA CHA VOL VOL to menu 05 CHASAVE select the channel number which you want to keep after the screen displayed CHASave TO 001 then the frequency is saved Up to 199 of your favorite or most commonly used simplex or repeater channels can be stored in the transceiver for quick and convenient recall In VFO mode enter the frequency you want to save by us...

Page 24: ...be set freely When a radio channel setting of the DTMF enabled you can send DTMF codes by wireless control to achieve individual call group call or RX Inhibition RXTX Inhibition and other functions Dual Tone Multi Frequency DTMF is a signaling method in which two tones are combined to create one of 16 separate codes These codes represent digits 0 9 plus A B C and D The transceiver can generate and...

Page 25: ...programming software b In MR mode each memory channel can be independently set to have DTMF signaling enabled or disabled 2 Press the M key and use the CHA and CHA or VOL and VOL keys to select Menu 06 Press the M key to open the menu and select ON or OFF to enable or disable DTMF signaling The default setting is ON Once you have made your selection press the M key to accept the change followed by...

Page 26: ... to a group call are transceivers which are either set to selective call only or those which have receive or receive transmit inhibit enabled The group character may be A B C or D The default group character is A Consider the following example Set 10 transceivers as follows Item Individual ID Unite ID Group ID Transceiver 1 80811 C Group 1 Transceiver 2 80812 C Group 1 Transceiver 3 80813 C Group ...

Page 27: ... 1 Send the ID code 8083C to call all transceivers in Subgroup 3 Send the ID code 808CC to call all transceivers in Group 1 and Subgroup 3 which are both in Group C DTMF code transmission mode 1 Automatic transmission Fill in the DTMF call list in the programming software In VFO MR CH mode be sure that DTMF Mode is enabled Press the CALL key A key on the DTMF microphone Select an autodial slot fro...

Page 28: ... of DTMF tones manually Press the CALL key twice then enter your desired sequence of DTMF tones from the keypad Finally press the PTT key to transmit You will hear the DTMF tones transmit if they were properly entered Remote RX Inhibition and RXTX Inhibition RX Inhibition If RX Inhibit is enabled the receiver will remain inactive until it receives the correct RX Enable code RXTX Inhibition With RX...

Page 29: ...8 to select the squelch mode OFF Any signal on the channel will open the receiver s squelch CTCSS Only a signal on the channel containing a matching CTCSS tone one of 58 tones will open the receiver s squelch NDCS Only a signal on the channel containing a matching normal DCS code one of 107 codes will open the receiver s squelch IDCS Only a signal on the channel containing a matching inverted DCS ...

Page 30: ...oups 56 0 74 4 107 2 156 7 189 9 241 8 57 0 77 0 110 9 159 8 192 8 250 3 58 0 79 7 114 8 162 2 196 6 254 1 59 0 82 5 118 8 165 5 199 5 60 0 85 4 123 0 167 9 203 5 61 0 88 5 127 3 171 3 206 5 62 0 91 5 131 8 173 8 210 7 63 0 94 8 136 5 177 3 218 1 67 0 97 4 141 3 179 9 225 7 69 3 100 0 146 2 183 5 229 1 71 9 103 5 151 4 186 2 233 6 ...

Page 31: ... 074 152 226 266 351 445 516 632 743 043 114 155 243 271 356 446 523 645 754 047 115 156 244 274 364 452 526 654 050 116 162 245 306 365 454 532 662 051 122 165 246 311 371 455 546 664 Encode Type and Encode Code Menus 10 and 11 Similar to the settings for Decode Type and Decode Code above using Menu 10 EncType and Menu 11 Enc code you may determine the CTCSS or DCS code that is used on a particul...

Page 32: ...ted DCS code 1 of 107 codes Use Menu 11 to set the desired CTCSS or DCS tone using the same tables as for Menu 09 FM Radio Function FM Menu 12 This transceiver has a built in FM broadcast receiver You may listen to FM radio broadcasts using this transceiver To turn the FM broadcast radio on or off FM frequency range 87 5 108MHz In VFO MR CH mode press the M key then press CHA CHA or VOL VOL keys t...

Page 33: ...n antenna to the transceiver FM Scan FM Scan Menu 13 The FM Scan function determines whether the CHA CHA keys scan for active FM channels or simply tune the radio in 50 KHz tuning steps Setting FM Scan Menu 14 to ON will increase tuning speed as only active FM radio signals will stop tuning FM SQL FM SQL Menu 14 The FM SQL menu determines the sensitivity of the FM broadcast scan The higher this se...

Page 34: ...h Menu 13 The default setting is ON Font size Choose Font Menu 16 You can select the font size of the channel display through this menu Select BIG to show both channels in a larger font Choose SMAL to have the active channel in a larger font and the second channel in a smaller font The default setting is SMAL Note BIG font can only be set if Channel Alias is also set as active Key Lock Function Ke...

