User's Manual

Spectra Precision Focus 4 Total Station User Guide 63

Applications 4

Sighting the backsight by entering coordinates

1. To enter coordinates for the backsight point (BS),

press

[1] or select Coord from the Backsight

screen.

2. Enter the point name. If the point exists in the

job, its coordinates are shown.

3. If you intend to take a distance measurement to the BS, enter the height of

target in the HT field.

4. Sight the BS, and then press

[ENT] to complete the setup.

If measuring to a known coordinate BS, press

[DSP] to display a QA screen. The QA screen shows

the dHD and dVD values, which indicate the

difference between the measured distance and

the distance calculated from the known

coordinates.

5. To record the station, press

[ENT].

6. To finish the station setup after taking a distance measurement, press

[ENT].

HA Azimuth calculated by

coordinates

Y0 Yb

Backsight point

(Xb, Yb, Zb)

Station point

(Xi, Yi, Zi)

Instrument height