CRU software instruction

Connection setup supports three methods: Serial Port, TCP Client, and Data file reading, for OEM board, select Serial Port method.

Click Set port in the Standard bar or click Connection->Settings in the Menu bar, you will go to connection setup.

►Serial port: This is used to connect the com port of the receiver, you need to choose the proper baudrate (CRU supports 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600), click Setup->Connect or click OK directly to connect the OEM board, click Cancel to cancel Connection setup.

RTK, send the carrier phase collected by the base station to the user receiver, and calculate the coordinates by calculating the difference. RTK (Real-time differential positioning) is a measurement method that can obtain centimeter-level positioning accuracy in real time in the field, and its appearance has greatly improved the efficiency of field operations.

Generally, the OEM board is single status when it doesn’t receive differential corrections, if you want to set OEM board as rover and get differential corrections, you can click the Diff on the Standard Bar to set Diff source.  

►Diff: This is used to receive the differential corrections to do RTK, enter the Host IP and port, check on Ntrip option, then click Connect to select one mountpoint.

►Save RTCM: You can save RTCM data from the differential screams while doing RTK.

►Command: CRU software supports to enter commands manually, you can create a command file (*.txt, or *.bin format), click Import to import the command file, the commands will be listed in the Command view.

►Lock: When open Sky View in the float view, you will see all satellite constellations, you can disable or enable the whole satellite system or a specific satellite in Lock, the corresponding satellites will show in Sky View.

►Setup: Only Curve View is enabled, this setup will be highlighted and able to configure, you can check the Position, Velocity, Altitude, satellite SNR and elevation.

►CDL3/CLD5 settings: When CDL3/CDL5 is connected in CRU software, you can use Radio setting to configure the parameters, click Read to get the current parameters, Click Default to restore to the default parameters, after change the parameters, click Set to save the settings, the default setting is as below:

►T300: When receiver (K7 platform) is connected, you can use this option to setup radio work mode.

Protocol: Supports Transparent, TT450S(Trimble), MAC (Medium Access Control), South Survey;

Status: TX/RX, TX means transmit the correction, RX means receive the corrections;

Frequency range: 410-470MHz, 865-867 MHz;

Power: 0.5w, 1.0w, 2.0w;

Refresh: Click Refresh to get current radio work mode status;

Apply: After setup radio work mode, click Apply to save the settings.

CRU software supports to convert CNB file to rinex format, click Rinex Convert in the Navigation bar or in the Menu bar, the Rinex part will be highlighted and able to setup.

The rinex convert steps are as below:

1. Click Folders to browse the static path;

2. Click Rinex Convert in the Project bar; select the cnb file which needs to convert;

3. Click Antenna in the Standard bar, set antenna type and measurement method; You can add antenna parameters if you don‘t find the antenna you want.

4. Click Modify in the Standard bar to set station name and antenna height;

5. Click Rinex Setup in the Standard bar to choose rinex parameters:

Rinex type: supports rinex 2.01, 2.11, 3.01, 3.02, 3.03, 3.04.

Marker name method: Supports four characters in file name, full file name, NMEA + Day (3 character) + Session (1 character)

Sample rate: Auto (default), 1 second, 5 seconds, 10 seconds, 15 seconds, 30 seconds, 60 seconds.

Event/Event Obs: If you convert PPK (dynamic files), you need to check on these two options.

6. Click Rinex Convert in the Standard bar to convert cnb file to rinex file, the rinex files will be stored in the same path as cnb file.

1.Messages

Click Messages to check current output messages of the receiver in the View area, if you send commands in Command, the corresponding messages will show in View area.

2. Tracking

Click Tracking to check current tracked satellites information, if you check Tracking view, when you go to Terminal page, there will be some messages output in View area, it is ephemeris in binary.

3. Terminal

Click Terminal to check current output messages details, and the data log will be highlighted and able to setup in the Standard bar.

ㆍ Clear: Clear all current output messages in the View bar;

ㆍ ASCII/HEX: Click to switch output messages between ASCII and HEX;

ㆍ Font: Change the display font of the output message;

ㆍ Save: Save a file about current output messages, when create a file, the Save button will be highlighted, it means the file is saving, click the Save button again to stop the file saving.

Click View in the Standard Bar to setup the float view, includes Sky View, Attitude View, PVT View, Time View, Curve View, Sky View Secondary.