Kenwood TK-940 AUX key, Front Panel Displays and Indicators System display, Group display

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OPERATING FEATURES

AUX key

This key toggles the auxiiiary function on and off. If this key is pressed once, the auxiliary function is en- abled. If the key is pressed again, the auxiliary function is d~sabled.The confirmation tone is the same as that of the scan key. The following auxiliary functions are available and can be progl-amr-iied by the FPU:

1)Horn alert

2)Manual relay

3)System scan delete function

4)Fixed revert system call (invalid if the system is not set)

5)Switching between alphanumeric display and systemlgroup indicator (toggle)

(Invalid if the alphanumeric display is not set) When the alphanumeric display is selected, the confirmation tone is output for about 50ms. When the systenilgroup indicator is selected, the confirmation tone is output twice (output 50ms, off 50ms, output 50ms).

6)AUTO TEL

7)Option signalling reset

8)Invalid

2-2. Front Panel Displays and Indicators System display

Indicates the selected system number (1-MAX32). Only the programmed systems are displayed. The system display is located above the SYSTEM UP/ DOWN key.

POWER S W VOL UP

1I

Group display

Shows the selected group rlumbei (1-MAX 250) Zero ~ndicatesgroup 10 Only the programmed groups

are d~splayed The group d~splay1s located above the ' GROLIP LIPIDOWN key

Scan indicator

The amark on the display goes on in system scan mode.

Delete ( ) 1 indicator

When a system locked out of the system scan se- quence is selected, the ) mark on the display goes on. The mark flashes if there is a locked system during fixed system scan. !It does not light continuously or flash during list type scan.)

BUSY indicator

The BUSY indicator goes on if the PTT button is pressed when the trunked system is busy or while a TX inhibit ID is being received.

CALL indicator

The CALL indicator can be prograrnmed so that it goes on when a specified call is received. This indica- tor goes off when any front panel key is pressed.

If the KDD-4 is installed and the call flag is Y, this , indicator does not go on unless the DTMF code matches.

LCD

SCAN S W

AUX S ' N

I

 

1

SCANTEL

--t- * "- I I

, - v/

Alpha-numeric display

Fig. I

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Contents $@$, ~\, !? .- $LU~CO .i@&4170-XX FX-R%~?ONIT1x57-4590-XXI BIZTesting GeneralAntenna DC Power and wiringInstallation Planning Control Stations 5-1. Antenna system RadioSystem SET-UP Operating Features Delete 1 indicator Front Panel Displays and Indicators System displayScan indicator Busy indicatorDetails of Features SystemIGroup Revert Time-Out TimerTEL ID Codes TEL Mode Last call revertTranspond Free System RingbackSystem Search Preferred System RevertAudible User Feedback Tones Delay toneAuto TEL Proceed toneConventional System Operation Transmit disable receive-only channelsCall indicator, alert tone Talk-aroundContinuous Horn AlertNon-continuous System Scan Type Fix system scanIr 4-1.lntroduction Data Program ModeTransceiver Programming KPG-4 Description Optional PC programming interface cableDescription of Each Modes Clone Mode FigureDealer mode System keyGroup key Panel Tuning ModeVolume key Scan keyInstalling the Signaling Unit KDD-4 Dtmf Option KDD-4assemblyInstallation Installing the KDD-4 in the transceiverMonireset ON-HOOK OFF-HOOK JU2 Accessory Connection Cable KCT-19 OptionJumper setup charts JU3 JUJ Mute UrimuteTerminal function GNDIgnition Sense Cable KCT-18 Option Connecting the KCT-18 to the transceiverR5 and R6 setup chart Modifying the transceiverKES-3 Option Connection procedureExternal Speaker KES-4 OptionFitting the Control Panel Upside Down Page Page Page Page MCF ANT AMP If System -AMPSP RF unitIf unit PLL MIC AMPAudio amplifier unit Squelch circuit Microphone amplifier Vcxo PLLBuff IRF AMP DET InvswControl unit Power supply circuit PLL data outputHorn control CPU LCD AssemblyPower switch circuit Tone generatorBlock diagram Terminal connection diagramTest Terminal connection diagram Terminal functionEeprom AT24C02NlOS12.7 TX-RX Unit IC201 DEC DINMicroprocessor 78312AGF3563BE TX-RX Unit IC209 Microprocessor 75308BGK740BE9 LCD Assy IC2 CLK Output aTEST2 TEST1 DTA114EU--DC NJM78L05UAEeprom DTA114YULCD Assy B38-0731-05 Cc4riq Rating wattageTK-940/941 KusaY4U Tapttte Screw A T Head T a P T T I E Sciiewpannel Screw SETInsulating Tube ANT Cable Speaker 16 QHM 1W Micrqphqnb Icpqwer Modulej .. Drive TX-RXW w w W W 1 W l U U P F I P C X E D CUuupi U P FR c Hesbnatuh ES $j Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Pattern Page Foil side IC20E Dtci 14EU DTCI44EU Page Page Component side PC Board View ~ o h ~ o n esident Page TX-RX Unit TX-RX Section X57 4590 XX A/2 11 TK A1 PLL O w m o d +4- aLIE- - aIz23z= Page Ccrl--------ASSYDISPLAY S~ECTION838 Eqqzj

TK-940 specifications

The Kenwood TK-940 is a highly regarded mobile two-way radio that has earned a reputation for its ruggedness, reliability, and excellent communication capabilities. Designed for professionals in various sectors such as public safety, transportation, and construction, the TK-940 incorporates advanced technologies to meet the demanding needs of users in the field.

One of the standout features of the TK-940 is its robust design, which complies with military specifications for durability. Its construction allows it to withstand harsh environmental conditions, making it suitable for outdoor and challenging work environments. The radio is also equipped with a water-resistant casing, ensuring that it can function reliably even in wet conditions.

The TK-940 operates in the VHF frequency range, providing wide coverage and strong signal penetration. With a power output of up to 110 watts, users can achieve long-range communication, essential for coordinating activities over large areas. The radio supports both analog and digital modes, allowing seamless integration into various communication systems while maintaining high audio clarity.

Another significant feature of the TK-940 is its enhanced audio quality. The radio is equipped with Kenwood's advanced noise cancellation technology, which minimizes background noise and ensures clear voice communication even in noisy environments. The audio output is powerful and adjustable, catering to individual user preferences.

Moreover, the TK-940 supports a variety of signaling options, includingDTMF, MDC-1200, and 2-Tone/5-Tone signaling, facilitating efficient communication. These signaling features enhance interoperability with other communication devices and systems, allowing users to communicate seamlessly with teams or dispatch centers.

Kenwood has also incorporated user-friendly functionalities into the TK-940. It boasts an intuitive user interface with programmable buttons, enabling quick access to essential features. The large, backlit display provides clear visibility and is easy to read in various lighting conditions.

The TK-940 is designed with safety in mind, featuring emergency alerts and lone worker protection, ensuring users can communicate their status in critical situations. Overall, the Kenwood TK-940 is a powerful and versatile mobile radio that combines durability, advanced technology, and user-friendly features, making it an ideal choice for professionals who require reliable communication in the field.