Spectra Precision FOCUS 35 - Page 323

Chapter 6
Adjustment and Verification
P/N 79000035_SM, Version 1.5 6 - 69 Focus 30/35 Service Manual
5 Check Cross talk
Trouble shooting:
A. Mount the Light trap
tool on the Front lens.
B. Select
Cross talk
check
check box.
C. Click
Cross Talk
Measure and check
the Amplitude
External path/
Crosstalk.
D. Click
Stop to finnish
test.
If value is still too
high:
1) Check the
Transmitter and
Receiver adjustment.
2) Clean Front lens,
prism on Front lens
and wedge plate.
3) Check adjustment
of Receiver fibre to
APD signal
maximum.
Tolerance:
1,0
See
“Transmitter
Unit F30
adjustment /
Laser pointer”
on page 6-
51.and see
“Receiver fibre
adjustment” on
page 6-61..
See
“Adjustment of
Receiver fibre to
APD
maximum” on
page 6-73.
Clean the Front lens
and make sure the
Light trap tool is
cleaned. Dust and
fingerprints can affect
the result.
6 Check Signal/Noise
factor
A. Select
Signal noise
check
check box.
B. Click
Signal Noise
Measurement and
check Signal Noise
Factor.
Tolerance:
> 10
Trouble shooting:
If value out of
tolerance, check
receiver APD value
and reference signal.
7 Check distance
measurement in DR
mode.
A. Aim to a calibrated
DR target betwen 2,5
- 50m.
B. Select
Distance
measurement check
box.
C. Click
DR Measure
button. Check the
Distance and
Deviation while
running the EDM in
Tracking mode.
D. Click
Stop to finish
test.
Tolerance:
Distance <1mm
Deviation
3mm
Trouble shooting:
The red spot of
transmitter should
blinking periodically.
If no measurement is
possible, or the value
is out of tolerance,
check the Transmitter
adjustment, see Fig.
6-39 on page 6-54
and run EDM offset
determination, see
page 6-78.
Item Performance Action Result Notes