EFJohnson 7780 service manual Channel Change Parameter, System Parameters, Channel Parameters

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TRANSCEIVER OPERATION

2.7.4 CHANNEL CHANGE PARAMETER

The “CHAN CHG” menu parameter selects the conventional channel to be reprogrammed. Disabled or SMARTNET/SmartZone channels cannot be selected. This does not change the channel selected for normal operation.

Enter the channel number or scroll through the

programmed channels by pressing the and

keys. When the desired channel is displayed, select it by pressing the ENT key.

2.7.5 SYSTEM PARAMETERS

The “SYS PRM” menu parameter selects the conventional mode timer to be reprogrammed (see

following). Press the and keys to display the desired timer and then press the ENT key to select it.

SCAN TMR - Selects the Scan Hold timer. Press

the and keys to decrement/increment the timer in 0.5-second steps, and press the “0” key to disable the timer (set it to 0 seconds). When the desired value is displayed, store it by pressing the ENT key.

TX TMR - Selects the transmit time-out timer.

Press the and keys to decrement/increment the timer in 15-second steps, and press the “0” key to disable the timer (set it to 0 seconds). When the desired value is displayed, press the ENT key to store it.

PEN TMR - Selects the penalty timer. Press the

and keys to decrement/increment the timer in 15-second steps, and press the “0” key to disable the timer (set it to 0 seconds). When the desired value is displayed, store it by pressing the ENT key.

CONV TMR - Selects the conversation timer.

Press the and keys to decrement/increment the timer in 30-second steps, and press the “0” key to disable the timer (set it to 0 seconds). When the desired value is displayed, store it by pressing the ENT key.

2.7.6 CHANNEL PARAMETERS

The “CHAN PRM” menu parameter selects the conventional channel parameter to be reprogrammed

(see following). Press the and keys to display the desired parameter and then press the ENT key to select it.

RX FREQ - Selects the receive channel frequency.

Press the and keys to move the cursor left and right, and press the 0-9 keys to enter a digit. When the desired frequency is displayed, store it by pressing the ENT key.

TX FREQ - Same as RX FREQ above.

RX CODE - Selects the receive Call Guard (CTCSS/DCS) code. Press the “0” key to display the first available code, and press it again to toggle between types (CTCSS and DCS). Press the

and keys to scroll through the available codes. When the desired code is displayed, store it by pressing the ENT key.

TX CODE - Same as RX CODE above.

TX POWER - Selects the desired power output

level. Press the and keys to scroll through the following choices. When the desired setting is displayed, store it by pressing the ENT key.

•POWER HI - High transmit power

•POWER LO - Low transmit power

•POWER SW - Switchable power selectable by the High/Low power switch. This choice is not available if that switch is not programmed.

TX TMR - Enables or disables the time-out timer

on the current channel. Press the and keys to toggle between the on and off mode, and when the desired setting is displayed, store it by pressing the ENT key.

November 1999

 