Page 35: ... key Default is K S Keypad Function Keypad Menu 18 Menu 18 is set depending on which microphone shipped with your transceiver If you received the DTMF microphone set this menu to ON Setting to OFF will not allow you to use the keys on the DTMF microphone If you did not receive the DTMF microphone for power conservation we recommend you set this menu to OFF The default setting is ON Backlight Lamp ...

Page 36: ... to ON if you would like to see channel names instead of merely channel numbers The default is OFF It may be helpful for you to name particular channels with meaningful labels such as callsigns cities or channel use Your channel names can be up to seven characters long You can edit channel names using Menu 22 Access Menu 22 press P2 to edit the first digit press CHA CHA VOL VOL to select the chara...

Page 37: ...ning Display OpenDIS Menu 23 You can select what displays when the transceiver first powers on by using Menu 23 Choose from the following options ALL Boot displayed as full screen display SYS Boot displayed as system welcome word User Boot display as User defined word You can set the user defined word in the programming software Time Boot display as remaining lease time The default setting is USER...

Page 38: ... of the transceiver are user programmable Each key has two possible functions defined in Menus 24 through 29 Key functions are accessed via a short press press and release or long press press and hold for 1 5 seconds by default although this time can be adjusted in the programming software Please refer to Page 37 for details of setting up these programmable shortcut keys While functions for short ...

Page 39: ...g Press SCAN scan P3 short Press MUTE mute M Short Press Enter the menu function High Low Power Set Power Menu 30 You may select your desired transmit power level from Menu 30 For communication with nearby stations we recommend that you use low power This will produce less heat and prolong the useful life of the final amplifier For stations that are more distant you should use high power for impro...

Page 40: ...ould like to enable the PTT ID Set Menu 31 to ON if you would like to enable the PTT ID or OFF to disable it Note a In CH Mode you may not modify this setting b In MR mode each memory channel can be individually programmed to enable or disable PTT ID You may also use the programming software to enable or disable PTT ID for any channel The PTT ID can be sent 1 At the beginning of the transmission T...

Page 41: ...other transceiver s calls directly rather than through a repeater This would be useful in order to determine whether you can establish direct contact with a nearby station freeing up the repeater for other uses To set the Reverse function set Menu 33 to ON To return to normal operation set Menu 33 to OFF Offset Frequency RPT SET RPT TYPE Menus 34 and 35 You can set a channel to use different recei...

Page 42: ...tion using Menu 35 Using the CHA CHA or VOL VOL keys select RPT positive offset the transmit frequency is higher than the receive frequency RPT the transmit frequency is lower than the receive frequency or SING no offset only a single frequency is used For example In VFO mode enter a frequency such as 450MHz and set the offset to 5MHz If RPT Type is RPT then the receive frequency is 450MHz and the...

Page 43: ...monitor several channels more efficiently Channels are scanned until activity is detected on a channel Depending on the scan mode scanning may continue after a specific length of time or it will only continue when the channel is inactive Scan Mode Select the scan mode in Menu 38 There are two modes Time operated TO Scanning stops when an active channel is encountered The scan will pause for five s...

Page 44: ...key Scan up the band again by using the UP key the VOL key or the CHA key Press any other key to stop scanning MR CH scan Scan only programmed memory channels in this mode From MR CH mode select Menu 37 and press the M key to start the scan Scanning begins on the current channel and scans up to higher channel numbers To reverse the scan direction press the DOWN key the CHA key or the VOL key Scan ...

Page 45: ...er levels of the Squelch level setting require stronger signals to open the squelch circuit Set the squelch level to one appropriate to the amount of RF noise in your environment A squelch setting that is too high may cause you to miss receiving a weaker signal while too low a setting may cause you to hear more noise than you might want Set the Squelch Level using Menu 40 There are nine levels of ...

Page 46: ...who are close together wish to temporarily use the output frequency of a repeater Turn Menu 43 ON to enable this feature The default is OFF Time out timer TOT Menu 44 You may use Menu 44 to specify a time out timer for the transmitter Setting such a timer would prevent accidental lengthy transmissions where the transmitter does not properly unkey a stuck PTT key for instance Not only could such tr...

Page 47: ...you won t need to press the PTT key to enable the transmitter Use Menu 46 to turn VOX ON or OFF The default is OFF VOX S Sensitivity VOX Sensitivity determines the level of sound that is needed for the VOX to key the transmitter You should experiment with VOX Sensitivity to find a level that is appropriate to your voice but does not trigger on the presence of too much other background noise Set Vo...

