EFJohnson 7780 service manual Supervisory Tones

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TRANSCEIVER OPERATION

currently registered on a site, “SITE x” is displayed, where “x” is the site number. If the site is locked (see following), “LOCK x” is displayed instead. The display then indicates the RSSI (Receive Signal Strength Indicator) value of the current site as “RSSI x” and then returns to displaying the channel alias.

Searching For a New Site

To display the RSSI level of the current site, press the Site Search option switch (if programmed). The current site number is then displayed as “SITE x” followed by the RSSI level as “RSSI x”. If the Site Search option switch is not pressed again, this mode is automatically exited and the normal channel informa- tion again displayed.

To scroll through the other programmed sites, repeatedly press the Site Search option switch while “SITE x” or “RSSI x” is displayed. Each time it is pressed, the information for the next site is displayed. To select the displayed site, simply do not press the switch again and that site is selected when the normal channel display returns. If site lock is on when site search is entered (see following), the radio will be locked on the new site when this function is exited.

Locking/Unlocking a Site

It is sometimes desirable to stay on the current site regardless of signal level. To lock the radio on the current site so that it does not search for another, press the Site Lock option switch (if programmed). The display then momentarily indicates “LOCK x” to indi- cate that the current site is locked (“x” is the current site number). To unlock the site, press the Lock switch again and “UNLOCK” is momentarily displayed.

When locked on a site, it is still possible to search for a different site using the site search function described in the preceding section. When a new site is found, the radio is then locked on that site.

2.6 SUPERVISORY TONES

Single Beep (Alert Tone)

•Power was turned on and a successful power-up sequence occurred (Section 2.3.2).

•The time-out timer is about to expire or the penalty timer has expired (Sections 2.3.9 and 2.4.7).

•The conversation timer is about to expire (Section 2.4.8).

•The system received your page but the paged mobile is not on the air (Section 2.5.7).

•Telephone interconnect is not operational (Section 2.5.6).

Continuous Tone (Invalid or No Acknowledge Condition)

•A transmission is being attempted on an unpro- grammed channel or a conventional channel programmed as receive-only.

•The transmitter is disabled by the busy channel lockout feature (Section 2.4.5).

•The transmitter has been disabled by the time-out timer feature (Section 2.3.9).

•The transmitter has been disabled by the conversa- tion timer (Section 2.4.8).

•An out-of-range condition exists (SMARTNET/ SmartZone only).

•A transmission is being attempted before the penalty timer has expired (Section 2.4.7).

•Dynamic regrouping has been exited but the dynamic regrouping channel is still selected (Section 2.5.13).

•The paged mobile did not acknowledge the page (Section 2.5.7).

•The message that was sent has not been acknowl- edged (Section 2.5.8).

•The status condition that was sent has not been acknowledged (Section 2.5.9).

Single Short Medium-Pitch Tone

•A valid key has been pressed. Single Short Low-Pitch Tone

•An invalid key has been pressed. Six Beeps (Recurring)

•The page was received (Section 2.5.7). Three Beeps (Recurring)

•A unit-to-unit call was received (Section 2.5.4).

November 1999

 

