operation manual Xenon XL-A100 / Xenon XL-M100
connecting and operating the equipment page 9
5.1 operating the equipment
5.1.1 operating the equipment without video input
switching on the equipment
After connecting the mains, the grounding conductor, the light cable and the endoscope, the
equipment is ready for use, and can be switched on at the mains switch. The green mains light
(Power) inside the switch will light up. After 5-10 seconds the lamp will automatically ignite. It will
burn with full power right from the start. At the same time the ventilator will start to run.
setting manual mode (only Xenon XL-A100)
Now you can set the mode: in this case manual regulation of light intensity. To set this mode, you
press the push button ‘MAN’ which will turn on this mode of operation. This will be indicated when
the green LED in the key lights up.
setting the light intensity
The output of light can now be adjusted either stronger or weaker by the push button ‘INTENSITY’.
If you press the push button ‘decrease intensity’, light intensity will decrease. Then intensity is
adjusted by a mechanical diaphragm with the result that the spectrum of white light does not
change when dimmed. When the diaphragm is completely open for maximum light intensity or
completely closed for minimum light intensity (when the respective key is pressed), this will be
indicated by the yellow LED light in the corresponding key.
5.1.2 operating the equipment with video input (only Xenon XL-A100)
switching on the equipment
Connections or wiring of the equipment: Besides the mains connection and the connection of the
light cable with endoscope, the video signal must now also be connect to the equipment.
The corresponding sockets are located on the rear panel of the equipment.
You can see the two sockets leading in (S-VHS Y-C, BNC).
The BNC socket is for connecting the standard so called Composite Video Signal, for example
CCIR-Norm, where there is colour and black/white information on a coaxial (two-lead cable). This
is the usual system with older colour and also black/white cameras, both of which can be connect
here.
The Y/C socket is for connecting the newer colour cameras, which work with the so called Super-
VHS System, or also Y-C signals. Here the picture brightness control (Y-signal) and colour control
(C-signal) are split, with the result that a 4-veined cable and a 4-pole plug is necessary.
Usually the signal coming from the video camera is fed into the VIDEO IN socket of the monitor
and then fed either from the VIDEO OUT socket of the monitor (if available) or using a T-
connection-adapter further on to the lightsource.
If shadow pictures appear on the monitor, because of a very long length of the cable, the video
signal must be terminated with a 75 Ω-termination-resistor so as to suppress the disrupting reflec-
tions in the cable.
In this case, the video signal is fed into the lightsource using a further T-connection-adapter. The
open end of the T-connection-adapter is fitted with the 75 Ω-resistor.
Basically only 75 Ωvideo cable should be used when connecting the equipment together, so that
you obtain the best picture quality.
After connecting the mains, the grounding conductor, the light cable and the endoscope, the
equipment is ready for use, and can be switched on at the mains switch. The green mains light
(Power) inside the switch will light up. After 5-10 seconds the lamp will automatically ignite. It will
burn with full power right from the start. At the same time the ventilator will start to run.
setting the camera
Standard video cameras usually have a so called AGC switch (Automatic Gain Control = automatic
control of the light). This switch should be switched of, when using the light source with video con-
trol, as otherwise there can appear uncontrollable variations in the picture brightness when in use,
because the AGC counteracts the control of the light source.
If the camera is a so called shutter-camera you should observe the following:
If the camera has only one possible shutter speed (e.g. 1/1000 sec.), then this should be set at off
during normal use, as otherwise the picture on the monitor will be very dark, because of much
shorter exposure time compared with normal use. If the shutter-camera, however, is fitted with a
floating shutter control, that means that it will, by changing the shutter speed, automatically adjust
