OM120N-I Operating instructions:
Control Key’s: (All key’s are rubber key pads)
1.
On\Off
2.
Backlight
3.
Wavelength Select (850nm, 1300nm, 1310nm, 1490nm, 1550nm & 1625nm)
4.
dB\dBm with mW Displayed
5.
Set Resolution in dBm mode or Zero reference in dB mode
Backlight Key allows the user the option to turn the display backlight on.
The Wavelength select key allows the user to select between the calibrated wavelengths
of the OM120N-I. All wavelengths are calibrated to +/- 0.3 dB of the NIST standard.
The dB\dBm select key allows the user to select between absolute power, which is
measured in dBm, or relative power that is measured is dB. dBm is referenced to 1
milliwatt and both are a function of the log scale.
The Rez key when in the dBm mode allows the users to toggle the resolution between
0.01dB and 0.1dB.
The Zero reference key when in the dB mode allows the user to set the input launch
power to a relative dB zero reference value for easy calculation of loss and attenuation of
a fiber optic cable. For instance, if a launch cable output power value is –5.6 dBm and a
test cable is inserted between the launch cable and the meter with a reading of –7.1 dBm,
the user has to subtract –7.1 dBm from –5.6 dBm to get a result of –1.5 dB. As simple as
this test sounds it can sometimes get confusing to the user due to the fact that they are not
sure if their result should be a positive value or a negative value also miscalculation can
be an issue. The zero reference function eliminates these problems. The user simply sets
their reference value (which in this case is –5.6 dBm) to 0.0 dB then inserts the test cable
to get a loss reading of –1.5 dB. *EASY*
Different references can be stored for all four wavelengths. The stored reference value
will be maintained until a new reference is stored.
The screen also displays the value that the user has referenced too at the bottom left
corner of the screen. This reading is the dBm (absolute) value of the users dB zero
reference value.
* The OM120N-I also offers an auto power down feature. This is selectable on power up.
User can select one of three options
1) no Auto Power off 2)AO10 – power down
after 10 minutes 3) AO30 – power down after 30 minutes.
Advanced Fiber Solutions, Inc.
19 Norfolk Ave, Easton, Ma 02375, USA
Fax: (617) 507-0784
email:[email protected]
Ph: (508) 238-7100
url:www.afsi.us
Product:
AF-OM120N-I
Date: Mar:2013
Rev: 01