Part No. 001-7780-500

2-20

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Contents 7780 Page Page Table of Contents Table of Contents CONT’D List of Tables List of FiguresGeneral Information Scope of Manual Equipment DescriptionPart Number Breakdown AccessoriesFactory Customer Service Transceiver IdentificationToll-Free 800 AccessoriesAccessory Factory ReturnsInternet Home Intrinsically Safe Information Replacement PartsDefinitions Intrinsically Safe and Nonincendive Ratings Temperature Code T3CPossible Ignition Sources Classification of Hazardous Areas and AtmospheresTypical Hazard Group Class Accessing PC BoardsMaterial Classification Area ClassificationRemoving RF Unit Removing Logic UnitSpecifications GeneralTransceiver Operation FeaturesControls and Display TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator AmberFront Panel Keys Full Keypad Model DisplayDisplay General Operation Turning Power on and Setting VolumeOption Switches BacklightFunction Conv Option Switch FunctionsSee Tone ENABLE/DISABLE ScanningConventional and SMARTNET/ Smartzone Operation Display Mode Selection Conventional FeaturesMonitoring Before Transmitting Busy Channel Lockout Monitor ModeCall Guard Squelch Power Output Select Penalty TimerConversation Timer Conventional Mode ScanningPriority Channel Sampling DTMF/ANI Signaling Standard Conventional CallsStandard Group Calls SMARTNET/SMARTZONE FeaturesViewing Unit ID Enhanced Private Conversation CallsTransceiver Operation Private Conversation II Calls Telephone Calls Call Alert Messaging Emergency Alarm and CallSending Status Conditions SMARTNET/SMARTZONE Scanning Failsoft OperationDynamic Regrouping Supervisory Tones Menu Description Keypad ProgrammingZone Change Parameter System Parameters Channel Change ParameterChannel Parameters Transceiver Programming Programming SetupPctrunk Software Installation Computer DescriptionProgramming File Types Connecting RPI to Computer and TransceiverStarting and Exiting Help FilesFile Size Indication Screen Pop-Up Buttons and File Size IndicatorProgramming Procedure Creating and Displaying SystemsMenu Commands Menu BarSystems Menu Radio Type MenuDownload Menu Upload Menu Window MenuBand DefaultsRADIO-WIDE Parameter Screens ZonesModify List Screen Radio Wide Scan ListRadio-Wide Scan List Screen Assign Function ButtonsFull Spectrum CC Scan RADIO-WIDE Conventional ScreenRADIO-WIDE SMARTNET/SMARTZONE Screen Hot DtmfProgramming Conventional Systems and Channels Adjustable ParametersRADIO-WIDE Portable Options Screen Conventional System General ScreenKeypad Editing TimersConventional System Modify Scan List Screen Scan List ButtonSetting UP Conventional Channels Scan TimersPriority Channel Selection Conventional Channel Screen Parameters Selected ChannelChannel Type Transmit PowerSignaling Tx Time-OutISW Delay Time Restricted AccessTime-Out Timer Splinter ChannelsPhone Interconnect SMARTNET/SMARTZONE System Other ID’S ScreenSMARTNET/SMARTZONE System Phone Interconnect Screen Private CallSMARTNET/SMARTZONE System Talk Groups Screen SMARTNET/SMARTZONE System Emergency Settings ScreenEmergency Alarm Failsoft ChannelTrunking Phone List Screen SMARTNET/SMARTZONE System Lists ScreensMessage Aliasing Screen Announcement Groups Screen Control Channels ScreenTrunking Call List Screen Status Aliasing Screen Setting UP SMARTNET/SMART- Zone ChannelsSMARTNET/SMARTZONE Channel Screen Parameters SMARTNET/SmartZone Channel Screen Other Screen ParametersCall Guard CTCSS/DCS Codes and Tones Recommended Tone Call Guard Codes FreqMHz Channels MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels Circuit Description Power Switching and RegulationPower Switching Synthesizer DescriptionSynthesizer Chip IC1 VCO and Tcxo ModulationCharge Pump Q1, Q2, Loop Filter RF Amplifier Q1, First Mixer Q2 Receiver Circuit DescriptionIf Amplifier Q2, LIMITER/DETECTOR IC3 Transmitter Description Antenna Switch and LOW-PASS FilterSquelch Circuit IC4A/B, IC5A Amplifier Q9, Driver Q8Control Logic and Display Receive Audio ProcessingMicroprocessor IC306 Pin Descriptions Pin Port Name Input or Description Active High OutputHvfulswlrq Receive and Transmit Data Processing Audio Amplifier IC104-IC106Receive Data FILTER/DETECTOR IC102A/B, IC107A/B Transmit Data Filter IC206B/ IC206A Transmit Audio ProcessingLOW-PASS Filter IC205A/B Smartnet Data ProcessingPower Setting Operating Time Battery Pack and Charger InformationBattery Pack Function Fahrenheit CelsiusBattery Pack and Charger Information Alignment Procedure and Performance Tests Test SetupTune Software Hqhudo Mm/3/32 Mm/1/8 Phone JackPreliminary Setup Main Pctune ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Transmit Frequency and PowerTransmit Power Adjustment Screen Modulation BalanceAudio Deviation Squelch AdjustRssi Adjust Data DeviationPerformance Tests Receiver Performance TestsTransmit Frequency Power OutputTransmitter Performance Tests Transmit ModulationThis page intentionally left blank Chassis Parts Parts ListDisplay Assembly Ref No DescriptionKEY Assembly Display AssemblyKEY Assembly If AssemblyIf Assembly PLL Assembly RF UnitRF Unit NJM2904V-TE1 IC RF Unit Logic Unit Logic Unit TDA7233D IC Logic Unit 200K ERJ3GE MP35 MP18 MP25 KEY Front Panel EP2EP1 MP32 MP33 MP27 MP34 MP28 MP29 MP23 MP22 MP30 MP24 MP26 MP18 PLL Board TOP View Schematic Diagrams and Component LayoutsPLL Board Bottom View If Board TOP View If Board Bottom ViewTransceiver Block Diagram RF UnitRF Board TOP View MICRF Board Schematic If AMPLogic Board TOP View HD1Logic Board Schematic Receive Audio ProcessingDisplay Board Bottom View GND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GNDDisplay Board Schematic DS3 DS4 DS5KEY Board Front View KEY Board Back ViewKEY Board Schematic S S R R R RScan HC2 HC7 HC8 HC3 Schematic Diagrams and Component Layouts
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