Leica MX421 Series Installation Manual
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Leica MX421 Series Installation Manual

High precision gps sensor
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Summary of Contents for Leica MX421 Series

  • Page 1 MX421 High Precision GPS Sensor Installation Manual...
  • Page 2 MX421 High Precision GPS Sensor INSTALLATION MANUAL Models Covered: MX421 MX421B MX421-10 MX421B-10 MX421SB-10 Leica Geosystems Inc. 23868 Hawthorne Blvd. Torrance, CA 90505-5908 U.S.A. www.leica-geosystems.com P/N 723594 Rev. C August, 2001...
  • Page 3 Leica Geosystems Inc. 2001 Leica Geosystems reserves the right to make changes to its products and specifications without notice.
  • Page 4 Unlike many other consumer electronics industries which only sell consumer elec- tronic devices, your marine dealer is often your best advisor for installation and service of your new GPS receiver. Leica strongly encourages you to utilize the knowledge and experience of your sales and service dealer.

  • Page 5: Table Of Contents

    Figure 6 - MX421 Interface to the MK40 Chartplotter ......13 Data Interface to PC or Non-Leica Navigation Systems ......14 Figure 7 - MX421 Interface to PC or other Non-Leica Navigation Systems ....................14 PC Interface Cable ..................15 Figure 8 - MX421 to PC Interface Cable (P/N 722206) .......
  • Page 6 Data Interface to MX420/8 or MX420/AIS CDU ......... 23 Figure 13 - MX421-10 Interface to MX420/8 or MX420/AIS CDUs ..23 Data Interface to PC or Non-Leica Navigation Systems ......24 Figure 14 - MX421-10 Interface to a PC chartplotter or Other Non- Leica Navigation Systems..............

  • Page 7: Introduction

    The MX421 GPS and DGPS smart antennas were designed to work with the latest Leica Control and Display Units (CDU) or other NMEA 0183 compatible navigation devices. The MX421 can achieve position fix accuracies of better than 1 meter with differential correction or better than 3 meters without correction.

  • Page 8: Mx421 Operation

    1 meter or less. The MX421SB-10 is an enhanced MX421B-10 DGPS smart antenna unit that can either automatically tune to the beacon frequency or can be controlled by a Leica MX420 CDU to manually select the beacon frequency.

  • Page 9: Antenna Connector

    Antenna Connector The multi-pin connector at the bottom of the antenna housing provides the neces- sary interfacing between the MX421 smart antenna and the latest Leica CDU or other NMEA compatible devices. Older production MX421 antennas use 8-pin con- nectors while new build units (MX421-10) use 10-pin connectors. The interface connections from pins 1 through 6 are similar for all MX421 models.

  • Page 10: Supplied Equipment

    MX421 Installation Manual Supplied Equipment he following items are supplied with the MX421 Sensor: Description Part Number (8-Pin Type) MX421 723240 MX421B 723241 Antenna Cable Assy. (10 m.) (8-wire cable) 722569 MX421 Installation Manual 723594 (10-Pin Type) MX421-10 726233 MX421B-10 726232 Antenna Cable Assy.
  • Page 11 MX421 Installation Manual MX421 High Precision GPS Sensor Installation Manual Figure 1 - MX421 Sensor Standard Package...

  • Page 12: Mx421 Mounting Guidelines

    MX421 Installation Manual MX421 Mounting Guidelines • Install the MX421 where it has a clear view of the sky around it. • Locate the antenna for an easy access and maintenance. • Stay away from high-power energy sources such as radar, SSB, INMARSAT and other transmitting radio antennas by 5 meters or more.

  • Page 13: Figure 2 - Mx421 Bracket Mount

    MK40 chartplotter or MX420 CDU, the other end of the cable (with loose wires) connects to the antenna junction box as shown in Figure 4. If the MX421 is to be used with other navigation system, refer to Figure 7 (Connection to Non-Leica Navigation Systems).
  • Page 14 MX421 Installation Manual...

  • Page 15: Mx421 Installation Section

    MX421 Installation Manual MX421 Installation Section (Use this section when installing the MX421 or the MX421B with 8-pin connector)

  • Page 16: Power Requirement

    12 VDC. An in-line fuse or circuit breaker rated at 2 amp. is recommended for overload protection. When the MX421 is connected to a Leica control display unit (CDU), the antenna power can be supplied by the CDU unit.

