User's Manual
Table Of Contents
- About This Manual
- Chapter 1 FCC Related Statements
- Chapter 2 Product Overview
- Chapter 3 Product Composition
- Chapter 4 Operation and Maintenance
- Chapter 5 Accessory Devices
- Chapter 6 Technical Specifications
- Chapter 7 Environment Requirements
- Figures
- Tables
- Glossary
ZXSDRR8978UserManual
Figure3-14ConnectionoftheCALInterfaceCable
3.4.7EAM/RGPSInterfaceCable
Function
Thedrycontact(EAM)interfaceislocatedattheexternallteratthebottomoftheZXSDR
R8978.Itusesaneight-coreroundconnector.ItsupportstheRGPSfunctionsandone
drycontractinputtotransparentlytransmittheexternaldevicestatus.
TheRGPSreceiverislocatedattheGPSreceivingantenna.Installedneartheantenna,
thesatellitecardtransmitstheoutputdigitalsignaltotheclockmaincontrolcardthrough
adifferentialline.BecausedigitalsignaltransmissionisnotaffectedbyRFsignal
attenuation,theremotedistanceislongandgoodreliabilityandmaintainabilityisensured.
Connection
EndAisconnectedtotheEAMinterfaceoftheZXSDRR8978.EndBisconnectedtothe
drycontactoutput/RGPSinterfaceoftheexternaldevice.
3.5ExternalCableConnection
Figure3-15illustratestheexternalcableconnection.
3-14
SJ-20140808143736-001|2014-10-30(R1.1)ZTEProprietaryandCondential