EFJohnson 7780 service manual Specifications, General

Page 14

GENERAL INFORMATION

7780 SPECIFICATIONS

The following are general specifications intended for use in testing and servicing the transceiver. For current advertised specifications, refer to the 7780 product information sheet available from your E.F. Johnson sales representative. Specifica- tions are subject to change without notice.

 

GENERAL

Operating Mode

SMARTNET/SmartZone (trunked) and conventional (non-trunked)

Frequency Range

806-824 MHz transmit (SMARTNET/SmartZone/conventional standard)

 

851-869 MHz transmit (conventional talk-around)

 

851-869 MHz receive

Zones Programmable

Up to 16

Channels Programmable

Up to 16 per zone (256 total)

Transmit/Receive Separation

45 MHz standard, 0 MHz conventional talk-around

Channel Spacing

12.5 kHz - 2.5 kHz maximum deviation

 

25 kHz - 5 kHz max deviation standard, 4 kHz NPSPAC

Frequency Stability (tx and rx)

1.5 PPM –22° to +140° F (–30° to +60° C)

Dimensions (with battery and controls)

6.5” H x 2.2” W x 1.2” D

 

166 mm H x 56 mm W x 30 mm D

Weight (with battery)

18 oz. (515 g)

Power Source

7.5 VDC nickel metal-hydride (NiMH) battery pack, 1300 maH

Typical Battery Life (5-5-90)

7.5 hours (high power), 8.6 hours (low power)

Compliance

FCC parts 15 and 90

Circuit Protection

3-ampere fuse

 

RECEIVER

Sensitivity

0.35 µV (12 dB SINAD)

Selectivity

–65 dB at 25 kHz

Spurious and Image Rejection

–60 dB at 25 kHz

Intermodulation

–65 dB at 25 kHz

Audio Output Power

Internal Speaker - 0.5 watt (16-ohm load)

 

External - 1.5 V rms (680-ohm load)

Audio Distortion

Less than 5% at rated power (0.5 watt)

Audio Response

+1, –3 dB at 6 dB per octave de-emphasis characteristic

Channel Spread

18 MHz

Current Drain

Standby (squelched) - 92 mA maximum

 

Rated Audio Output - 300 mA maximum

 

TRANSMITTER

High RF Power Output

 

Standard Models

3.0 watts (standard mode)

 

2.5 watts (conventional talk-around mode)

Intrinsically Safe Models

2.0 watts at less than 1.55 A (standard mode)

 

1.8 watt at less than 1.60 A (talk-around mode)

Low RF Power Output

1.0 watt (all models and modes)

Spurious and Harmonic

–60 dB at 25 kHz

FM Hum and Noise

–40 dB at 25 kHz

Audio Distortion

5% maximum at 1 kHz

Audio Frequency Response

+1, –3 dB from a 6 dB per octave pre-emphasis characteristic

Audio Modulation

11K0F3E, 16K0F3E, 14K0F3E

Channel Spread

18 MHz (no degradation); 63 MHz (talk-around)

Current Drain (maximum)

Low Power - 1.3 ampere

 

High Power Standard Models -1.75 ampere (2.0 ampere talk-around)

Load Impedance

50 ohms

Duty Cycle (6-6-48 seconds)

5% (Transmit-Receive-Standby)

November 1999

 

Part No. 001-7780-500

1-8

Page 13 Page 15
Image 14
Page 13 Page 15
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 ReturnsDefinitions Replacement PartsInternet Home Intrinsically Safe Information Intrinsically Safe and Nonincendive Ratings Temperature Code T3C Possible Ignition Sources Classification of Hazardous Areas and AtmospheresTypical Hazard Group Class Accessing PC BoardsMaterial Classification Area ClassificationRemoving RF Unit Removing Logic UnitSpecifications GeneralControls and Display FeaturesTransceiver Operation TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator AmberDisplay DisplayFront Panel Keys Full Keypad Model General Operation Turning Power on and Setting VolumeOption Switches BacklightSee Option Switch FunctionsFunction Conv Tone ENABLE/DISABLE ScanningConventional and SMARTNET/ Smartzone Operation Monitoring Before Transmitting Conventional FeaturesDisplay Mode Selection Call Guard Squelch Monitor ModeBusy Channel Lockout 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 Sending Status Conditions Emergency Alarm and CallMessaging Dynamic Regrouping Failsoft OperationSMARTNET/SMARTZONE Scanning Supervisory Tones Zone Change Parameter Keypad ProgrammingMenu Description Channel Parameters Channel Change ParameterSystem 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 ButtonPriority Channel Selection Scan TimersSetting UP Conventional Channels 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 ChannelMessage Aliasing Screen SMARTNET/SMARTZONE System Lists ScreensTrunking Phone List Screen Announcement Groups Screen Control Channels ScreenTrunking Call List Screen SMARTNET/SMARTZONE Channel Screen Parameters Setting UP SMARTNET/SMART- Zone ChannelsStatus Aliasing Screen 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 DescriptionCharge Pump Q1, Q2, Loop Filter VCO and Tcxo ModulationSynthesizer Chip IC1 If Amplifier Q2, LIMITER/DETECTOR IC3 Receiver Circuit DescriptionRF Amplifier Q1, First Mixer Q2 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 Data FILTER/DETECTOR IC102A/B, IC107A/B Audio Amplifier IC104-IC106Receive and Transmit Data Processing 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 AssemblyIf Assembly If AssemblyKEY 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 Bottom View Schematic Diagrams and Component LayoutsPLL Board TOP 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
Top Page Image Contents