Leica DMLB Bedienungsanleitung Seite 61

Possible errors
Picture too dim (noisy TV picture, poor contrast).
Remedy: Increase lamp intensity, swing filter out
of light path, switch over beamsplitter in tube
system, switch TV camera to higher sensitivity.
Picture too bright (TV picture glare).
Remedy: Switch neutral density filter, switch
over beamsplitter in tube system, reduce
camera sensitivity.
Picture area too small.
Remedy: Use a TV adapter with a smaller factor.
Incorrect colour rendering.
Remedy: Vary illumination intensity, carry out
white balance for TV camera according to
manufacturer's instructions, use a conversion
filter, e.g. DLF.
Disturbed picture frame.
Remedy: Earth the microscope, Variotube and
camera. Avoid parallel laying of mains and
signal cables; connect camera and microscope
to the same mains phase (socket).
Picture spoilt by inhomogeneous glare and/or
spots. Lamps or windows are reflected in
through the eypieces.
Remedy: Switch over the beamsplitter or cover
eyepieces or remove the disturbing light source.
Dirt particles in the light path, lamphousing not
centered (TV systems are generally more sensi-
tive to inhomogeneous illumination).
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