Page 48: ... this according to your country or radio service regulations The default setting is WIDE User defined Keys Menu As previously mentioned the P1 P2 P3 and Menu keys are user programmable While the short press of the M key can only be changed in the programming software the P1 P2 and P3 keys can be programmed using Menus 24 29 Each of these keys has two programmable functions accessed by a short pres...

Page 49: ...f Band change Bandchange In VFO Mode the Band Change button switches between the last used frequencies on 136 MHz 245 MHz or 400 MHz Time of system Time Setting a shortcut to TIME will display the system time There is a built in button cell CR2032 which supply power to continue timing system time when the radio power off Normally the button cell can use several years but you can change a new CR203...

Page 50: ... to listen for weaker signals Pressing the MOLO shortcut will open the squelch while pressing it again will close the squelch again If MOLO stays active for more than 10 seconds squelch will automatically close SQ OFF Momentary SQM If the SQM shortcut is enabled pressing it will disable any CTCSS or DCS squelch allowing any signal to activate the receiver Pressing this key will issue an audible al...

Page 51: ...ow Power LOW Pressing the LOW shortcut will toggle the power level between HIGH and LOW power Emergency EMG The EMG key will sound an emergency alarm When this alarm sounds the indicator LED s will alternate between flashing red and green and TX STOP will display on the screen This mode will remain in force until the PTT is pressed or the transceiver is powered down V M Mode Switch V M The VM shor...

Page 52: ... off Transmit 1750Hz 1750Hz The 1750Hz shortcut will transmit a 1750Hz burst tone when pressed A B Mode Switch A B The A B shortcut will toggle between the A and B channel Talk Around Talk The Talk Around shortcut turns Talk Around mode on or off Reverse Frequency Reverse The Reverse shortcut enables or disables Reverse frequency mode ...

Page 53: ...e M key a third time and the screen will display Waiting When the transceiver restarts the reset is complete Note You may cancel the reset by pressing any key other than the M key when the Reset prompt appears Function Reset Function Reset will reset the transceiver to factory default settings leaving memory channels and the DTMF list intact To perform a Function Reset press the key to turn the tr...

Page 54: ...sed When the Lease Time expires the transceiver will no longer operate and the indicator LED will light continuously red At this point the user may only turn the transceiver power off This function can only be reset with programming software Remaining time You can set the transceiver to display the time remaining for the transceiver lease If the Lease function is enabled using the programming soft...

Page 55: ...needs to add a new communications channel to all deployed radios Thus the staff at the home office may use Wireless Frequency Change to program all the radios remotely without having to do them one at a time and without having to recall them back to the home office for programming Refer to details as following 1 First all transceivers should have Wireless Frequency Change enabled on all 10 transce...

Page 56: ...ogrammed The operators of those nine transceivers would press the shortcut key to enable the transfer An icon will appear acknowledging that the transceiver is ready for programming The master radio would initiate the change using the instructions in Step 6 below Once programming is complete the icon will disappear If it does not disappear programming was not successful Once programming is success...

Page 57: ...phone Send 01 appears on the screen Use the CHA CHA or VOL VOL keys to select the channel you wish to program such as Channel 003 then press the PTT key Press the A key again This will display Send 03 Press the PTT to send the second programming code If the icon disappears programming was successful RX Inhibit RXTX Inhibit RX Inhibition When RX Inhibit is enabled the receiver will be inactive unti...

Page 58: ...es You can then send the Inhibit or Activate codes using another transceiver that has DTMF capability Note If Activation Enable hasn t been checked the transceiver cannot be activated over the air with a reactivation code In this case it can only be reactivated through the programming software Setting Transmission Limits Per Minute To prevent users from transmitting too often and potentially disru...

Page 59: ...ance concerns to authorized dealer Cleaning and Maintenance 1 Handle this equipment with care Do not carry the transceiver by its power cable microphone or antenna 2 Use a soft clean dry cloth to clean the transceiver 3 When storing the transceiver avoid temperature extremes of heat or cold Extreme temperatures may shorten the life of the transceiver 4 After prolonged use the transceiver may requi...

Page 60: ...nsceiver is defective or develops a problem please send it only to authorized service center Please contact your local dealer for assistance We strived to write content of the manual accurately and completely but it might still possible has existence of errors and omissions We do not assume any responsibility We keep right to change product design and specifications at any time As technology devel...

Page 61: ...z Channel Capacity 199 Output Power 4W 10W Operation Mode Half Duplex Dimension L W H 120 90 40mm Weight 315g Modulation Limitation 5KHz Spurious Radiation 60dB TX Current 1A 1 8A Frequency Stability 2 5PPM Rx Sensitivity 0 18µV Modulation Type F3E Audio Power 400mW Standby Current 78mA Power Saving mode is 30mA Rated Voltage 13 8V ...

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