  • Page 17: Mx421 Connector Configuration

    Where: Pins 1 & 2: are used for GND and 12 VDC input. Pins 3 & 4: Leica proprietary message (LPM) input port. Pins 5 & 6: GPS output to the MK40, MX420 (CDU) or other NMEA 183 compatible devices.

  • Page 18: Mx421B Connector Configuration

    Figure 5 - Interface Cable Configuration for MX421B Where: Pins 1 & 2: are the GND and 12 VDC power input. Pins 3 & 4: Leica proprietary message (LPM) input port. Pins 5 & 6: GPS output to the MK40, MX420 or other NMEA 0183 compatible devices.

  • Page 19: Data Interface To Mk40 Chartplotter

    MX421 Installation Manual Data Interface to MK40 Chartplotter The MX421 and MX421B connection to the MK40 antenna terminal box is shown below. Only three wires from the MX421 or MX421B cable are used, namely; RED ------------------ +12 VDC Black/Shield -------- Negative Return and Signal GND GREEN ------------- GPS Data + MX421 MX421B...

  • Page 20: Data Interface To Pc Or Non-Leica Navigation Systems

    MX421 Installation Manual Data Interface to a PC or Non-Leica Navigation Systems Figure 7 shows the power and data output connections to non-Leica navigation systems using a terminal strip and DB9 connector (user supplied items) to terminate the wires. Pin 6 (Green) GPS OUT...

  • Page 21: Pc Interface Cable

    PC and MX421. Antenna power can be connected to a 12 volt battery through the cigarette lighter adapter. This cable assembly can be purchased from any Leica authorized representatives. Figure 8 - MX421 to PC Interface Cable (P/N 722206)
  • Page 22 MX421 Installation Manual...

  • Page 23: Mx421-10 Installation Section

    MX421 Installation Manual MX421-10 Installation Section (Use this section when installing the MX421 antenna with the 10- Pin connector only)

  • Page 24: Power Requirement

    12 VDC. An in-line fuse or circuit breaker rated at 2 amp. is recommended for overload protection. When the MX421 is connected to a Leica control display unit (CDU), the antenna power can be supplied by the CDU unit.

  • Page 25: Mx421-10 Connector Configuration

    Pins 5 & 6: GPS output to the MK12, MX420 (CDU) or other NMEA 183 compatible devices. Pins 7 & 8: connect to an external beacon receiver like the Leica MX41R. Pins 9 & 10: 1 Pulse Per Second (PPS) output...

  • Page 26: Mx421B-10 & Mx421Sb-10 Connector Configuration

    Pins 5 & 6: GPS output to the MK40, MX420 or other NMEA 0183 compatible devices. Pins 7 & 8: Beacon monitoring signal output. Sends the SNR, Signal and Frequency to the Leica MX420/8 CDU. Connects to Cable B of the MX420/8 CDU. Pins 9 & 10: 1 PPS output...

  • Page 27: Data Interface To Mk40 Chartplotter

    MX421 Installation Manual Data Interface to MK40 Chartplotter Follow the diagram in Figure 11 to interface the MX421 antenna to the MK40 chartplotter. The MX421-10 and MX421B-10 connection to the MK40 terminal box is shown below. Only three wires from the MX421 or MX421B cable are used, namely;...

  • Page 28: Data Interface To Mx420/2 Or Mk12 Cdu

    MX421 Installation Manual Data Interface to MX420/2 or MK12 CDU Use the diagram in Figure 12 to interface the MX421-10 to a Leica MX420/2 or the MK12 CDU. MX421-10 MX421B-10 (16) Red/Wht Red (+12 VDC) MX420/2 or (1) Shield Blk/Shield (GND)

  • Page 29: Data Interface To Mx420/8 Or Mx420/Ais Cdu

    MX421 Installation Manual Data Interface to MX420/8 or MX420/AIS CDU Use the diagram in Figure 13 to interface the MX421B-10 to a Leica MX420/8 or MX420/AIS CDU. MX421B-10 (16) Red/Wht Red (+12 VDC) MX420/8 (1) Shield Blk/Shield (GND) (8) Org...

