EFJohnson 7780 service manual Option Switch Functions, Function Conv, See

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TRANSCEIVER OPERATION

2.3.6 LOW BATTERY INDICATION

When the battery voltage falls below a preset

level, the icon appears in the display. This icon stays on until power is turned off. In addition, the following low battery indications may be programmed to occur:

•The amber BATT indicator on the top panel lights.

•A beep sounds once per minute in the standby mode.

•A beep sounds each time the PTT switch is pressed.

The battery should be recharged as soon as prac- tical after a low battery indication appears. Refer to Section 5 for more battery information. There is also a battery saver function that can be enabled by program- ming. This function uses the RSSI level to determine when the site is very near and then automatically switches to the low transmit power output level.

2.3.7 CHANNEL AND ZONE SELECTION

Channel Select

To change the current channel, rotate the 16-posi- tion channel selector knob on the top panel to the desired position. With SMARTNET/SmartZone chan- nels, the channel is always indicated by alias (name). With conventional channels, the channel number or frequency may also be displayed (see Section 2.4.2).

Zone Select

A zone is a group of up to any 16 conventional and SMARTNET/SmartZone channels defined by programming (see Section 1.2.4). Up to 16 zones can be programmed for a total of 16 x 16 or 256 channels. One use of zones may be to select groups of channels programmed for operation in different geographical areas or radio systems. Zones are selected as follows:

1.Press the Zone option switch and the alias (name) of the current zone is flashed in the display.

2.Use the number keys to enter the desired zone number or scroll through the available zones using

the and keys.

3.Once the desired zone is displayed, press the ENT key or wait 4 seconds.

Table 2-1 Option Switch Functions

Function

Conv.

Smart-

Smart-

See

Mode

Net

Zone

Section

 

Mode

Mode

 

 

 

 

 

Backlight

X

X

X

2.3.3

 

 

 

 

 

Call Alert

 

X

X

2.5.7

 

 

 

 

 

Call Response

 

X

X

2.5.4, 2.5.5

 

 

 

 

 

Displayed Information

X

 

 

2.4.2

 

 

 

 

 

Emergency

 

X

X

2.5.10

 

 

 

 

 

High/Low Power

X

 

 

2.4.10

 

 

 

 

 

Home Zone

X

X

X

2.3.8

 

 

 

 

 

Keypad Lock

X

X

X

2.3.5

 

 

 

 

 

Keypad Programming

X

 

 

2.7

 

 

 

 

 

Message

 

X

X

2.5.8

 

 

 

 

 

Monitor

X

 

 

2.4.4

 

 

 

 

 

Normal/Selective

X

 

 

2.4.6

 

 

 

 

 

Phone

 

X

X

2.5.6

 

 

 

 

 

Priority

X

 

 

2.4.12

 

 

 

 

 

Private Call

 

X

X

2.5.4, 2.5.5

 

 

 

 

 

Radio Wide Scan

X

X

X

2.3.11

 

 

 

 

 

Repeater Talk-Around

X

 

 

2.4.9

 

 

 

 

 

Scan

X

X

X

2.3.11

 

 

 

 

 

Scan Edit

X

 

 

2.4.11

 

 

 

 

 

Site Lock

 

 

X

2.5.14

 

 

 

 

 

Site Search

 

 

X

2.5.14

 

 

 

 

 

Status

 

X

X

2.5.9

 

 

 

 

 

Tones On-Off

X

X

X

2.3.10

 

 

 

 

 

Zone

X

X

X

2.3.7

 

 

 

 

 

2.3.8 HOME ZONE

The radio can be programmed with a home zone. Then when power is turned on, the radio can be programmed so that either the home or last selected zone is automatically selected.

If the Home Zone option switch is programmed, it can be used to quickly select or change the home zone. To select the home zone, momentarily press this switch. Then to change the home zone to the currently selected zone, press and hold this switch until a tone sounds (approximately 1 second).

2.3.9 TIME-OUT TIMER

The time-out timer disables the transmitter if it is keyed for longer than the programmed time. On each

 

