Kingfisher KI 7010B Series, Руководство по эксплуатации и техническому обслуживанию

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KI 7010B-UM-11
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ABSOLUTE / RELATIVE DISPLAY MODE
Absolute/Relative display mode is a useful feature to allow user
switching between these two modes depending on which value is
required.
Absolute attenuation value is displayed in dB. In relative mode, ‘REL
dB ’ shows on the top right side of the display.
Sometimes it is convenient to display attenuation relative to a
reference value, e.g.:
• The display is zeroed at a particular point, and subsequent
readings are relative to this.
• The display is set to an arbitrary value. For example, it can be
set to display the actual optical power coming out of the
attenuator when a light source is attached or to read total link
loss including the attenuator loss.
Setting up the attenuator to display actual power coming out
of it:
- connect a light source to the left port, and a power meter (for
referencing purpose only) to the right port of the attenuator.
Turn on all instruments and set them up with the same
wavelength.
- in Absolute display mode of the attenuator, set attenuation
level as required and press [ABS/REL] to switch to Relative
display mode. “REL dB” will show on the top right of the
display.
- Press [-/+] to adjust the attenuator’s display to the value corresponds
to the absolute value displayed on power meter, then press [SET] to
save setting. Note that negative value settings on attenuator are
invalid.
At this point, the attenuator has been setup to display its output
power at the current set attenuation level.
- press [-/+] now to change attenuation level by the default 0.1dB
decrement/increment, will result in the attenuator displaying its
output power which corresponds to the new attenuation level set.
- press [Step] to enter Step mode to increment/decrement attenuation
level in the pre-set step value.
The step value can be reset by pressing [SET STEP] followed by [-
/+]. Press [SET] to save setting.
To return to the default 0.1 dB increment/decrement attenuation
adjustment mode, press [MENU].
- To exit Relative display mode, press the [ABS/REL] button again or
[MENU].