OPERATION
LSM 510
Annex
B 40-051 e 07/98
4-193
The single steps to find the right setting of all the parameters to be set are listed in the following:
Activate the <Range Indicator>
Adjustment of
Amplifier Offset
: the Offset of the PMT channel and diode channel have to fit to
each other to guarantee the best noise reduction.
The best way to do the adjustment is the following:
Choose different colors in <Configuration Scan> for PMT and diode channel
Activate <Line Scan>
Switch off all laser lines in the <Excitation> window
Activate <Cont>
Set values for Ampl. Gain to 1 in each channel
set the lines visible to the same level as close to the ground level as possible; the values you find for
the Offset in each channel should be negative.
A final adjustment of the offset adjustment is done by visually evaluating the noise reduction in the ratio
image. As the Offset value of the PMT channel influences the range setting of the ratio image much less,
than the Offset value of the diode channel the fine tuning should be done with the PMT offset if
necessary.
☞
As told before, the calculation of the ratio image is very sensitive to different signal offsets in
the two channels used. As the offset is influenced by the scan speed as well as by the Amplifier
Gain used, the offset calibration is not valid any more, if the scan speed is changed, or the
Ampl. Gain is set to a new value respectively. In most cases a new fine tuning is necessary. If
this doesn’t work the complete calibration process has to be repeated.
Another possibility to calibrate the offset values is to set the values to -0.1 as default for both channels,
then do steps 3 and 4 and finally do the adjustment of the noise reduction by varying the PMT offset
value.
If the ratio application is used and the offset has been set to the best reduction of noise in the ratio
image it is not allowed to change the offset of the PMT channel to change the reduction of background
fluorescence for example. This can be done only if the diode offset is corrected afterwards.
Adjustment of Detector Gain
The Gain of the PMT should be set with the help of the range indicator function. No ‘red ’ and no ‘blue’
pixels should occur in the image of the PMT.
Содержание LSM 510 Inverted
Страница 1: ...I LSM 510 Laser Scanning Microscope Operating Manual...
Страница 4: ...INTRODUCTION LSM 510 IV B 40 051 e 07 98...
Страница 10: ...INTRODUCTION LSM 510 X B 40 051 e 07 98...
Страница 12: ...NOTES ON DEVICE SAFETY Contents LSM 510 1 2 B 40 051 e 07 98...
Страница 22: ...NOTES ON DEVICE SAFETY Warning and information labels LSM 510 1 12 B 40 051 e 07 98...
Страница 24: ...LSM 510 SETUP REQUIREMENTS Contents LSM 510 2 2 B 40 051 e 07 98...
Страница 34: ...LSM 510 SETUP REQUIREMENTS Laser Module VIS Laser Module UV LSM 510 2 12 B 40 051 e 07 98...
Страница 36: ...INTRODUCTION TO LASER SCANNING MICROSCOPY Contents LSM 510 3 2 B 40 051 e 07 98...
Страница 46: ...INTRODUCTION TO LASER SCANNING MICROSCOPY Performance Features of the LSM 510 LSM 510 3 12 B 40 051 e 07 98...
Страница 48: ...INTRODUCTION TO LASER SCANNING MICROSCOPY Contents LSM 510 3 2 B 40 051 e 07 98...
Страница 58: ...INTRODUCTION TO LASER SCANNING MICROSCOPY Performance Features of the LSM 510 LSM 510 3 12 B 40 051 e 07 98...
Страница 231: ...OPERATION LSM 510 Annex B 40 051 e 07 98 4 173 Fig 4 171 Change over of the Scanning Module...
Страница 256: ...INTRODUCTION TO LASER SCANNING MICROSCOPY Contents LSM 510 5 2 B 40 051 e 07 98...