November 1999

2-5

Part No. 001-7780-500

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Page 18 Page 20
Contents 7780 Page Page Table of Contents Table of Contents CONT’D List of Figures List of TablesScope of Manual Equipment Description General InformationTransceiver Identification AccessoriesFactory Customer Service Part Number BreakdownFactory Returns AccessoriesAccessory Toll-Free 800Internet Home Intrinsically Safe Information Replacement PartsDefinitions Classification of Hazardous Areas and Atmospheres Temperature Code T3CPossible Ignition Sources Intrinsically Safe and Nonincendive RatingsArea Classification Accessing PC BoardsMaterial Classification Typical Hazard Group ClassRemoving Logic Unit Removing RF UnitGeneral SpecificationsTransceiver Operation FeaturesControls and Display Low-Battery Indicator Amber TX Indicator Red Indicates when the transmitter is keyedFront Panel Keys Full Keypad Model DisplayDisplay Backlight Turning Power on and Setting VolumeOption Switches General OperationFunction Conv Option Switch FunctionsSee Scanning Tone ENABLE/DISABLEConventional and SMARTNET/ Smartzone Operation Display Mode Selection Conventional FeaturesMonitoring Before Transmitting Busy Channel Lockout Monitor ModeCall Guard Squelch Conventional Mode Scanning Penalty TimerConversation Timer Power Output SelectPriority Channel Sampling Standard Conventional Calls DTMF/ANI SignalingEnhanced Private Conversation Calls SMARTNET/SMARTZONE FeaturesViewing Unit ID Standard Group 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 Computer Description Programming SetupPctrunk Software Installation Transceiver ProgrammingHelp Files Connecting RPI to Computer and TransceiverStarting and Exiting Programming File TypesCreating and Displaying Systems Screen Pop-Up Buttons and File Size IndicatorProgramming Procedure File Size IndicationMenu Bar Menu CommandsWindow Menu Radio Type MenuDownload Menu Upload Menu Systems MenuZones DefaultsRADIO-WIDE Parameter Screens BandAssign Function Buttons Radio Wide Scan ListRadio-Wide Scan List Screen Modify List ScreenHot Dtmf RADIO-WIDE Conventional ScreenRADIO-WIDE SMARTNET/SMARTZONE Screen Full Spectrum CC ScanConventional System General Screen Adjustable ParametersRADIO-WIDE Portable Options Screen Programming Conventional Systems and ChannelsScan List Button TimersConventional System Modify Scan List Screen Keypad EditingSetting UP Conventional Channels Scan TimersPriority Channel Selection Selected Channel Conventional Channel Screen ParametersTx Time-Out Transmit PowerSignaling Channel TypeSplinter Channels Restricted AccessTime-Out Timer ISW Delay TimePrivate Call SMARTNET/SMARTZONE System Other ID’S ScreenSMARTNET/SMARTZONE System Phone Interconnect Screen Phone InterconnectFailsoft Channel SMARTNET/SMARTZONE System Emergency Settings ScreenEmergency Alarm SMARTNET/SMARTZONE System Talk Groups ScreenTrunking Phone List Screen SMARTNET/SMARTZONE System Lists ScreensMessage Aliasing Screen Control Channels Screen Announcement Groups ScreenTrunking Call List Screen Status Aliasing Screen Setting UP SMARTNET/SMART- Zone ChannelsSMARTNET/SMARTZONE Channel Screen Parameters Other Screen Parameters SMARTNET/SmartZone Channel ScreenRecommended Tone Call Guard Codes Freq Call Guard CTCSS/DCS Codes and TonesMHz Channels MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels Synthesizer Description Power Switching and RegulationPower Switching Circuit 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 Amplifier Q9, Driver Q8 Antenna Switch and LOW-PASS FilterSquelch Circuit IC4A/B, IC5A Transmitter DescriptionReceive Audio Processing Control Logic and DisplayPin Port Name Input or Description Active High Output Microprocessor IC306 Pin DescriptionsHvfulswlrq Receive and Transmit Data Processing Audio Amplifier IC104-IC106Receive Data FILTER/DETECTOR IC102A/B, IC107A/B Transmit Audio Processing Transmit Data Filter IC206B/ IC206ASmartnet Data Processing LOW-PASS Filter IC205A/BFunction Fahrenheit Celsius Battery Pack and Charger InformationBattery Pack Power Setting Operating TimeBattery Pack and Charger Information Test Setup Alignment Procedure and Performance TestsMm/3/32 Mm/1/8 Phone Jack Tune Software HqhudoMain Pctune Screen Preliminary SetupModulation Balance Transmit Frequency and PowerTransmit Power Adjustment Screen High Power Level = 3.0 watts Low Power Level = 1.0 wattData Deviation Squelch AdjustRssi Adjust Audio DeviationReceiver Performance Tests Performance TestsTransmit Modulation Power OutputTransmitter Performance Tests Transmit FrequencyThis page intentionally left blank Ref No Description Parts ListDisplay Assembly Chassis PartsDisplay Assembly KEY AssemblyKEY Assembly If AssemblyIf Assembly RF Unit PLL AssemblyRF Unit NJM2904V-TE1 IC RF Unit Logic Unit Logic Unit TDA7233D IC Logic Unit 200K ERJ3GE MP35 MP18 MP25 EP2 KEY Front PanelEP1 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 Bottom View If Board TOP ViewRF Unit Transceiver Block DiagramMIC RF Board TOP ViewIf AMP RF Board SchematicHD1 Logic Board TOP ViewReceive Audio Processing Logic Board SchematicGND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GND Display Board Bottom ViewDS3 DS4 DS5 Display Board SchematicKEY Board Back View KEY Board Front ViewS S R R R R KEY Board SchematicScan HC2 HC7 HC8 HC3 Schematic Diagrams and Component Layouts
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