Kingfisher KI 7010B Series, Operation & Maintenance Manual

Page: 13 / 46

KI 7010B-UM-11
11
SIMPLE OPERATION-MANUAL AND STEP MODES
To achieve the simple level of operation, connect Light source and
Power meter with a patch lead and turn both instruments on. After the
stabilisation period, set a reference (so that the meter reads 0.00 dB)
and then connect the Attenuator between the source and meter. Turn
on the Attenuator.
For correct display of attenuation, the calibration wavelength on
Attenuator should be set to the appropriate window (e.g. 850,1300 nm
for multimode or 1310,1550 nm for single mode) corresponding to
Light source operating wavelength. The calibration wavelength is
displayed on the top left of the LCD. To select calibration wavelength,
press [

], then [-/+] button. Press [SET] to set the required wavelength.
If the wavelength is selected incorrectly, the displayed attenuation will
be inaccurate.
Once the wavelength has been fixed, the attenuation level can be also
set as required with the [-/+] button. To return to wavelength selection,
press [MENU].
The instrument sets the requested attenuation level with an internal
motor drive. While th e motor is in operation, a ‘BUSY’ in dicator will
show on the LCD.
The attenuation can be set outside the calibrated range, in which case
‘HI’ or ‘LO’ will be displayed. Note that some instrument functions are
locked out when ‘HI’ or ‘LO’ are displayed.
If the operating wavelengths of the source, meter and calibration
wavelength of attenuator are correctly set, the meter and attenuator
should display similar readings, with discrepancies caused mainly by
connector uncertainty. Note that any source drift will also cause extra
reading variations. The attenuator reading displays the complete
instrument loss, including the average optical connector loss.
The user can define attenuation step size in increments of 0.05 dB
from 0.05 dB to 10 dB.
This is very useful feature, when performing linearity tests or simply to
speed up operation, if the default step size of 0.1 dB is not convenient.
For example, when testing optical power meter linearity, the step size
might be set to 10 dB.
To operate in the step mode, simply press [POWER] [

] [-/+] [SET]
and then [STEP] button. Pressing the [-/+] button will now increment
attenuation according to the previously used step size.
To view the current step size, press [SET STEP] button.
To change the step size, press the [SET STEP] button, then use [-/+]
button to display the required step size, and press [SET] to store. The
unit will now operate in step mode, using the new step value.
To exit this mode, press [MENU].