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  5. Quick Start Manual

I-Lotus M12M Quick Start Manual

Summary of M12M

  • Page 1

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 1 m12m tm quick start guide prepared by: i-lotus pte. Ltd. Sales & marketing department.

  • Page 2

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 2 contents 1 overview ........................................................................................................................ 3 1.1 m12m positioning receiver ........................................................................

  • Page 3

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 3 1 overview this guide 1.1 m12m positioning receiver the m12m oncore is a 12-channel positioning receiver offering one of the fastest time to first fix (ttff) specifications in the industry, and split second reacquisition times. 1.2 m12m timin...

  • Page 4

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 4 2 product highlights features present on all m12m receivers include the following:  12-channel parallel receiver design  code plus carrier tracking (carrier-aided tracking)  position filtering  antenna current sense circuitry  operation ...

  • Page 5

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 5 3 receiver description the m12m oncore receiver provides position, velocity, time, and satellite tracking status information via a serial port. A simplified functional block diagram of the m12m receiver is shown below in figure 3.1. Figure 3....

  • Page 6

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 6 figure 3.2 antenna drive circuit performance the following table lists the assigned signal connections of the m12m receiver's power/data connector. Pin # signal name description 1 txd1 transmit data (3v logic) 2 rxd1 receive commands (3v logi...

  • Page 7

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 7 current: 5 a typical @ 2.7v and 25 c ambient temperature backup power retains the real-time-clock, position, satellite data, user commanded operating modes, and message formatting..

  • Page 8

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 8 4 m12m oncore receiver printed circuit board mechanical drawing figure 3.4: m12m oncore printed circuit board layout with straight, 0.050" [1.27mm] pitch, 10 pin data header.

  • Page 9

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 9 5 time raim algorithm (m12m timing receiver only) time receiver autonomous integrity monitoring (t-raim) is an algorithm in oncore timing receivers (including the m12m t) that uses redundant satellite measurements to confirm the integrity of ...

  • Page 10

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 10 trial measurement (m) residual (mm) status new residual (mm) 1 9.998 14.5 ok 2 2 10.001 11.5 ok -1 3 9.999 13.5 ok 1 4 10.000 12.5 ok 0 5 10.002 10.5 ok -2 6 10.100 -87.5 removed 7 9.999 13.5 ok 1 8 10.001 11.5 ok -2 ave 10.0125 10.000 table...

  • Page 11

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 11 status of the automatic site survey and position-hold modes is retained in ram when the receiver is powered down if battery backup power is provided. 7 100pps output (m12m timing receiver only) with the m12m timing firmware, the timing outpu...

  • Page 12

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 12 the 1pps offset and 1pps cable delay features work the same in 100pps mode as they do in 1pps mode. In 100pps mode, these commands are used to accurately control the placement of the pulse after the long pulse. 8 one pulse per second (1pps) ...

  • Page 13

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 13 output data timing relative to measurement epoch figure 3.8: output signal timing the 12 channel position/status/data messages (@@ha and @@hb), the t-raim setup and status message (@@hn), and the time message (@@gb) are the only output messa...

  • Page 14

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 14 the rising edge of the 1pps signal is adjusted so that it occurs corresponding to the fractional part of time equal to the total above. The fractional part of time is measured relative to utc or gps time depending on the setting of the time ...

  • Page 15

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 15 time to first fix (ttff) ttff is a function of position uncertainty, time uncertainty, almanac age, and ephemeris age as shown in the table below. The information shown below in table 3.8 assumes that the antenna has full view of the sky whe...

  • Page 16

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 16 if backup power is available, the m12m retrieves its last known position coordinates from ram when main power is reapplied, and uses this information in the satellite acquisition algorithm. In addition, the receiver retains the almanac and l...

  • Page 17

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 17 9 i/o commands the binary commands can be used to initialize, configure, control and monitor the m12m receivers. The binary commands are supported on the primary communications port at 9600 baud. Immediately following this page are listings ...

  • Page 18

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 18 i/o command list index by binary command binary command function description winoncore mnemonic m12m m12m timing page # @@ag satellite satellite mask angle mask 73 @@am receiver satellite ignore list ignore 75 @@am position position lock par...

  • Page 19

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 19 binary command function description winoncore mnemonic m12m m12m timing page # @@cc ephemeris ephemeris data output ------- see @@bf @@ce dgps pseudorange correction input corin 121 @@cf receiver set to defaults default 123 @@ch almanac alma...

  • Page 20

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 20 10 12 channel position/status/data message (@@ha) this message is the ‘standard’ m12m binary position/status message. The @@ha message provides position and channel related data to the user at a specified update rate. Default mode: polled no...

  • Page 21

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 21 12 channel position/status/data message (@@ha) binary format in this example we will look at the @@ha command. This command is use to retrieve position, status and data message information. The @@ha portion is the initial command type indica...

  • Page 22

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 22 = line feed however, the (c), (), and () commands are transparent to a user and do not need to be keyed when entering commands. Response to the @@ha command: @@hamdyyhmsffffaaaaoooohhhhmmmmaaaaoooohhhhmmmmvvvvhddttimsidd (repeat ‘imsidd’ ser...

  • Page 23

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 23 speed/heading vv = 3d speed in cm/s 0…51400 (0.0 to 514 m/s) vv = 2d speed in cm/s 0…51400 (0.0 to 514 m/s) hh = 2d heading 0….3599 tenths of degrees (0.0 to 359.9º) geometry dd = current dop 0 .. 999 (0.0 to 99.9 dop) (pdop for 3d fix, hdop...

  • Page 24

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 24 0111 (7) 24.00m 1000 (8) 48.00m 1001 (9) 96.00m 1010 (10) 192.00m 1011 (11) 384.00m (ura continued) 1100 (12) 768.00m 1101 (13) 1536.00m 1110 (14) 3072.00m 1111 (15) 6144.00m *no accuracy prediction is available – unauthorized users are advi...

  • Page 25

    01 may 2008 m12m ™ quick start guide (403-ttn-001) page 25 oooo = oscillator offset 0…250000 hz tt = oscillator temperature - 110…250 half degrees c (- 55.0…+125.0°c) time mode/utc parameters: bit 7: 1 = utc time mode enabled 0 = gps time mode enabled bit 6: 1 = utc offset decoded 0 = utc offset not...