ZEISS Start-Up and Operation Primovert
36 415510-7244-001 12/2014
AET / AGC
AET (automatic exposure time) and AGC (auto gain control) automatically ensure the correct
brightness of the image when the setting is at Continuous.
The settings are Once / Continuous / Off.
In some situations (e.g. strong contrasts on the specimen) the automatic setting may cause the
image to be under-
or overexposed. In this case the automatic setting can be deactivated by
switching to Off.
A shorter exposure time with higher amplificatio
n (= more noise, but smoother live image) or a
longer exposure with lower amplification (= less noise, less smooth live image) can be selected in
Off mode.
In Once mode a one-time automatic adjustment will be carried out when confirmed with OK,
but then deactivated again.
Auto level
Influences the AET / AGC control when Continuous mode is set.
Extreme left: very dark image
Extreme right:
very light image
Exposure
The exposure time can be set within the range 20 µs to ~2s. The exposure time may be set
automatically or manually. Manual setting is possible by selecting the AET / AGC control in Off
mode.
Extreme left: 20 µs
Extreme right:
2000 ms (2 s)
Gain
The sensor amplification function can be set within the range 1x to 8x. Sensor gain may be set
automatically or manually. Manual setting is possible by selecting the AET / AGC control in Off
mode.
Extreme left: no increased amplification
(less image noise, less light sensitivity of sensor)
Extreme right:
maximum amplification
(strong image noise, high light sensitivity of sensor)
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