Operator`s manual

3-9
NOTE
Resolution decreases with each step of digital magnification.
The reticle has a built in compensation to shift and stay on the target
during digital zoom operations as depicted in Figure 3.9.
FIGURE 3.9. ZOOM
NO ZOOM
RETICLE ON TARGET
2X ZOOM
RETICLE SHIFTS 2X
4X ZOOM
RETICLE SHIFTS 4X
3.2.7. MANUAL IMAGE REFRESH / CALIBRATION
Degradation of the image (image blurring) is caused by charge
accumulation on the detector array.
To use the calibration icon go to ISM Reticle menu and push down
arrow button to maintain an optimum thermal image. During this
refresh, the video will freeze for approximately 0.5 second.
IMPORTANT:
To Perform calibration of unit. Cover front lens with cap or
hand and push Calibration button to calibrate image. Fail-
ure to do this step may result in degradation of the image.
Degradation may consist of unusual blurriness or ghost
like spots in the image. During use if you see any degrada-
tion of image please recalibrate the scope.
Perform a calibration upon every substantial environmental tem-
perature change.
NOTE
While performing very frequent Refreshes can provide the
best possible image quality but also can substantially decrease
the battery life.