Garmin GBR 21 User Manual Page 1

owner’smanualandreferenceguideGBR 21 beacon receiver© 1993-2000 GARMIN CorporationGARMIN International, Inc.1200 East 151st Street, Olathe, Kansa

8Mounting the AntennaThe supplied antenna coupler fits a standard 1-inchantenna mount (not included). Like the receiver, theantenna should be placed a

9Connecting the GBR 21 To Your GPS UnitThe final step in installing the GBR 21 is to connectthe receiver’s DATA IN, DATA OUT and GROUND(Return) lines

10InstallationConnectingGBR and GPSFigure 3: Sample Wiring to GARMIN GPS UnitsGBR 2110-18 VDCUNITS WITH6 PIN PLUGJUMPER THESE TOGETHER FOR 9600 BAUD.L

11GBR 2110-18 VDC(7) YELLOW : GROUND(6) GREEN: BAUD SELECT OUT(5) WHITE: BAUD SELECT INJUMPER THESE TOGETHER FOR 9600 BAUD.LEAVE THESE UNCONN

12autopilot or plotter, are connected to the GPSunit, they must be set to work with NMEA 0183as well.(Note: On some newer model Garmin GPSreceivers,

13automatically default to the last beacontransmitter used each time the GPS unit is turnedon.)9. Select the Satellite Bar Graph Page. A “D” willappe

14The Main Menu Page on theGPS III/III+/12Map/Navtalk. Select ‘Setup’ tomake the desired interfacesettings.From the Interface Page,select ‘RTCM/NMEA’

15• The range of a DGPS beacon transmitter (see theaccompanying Beacon Reference Card) is typicallya few hundred miles, or less. Beyond this range,the

16ReferenceSources ofErrorMultipath— Multipath error occurs when the GPSsignal is reflected before it reaches the GPS receiver. Thereflected signal t

171) Receiver will notpower on (No LED)Power switch/wiring faulty.Fuse/breaker blown (if used).ReferenceTroubleshootingChartThe receiver status indica

© 1993-2000 GARMIN CorporationGARMIN International, Inc.1200 East 151st Street, Olathe, Kansas 66062, U.S.A.Tel. 913/397.8200 or 800/800.1020Fax 913/

18ReferenceTroubleshootingChartIf the ‘No Differential GPSPosition’ message is displayedon your GPS receiver,correction data may not beavailable. This

19ReferencePhysicalSize: 5.2”L x 3.6”W x 1.5”H(132mm x 91mm x 38mm)Weight: 6.8 ounces (0.193 kg)PowerVoltage: 10 - 18 volts DC using suppliedpower/dat

20AAntenna...5, 7Antenna coupler...5, 8Antenna mount...

21NOTES:Maximum Hole Diameter =0.145" (3.68mm)Select fastener type/length peryour installation.3.359" (85.30mm)4.752" (120.70mm)Referen

owner’smanualandreferenceguideGBR 21 beacon receiver© 1993-2000 GARMIN CorporationGARMIN International, Inc.1200 East 151st Street, Olathe, Kansa

1IntroductionLimited WarrantyGARMIN Corporation warrants this product to be free from defects inmaterials and workmanship for one year from the date o

2IntroductionCautionsAll differential beacon receivers decode correction data determined atthe beacon transmitter site via a GPS receiver(s). The GPS

3IntroductionTable ofContentsIntroductionLimited Warranty...1Cautions ...

4InstallationFigure 1: Mounting the Receiver...page 6Figure 2: GBR 21 Cable Connections...

5CapabilitiesThe GBR 21 offers a host of powerful capabilities toenhance the performance and accuracy of your GARMINGPS receiver:• Performance— Single

6Mounting the ReceiverPlease read through these instructions thoroughly beforeattempting installation. Make sure you completely understandthese instru

7 If a problem is found, try altering the location of theunit or wiring. Often moving the antenna a few feet awayfrom the source of interference will