Part No. 001-7780-500

2-22

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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 DescriptionAccessories Factory Customer ServicePart Number Breakdown Transceiver IdentificationAccessories AccessoryToll-Free 800 Factory ReturnsReplacement Parts Internet Home Intrinsically Safe InformationDefinitions Temperature Code T3C Possible Ignition SourcesIntrinsically Safe and Nonincendive Ratings Classification of Hazardous Areas and AtmospheresAccessing PC Boards Material ClassificationTypical Hazard Group Class Area ClassificationRemoving RF Unit Removing Logic UnitSpecifications GeneralFeatures Transceiver OperationControls and Display TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator AmberDisplay Front Panel Keys Full Keypad ModelDisplay Turning Power on and Setting Volume Option SwitchesGeneral Operation BacklightOption Switch Functions Function ConvSee Tone ENABLE/DISABLE ScanningConventional and SMARTNET/ Smartzone Operation Conventional Features Display Mode SelectionMonitoring Before Transmitting Monitor Mode Busy Channel LockoutCall Guard Squelch Penalty Timer Conversation TimerPower Output Select Conventional Mode ScanningPriority Channel Sampling DTMF/ANI Signaling Standard Conventional CallsSMARTNET/SMARTZONE Features Viewing Unit IDStandard Group Calls Enhanced Private Conversation CallsTransceiver Operation Private Conversation II Calls Telephone Calls Call Alert Emergency Alarm and Call MessagingSending Status Conditions Failsoft Operation SMARTNET/SMARTZONE ScanningDynamic Regrouping Supervisory Tones Keypad Programming Menu DescriptionZone Change Parameter Channel Change Parameter System ParametersChannel Parameters Programming Setup Pctrunk Software InstallationTransceiver Programming Computer DescriptionConnecting RPI to Computer and Transceiver Starting and ExitingProgramming File Types Help FilesScreen Pop-Up Buttons and File Size Indicator Programming ProcedureFile Size Indication Creating and Displaying SystemsMenu Commands Menu BarRadio Type Menu Download Menu Upload MenuSystems Menu Window MenuDefaults RADIO-WIDE Parameter ScreensBand ZonesRadio Wide Scan List Radio-Wide Scan List ScreenModify List Screen Assign Function ButtonsRADIO-WIDE Conventional Screen RADIO-WIDE SMARTNET/SMARTZONE ScreenFull Spectrum CC Scan Hot DtmfAdjustable Parameters RADIO-WIDE Portable Options ScreenProgramming Conventional Systems and Channels Conventional System General ScreenTimers Conventional System Modify Scan List ScreenKeypad Editing Scan List ButtonScan Timers Setting UP Conventional ChannelsPriority Channel Selection Conventional Channel Screen Parameters Selected ChannelTransmit Power SignalingChannel Type Tx Time-OutRestricted Access Time-Out TimerISW Delay Time Splinter ChannelsSMARTNET/SMARTZONE System Other ID’S Screen SMARTNET/SMARTZONE System Phone Interconnect ScreenPhone Interconnect Private CallSMARTNET/SMARTZONE System Emergency Settings Screen Emergency AlarmSMARTNET/SMARTZONE System Talk Groups Screen Failsoft ChannelSMARTNET/SMARTZONE System Lists Screens Trunking Phone List ScreenMessage Aliasing Screen Announcement Groups Screen Control Channels ScreenTrunking Call List Screen Setting UP SMARTNET/SMART- Zone Channels Status Aliasing ScreenSMARTNET/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 Power Switching and Regulation Power SwitchingCircuit Description Synthesizer DescriptionVCO and Tcxo Modulation Synthesizer Chip IC1Charge Pump Q1, Q2, Loop Filter Receiver Circuit Description RF Amplifier Q1, First Mixer Q2If Amplifier Q2, LIMITER/DETECTOR IC3 Antenna Switch and LOW-PASS Filter Squelch Circuit IC4A/B, IC5ATransmitter Description Amplifier Q9, Driver Q8Control Logic and Display Receive Audio ProcessingMicroprocessor IC306 Pin Descriptions Pin Port Name Input or Description Active High OutputHvfulswlrq Audio Amplifier IC104-IC106 Receive and Transmit Data ProcessingReceive Data FILTER/DETECTOR IC102A/B, IC107A/B Transmit Data Filter IC206B/ IC206A Transmit Audio ProcessingLOW-PASS Filter IC205A/B Smartnet Data ProcessingBattery Pack and Charger Information Battery PackPower Setting Operating Time 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 ScreenTransmit Frequency and Power Transmit Power Adjustment ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Modulation BalanceSquelch Adjust Rssi AdjustAudio Deviation Data DeviationPerformance Tests Receiver Performance TestsPower Output Transmitter Performance TestsTransmit Frequency Transmit ModulationThis page intentionally left blank Parts List Display AssemblyChassis Parts Ref No DescriptionKEY Assembly Display AssemblyIf Assembly KEY 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 Schematic Diagrams and Component Layouts PLL Board TOP ViewPLL 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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