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Garmin GBR 21 Owner's Manual And Reference Manual

Other manuals for GBR 21: Installation Instructions Manual, Notice
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Summary of GBR 21

  • Page 1

    Owner’s manual and reference 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.K. Garmin (asia) corporation no. 68,...

  • Page 2

    © 1993-2000 garmin corporation garmin international, inc. 1200 east 151st street, olathe, kansas 66062, u.S.A. Tel. 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.K. Tel. 44/1794.519944 fax 44/1794.519222 g...

  • Page 3

    1 introduction limited warranty garmin corporation warrants this product to be free from defects in materials and workmanship for one year from the date of purchase. Garmin will, at its sole option, repair or replace any components which fail in normal use. Such repairs or replacement will be made a...

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    2 introduction cautions all differential beacon receivers decode correction 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. The dgps beacon transmit...

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    3 introduction table of contents introduction limited warranty........................................................1 cautions .....................................................................2 table of contents .......................................................3 list of figures ............

  • Page 6

    4 installation figure 1: mounting the receiver............................................Page 6 figure 2: gbr 21 cable connections............................................7 screen example: gps 12/12xl/48 main menu.............................8 screen example: gps 12/12xl/48 input/output settings...

  • Page 7

    5 capabilities the gbr 21 offers a host of powerful capabilities to enhance the performance and accuracy of your garmin gps receiver: • performance— single channel operation provides high-sensitivity manual tuning throughout the beacon broadcast band. • ease of use— operation is controlled using the...

  • Page 8

    6 mounting the receiver please read through these instructions thoroughly before attempting installation. Make sure you completely understand these instructions before you begin. When in doubt, seek professional assistance. The receiver may be mounted at a remote location, under the dash or behind a...

  • Page 9

    7 if a problem is found, try altering the location of the unit or wiring. Often moving the antenna a few feet away from the source of interference will solve the problem. When a suitable configuration is found, a permanent installation should be made. The gbr 21 may be mounted on any flat surface. S...

  • Page 10

    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 sources of interference. As a general rule, mount the antenna at least three feet from all other antennas and the vessel’s electrical...

  • Page 11

    9 connecting the gbr 21 to your gps unit the final step in installing the gbr 21 is to connect the receiver’s data in, data 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). The receiver defaults to 4800 baud, whic...

  • Page 12

    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. Leave 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...

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    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. Leave these unconnected for 4800 baud. Units with 18 pin plug gbr 21 10-18 vdc jumper these together for 9600 baud. Leave these unconnected for 4800 baud. Units with 4 pi...

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    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. Pleas...

  • Page 15

    13 automatically default to the last beacon transmitter used each time the gps unit is turned on.) 9. Select the satellite bar graph page. 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 display...

  • Page 16

    14 the main menu page on the gps iii/iii+/12map/ navtalk. Select ‘setup’ to make the desired interface settings. From the interface page, select ‘rtcm/nmea’ to properly interface with the gbr 21. Dgps: how it works the dgps beacon transmitter is placed at a known location (i.E., the exact position o...

  • Page 17

    15 • the range of a dgps beacon transmitter (see the accompanying beacon reference card) is typically a few hundred miles, or less. Beyond this range, the beacon signal cannot be reliably received. • interference to the beacon signal can be experi- enced during periods of thunderstorm activity. Othe...

  • Page 18

    16 reference sources of error multipath — multipath error occurs when the gps signal is reflected before it reaches 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 error. (the distance to ea...

  • Page 19

    17 1) receiver will not power on (no led) power switch/wiring faulty. Fuse/breaker blown (if used). Reference troubleshooting chart the receiver status indication at the top left of the satellite status page will indicate ‘3d diff’ or ‘2d diff’ when differential corrections are available. A ‘d’ appe...

  • Page 20

    18 reference troubleshooting chart if the ‘no differential gps position’ message is displayed on your gps receiver, correction 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. 8) beacon signa...

  • Page 21

    19 reference physical size: 5.2”l x 3.6”w x 1.5”h (132mm x 91mm x 38mm) weight: 6.8 ounces (0.193 kg) power voltage: 10 - 18 volts dc using supplied power/data cable current drain: 130 ma signal processing frequency range: 283.5 - 325.0 khz minimum signal: 10 µv acquisition time: 15 seconds data pro...

  • Page 22

    20 a antenna.............................................5, 7 antenna coupler.................................5, 8 antenna mount..................................6, 8 b baud rate...............................................9 beacon log page..................................12 beacon range............

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    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 template template.

  • Page 24: Gbr 21

    Owner’s manual and reference 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.K. Garmin (asia) corporation no. 68,...