  • Page 30: Data Interface To Pc Or Non-Leica Navigation Systems

    MX421 Installation Manual Data Interface to PC or Non-Leica Navigation Systems Figure 14 shows the power and data output connections to non-Leica navigation systems using a terminal strip and DB9 connector (user supplied items) to terminate the wires. Pin 6 (Green) GPS OUT...

  • Page 31: Specifications

    MX421 Installation Manual Specifications GPS Receiver Type: L1, C/A Code (SPS), 12-channel continuous Tracking. Frequency: 1575.42 MHz (L1 band) Receiver sensitivity: -143 dBm Costas threshold Update rate: 1 Hz to 5 Hz DGPS Input: RTCM SC-104 format Receiver maximum input signal: -10 dBW Satellite measurement use: 12 channel parallel automatic selection...
  • Page 32 MX421 Installation Manual Beacon Receiver (For MX421B model) Frequency: 283.5 to 325.0 kHz. 2-channel Auto or Manual selection (500 Hz steps) Minimum Signal: 15 uV/m Station Selection: Automatic or Manual on two indepen- dent receiver channels Dynamic Range: 90 dB Adjacent Channel Rejection: 40 dB (500 Hz) Channel spacing:...

  • Page 33: Data Output

    • NMEA: GGA, GLL, GRS, GSA, GSV, GST, VTG, RMC, ZDA, MSS • Leica proprietary messages (TBD) NMEA 0183 Data Output Sentences (1) GGA - Global Positioning System Fix Data Time, position and fix related data for a GPS receiver.
  • Page 34 MX421 Installation Manual 4,5 --- Longitude - E/W 6 ----- GPS Quality Indicator: 0=Fix not available or invalid 1=GPS SPS Mode, fix valid 2=Differential GPS, SPS Mode, fix valid 3= GPS PPS Mode, fix valid 7 ----- Number of Satellites in use, 00-12, may be different from the number in view 8 ----- Horizontal Dilution of Precision (HDOP) 9 -----Antenna altitude/mean-sea-level (geoid)
  • Page 35 MX421 Installation Manual 4 ----- Satellite PRN number 5 ----- Elevation, degrees, 90 degrees maximum 6 ------Azimuth, degrees True, 000 to 359 7 ------SNR (C/No) 00-99 dB, null when not tracking 8 ------2nd and 3rd SV 9,10,11,12 - 4th SV (4) RMC - Recommended Minimum Specific GPS Data Time, date, position, course and speed data provided by a GPS navigation receiver.

  • Page 36: Product Warranty And Limitation Of Liability

    (12) months from date of purchase by Buyer. If during the warranty period, the Leica products or parts thereof (“Product”) are found to be defective in material or workmanship, Seller shall repair or replace the defective Product, at the discretion of the Seller.
  • Page 37 MX421 Installation Manual IN NO EVENT SHALL SELLER BE LIABLE FOR INCIDENTAL OR CONSEQUEN- TIAL DAMAGES OF ANY KIND OR NATURE, INCLUDING, BUT NOT LIMITED TO LOSS OF PROFIT OR REVENUE, COMMERCIAL LOSS, DAMAGE TO OR LOSS OF PROPERTY, ARISING FROM OR RELATED TO THE USE OF THE PRODUCT.

  • Page 38: How Are We Doing

    P/N 723594 and include your name, address and telephone number. We look forward to finding out how we can improve our information services. All of your comments and suggestions become the property of Leica. Please send them to: Leica Geosystems Inc.
  • Page 39 Reader Comment Sheet Installation Manual P/N 723594 Leica welcomes your evaluation of this manual. Please note errors, suggest addi- tions, or make general comments below. Use extra pages if you like. All comments and suggestions become the property of Leica.
  • Page 40 MX421 Installation Manual Place Stamp Here Leica Geosystems Inc. 23868 Hawthorne Blvd. Torrance, CA 90505-5908 ------------------------------------------------------------------------------...
  • Page 41 Leica Geosystems Inc. 23868 Hawthorne Blvd. Torrance, CA 90505, USA Phone +1 310 791 5300 Fax +1 310 791 6108 www.leica-geosystems.com...

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