User’s Manual for Palm Optical Fiber Tester
Shineway Technologies, Inc.
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3.4.2 Keypad Functions
[
On/Off
]
Power on and off the instrument. With default setting, OPM-10/OPM-15 will
automatically turn off if no key is pressed for 5 minutes.
[
dB/dBm
]
For OPM-15, press this key to switch the measurement mode between
absolute power (dBm) and relative loss (dB). Hold the key until "HELD" is displayed
(approximately several seconds) switches to
µ
W mode.
[
Zero
]
Press this key, OPM-10/OPM-15 will start automatic zeroing.
[
Ref
]
Press this key to display the reference value stored in memory. Hold the
key
down until "HELD" appears in the display (approximately several seconds), and store this
value in internal memory as the reference power level. When OPM-15 is switched to dB
mode, LCD displays the difference in dB between the reference level and the current input
signal.
[
λ
]
Press the key to select the wavelength, which must be consistent with the
wavelength of the optic fiber to be measured.
[
External Power Supply Indicator]
When the indicator is on, the instrument is
using external power supply.
For OPM-10, there is no function of relative measurement, then
[µW/dBm]
becomes
the key to switch between units of
µW
and
dBm
.
