# Survey Basic

Survey Basic is available when you connect a controller to a Trimble instrument.

You can use it as follows:

- If a job was created with a station setup, then Survey Basic can display raw data, and coordinates based on the station setup in the job.
- If a current station setup does not exist, you can:
  - Make simple distance or angular checks.
  - Define the northing and easting coordinates for the instrument point in Survey Basic, set the horizontal circle and then display coordinates for points observed using Survey Basic.
  - Key in the elevation for the instrument point and then display the elevation for points observed using Survey Basic.
  - Observe to a point with a known reference elevation to compute the instrument elevation and then display the elevation for points observed using Survey Basic.

You cannot store measurements in Survey Basic.

Survey Basic functions

To view the Survey Basic screen, tap the instrument icon in the status bar and then tap Survey Basic.

Tap the ... | to ...
--- | ---
Instrument icon on the status bar | access the Instrument functions screen
Target icon | set or modify the target height
Zero softkey | set the instrument horizontal circle to 0
Set softkey | set the horizontal circle
set the target height
set the reference elevation, and compute the instrument elevation
set the instrument point coordinates, and instrument elevation
set the instrument height
Options softkey | modify the correction values used in Survey Basic
Clear softkey | reset the angles back to live and clear the slope distance after a measurement
Display view button | switch the display between HA, VA, SD and HA, HD, VD
Press the ... | to ...
Enter key | measure a distance and fix the horizontal and vertical angles

When a survey is running you cannot change:

- the instrument's horizontal circle
- the instrument point coordinates
- correction values

To compute the instrument point elevation from a known reference point

1. Ensure that a current station setup does not exist and then start Survey Basic.
2. Tap Set and then enter the Target height, Reference elevation, and Instrument height.
3. If required, enter the Horizontal angle and instrument point Northing and Easting.
4. To measure the reference point, tap Measure. The instrument point Elevation is computed.
5. To return to Survey Basic, tap Accept.

To change the view on the data displayed, tap the arrow button.

- If the target height or instrument height is null, the software cannot calculate a VD.
- If target height and instrument height are both null, the software assumes zero for both and can compute the VD, but cannot compute the elevation.
- If a station setup is computed using Survey Basic, a scale only projection of 1.0 is used to calculate coordinates.

To compute the inverse distance between two measurements

Inverse provides the ability to display inverse calculations between two measurements. You can configure inverse to compute Radial inverses from a single measurement to one or more other measurements, or Sequential inverses between successive measurements.

1. From the Survey Basic front screen tap Inverse. (In portrait mode, swipe right to left along the row of softkeys to view the more softkeys.)
2. Set the Method to Radial or Sequential.
3. Enter a target height, if required.
4. Tap Meas 1 to measure to the first point.
5. Enter a target height, if required.
6. Tap Meas 2 to measure to the next point.
7. The inverse results are displayed.
   - Tap Continue to measure subsequent points. The process then continues from step 4.
   - Tap Reset to return to step 1.
8. To return to Survey Basic, tap Esc.

- If there is a survey running, the azimuth for each computed inverse will be displayed, and you will be able to select whether to display Grid, Ground or Ellipsoidal distances using the Options softkey, with the computations based on the settings in the current job.
- Without a survey running, and therefore no orientation, the azimuth is not available for computed inverses and all computations are based on simple cartesian computations with a scale factor of 1.0.
- To configure the format of the grade display, tap Options.