Instruction/ maintenance manual of the product GBR 21 Garmin
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owner’ s manual and refer ence guide GBR 21 beacon receiver © 1993-2000 GARMIN Corporation GARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. GARMIN (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey , SO51 9AQ, U.
© 1993-2000 GARMIN Corporation GARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. T el. 913/397.8200 or 800/800.1020 Fax 913/397.8282 GARMIN (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey , SO51 9AQ, U.
1 Introduction Limited W arranty GARMIN Corporation warrants this product to be free fr om defects in materials and workmanship for one year from the date of pur chase. GARMIN will, at its sole option, repair or replace any components which fail in normal use.
2 Introduction Cautions All differ ential beacon receivers decode corr ection data determined at the beacon transmitter site via a GPS receiver(s). The GPS system is operated by the government of the United States which is solely responsible for their accuracy and maintenance.
3 Introduction T able of Contents Introduction Limited W arranty ........................................................1 Cautions .....................................................................2 T able of Contents .............................
4 Installation Figure 1: Mounting the Receiver ............................................page 6 Figure 2: GBR 21 Cable Connections ............................................7 Scr een Example: GPS 12/12XL/48 Main Menu.............................8 Scr een Example: GPS 12/12XL/48 Input/Output Settings.
5 Capabilities The GBR 21 offers a host of powerful capabilities to enhance the performance and accuracy of your GARMIN GPS receiver: • Perfor mance— Single channel operation provides high-sensitivity manual tuning throughout the beacon br oadcast band.
6 Mounting the Receiver Please r ead through these instructions thoroughly befor e attempting installation. Make sur e you completely understand these instructions befor e you begin. When in doubt, seek pr ofessional assistance. The receiver may be mounted at a remote location, under the dash or behind a panel.
7 If a problem is found, try altering the location of the unit or wiring. Often moving the antenna a few feet away fr om the source of interfer ence will solve the problem. When a suitable configuration is found, a permanent installation should be made.
8 Mounting the Antenna The supplied antenna coupler fits a standard 1-inch antenna mount (not included). Like the receiver , the antenna should be placed away from all sour ces of interference.
9 Connecting the GBR 21 T o Y our GPS Unit The final step in installing the GBR 21 is to connect the receiver’ s DA T A IN, DA T A OUT and GROUND (Return) lines to your GPS unit. The GBR 21 is designed to transmit/receive data at 4800 or 9600 baud (bits per second).
10 Installation Connecting GBR and GPS Figure 3: Sample Wiring to GARMIN GPS Units GBR 21 10-18 VDC UNITS WITH 6 PIN PLUG JUMPER THESE TOGETHER FOR 9600 BAUD. LEA VE THESE UNCONNECTED FOR 4800 BAUD. GBR 21 10-18 VDC (7) YELLOW : GROUND (6) GREEN: BAUD SELECT OUT (5) WHITE: BAUD SELECT IN JUMPER THESE TOGETHER FOR 9600 BAUD.
11 GBR 21 10-18 VDC (7) YELLOW : GROUND (6) GREEN: BAUD SELECT OUT (5) WHITE: BAUD SELECT IN JUMPER THESE TOGETHER FOR 9600 BAUD. LEA VE THESE UNCONNECTED FOR 4800 BAUD. UNITS WITH 18 PIN PLUG GBR 21 10-18 VDC JUMPER THESE TOGETHER FOR 9600 BAUD. LEA VE THESE UNCONNECTED FOR 4800 BAUD.
12 autopilot or plotter , are connected to the GPS unit, they must be set to work with NMEA 0183 as well. (Note: On some newer model Garmin GPS receivers , you may set the interface to “Garmin Bcn Rcvr”. There is also a scan option which will automatically scan for a DGPS frequency and bit rate .
13 automatically default to the last beacon transmitter used each time the GPS unit is turned on.) 9. Select the Satellite Bar Graph P age. A “D” will appear at the bottom of the signal strength bar for each satellite with a corresponding differen- tial correction or “3D Differential” will be displayed at the top of the satellite page .
14 The Main Menu Page on the GPS III/III+/12Map/ Navtalk. Select ‘Setup’ to make the desir ed inter face settings. Fr om the Interface Page, select ‘R TCM/NMEA ’ to pr operly interface with the GBR 21. DGPS: How It W orks The DGPS Beacon T ransmitter is placed at a known location (i.
15 • The range of a DGPS beacon transmitter (see the accompanying Beacon Reference Car d) is typically a few hundred miles, or less. Beyond this range, the beacon signal cannot be reliably r eceived. • Interference to the beacon signal can be experi- enced during periods of thunderstorm activity .
16 Reference Sources of Error Multipath — Multipath error occurs when the GPS signal is reflected before it r eaches the GPS receiver . The reflected signal takes slightly longer to reach the GPS receiver than a non-reflected signal. This added time delay results in position err or .
17 1) Receiver will not power on (No LED) Power switch/wiring faulty . Fuse/breaker blown (if used). Reference T roubleshooting Chart The r eceiver status indication at the top left of the Satellite Status Page will indicate ‘3D Diff’ or ‘2D Diff’ when differ ential corr ections are available.
18 Reference T roubleshooting Chart If the ‘No Differ ential GPS Position’ message is displayed on your GPS r eceiver , corr ection data may not be available. This may be due to a missing or weak beacon signal, not enough GPS satellites or bad wiring connection between the GBR 21 and GPS.
19 Reference Physical Size: 5.2”L x 3.6”W x 1.5”H (132mm x 91mm x 38mm) W eight: 6.8 ounces (0.193 kg) Power V oltage: 10 - 18 volts DC using supplied power/data cable Current Dr ain: 130 mA Signal Processing Frequency Range: 283.
20 A Antenna.............................................5, 7 Antenna coupler .................................5, 8 Antenna mount..................................6, 8 B Baud rate...............................................9 Beacon Log Page........
21 NOTES: Maximum Hole Diameter = 0.145" (3.68mm) Select fastener type/length per your installation. 3.359" (85.30mm) 4.752" (120.70mm) Reference Mounting T emplate T emplate.
owner ’ s manual and r efe r ence guide GBR 21 beacon receiver © 1993-2000 GARMIN Corporation GARMIN Inte r national, Inc. 1200 East 151st St r eet, Olathe, Kansas 66062, U.S.A. GARMIN (Eu r ope) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romse y , SO51 9AQ, U.
An important point after buying a device Garmin GBR 21 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Garmin GBR 21 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Garmin GBR 21 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Garmin GBR 21 you will learn all the available features of the product, as well as information on its operation. The information that you get Garmin GBR 21 will certainly help you make a decision on the purchase.
If you already are a holder of Garmin GBR 21, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Garmin GBR 21.
However, one of the most important roles played by the user manual is to help in solving problems with Garmin GBR 21. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Garmin GBR 21 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
