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Fiber Optic Test Meters • Operation 8
9
OPM4 Models
Ref. # DescRiption
1
Battery status indicator - displays estimated battery life remaining. The 3 bars indicate
the charge level. When the battery is low, the battery indicator will flash.
2
REF indicator - appears to indicate previously stored reference value(s).
On the Ref key press, the reference indicator REF
2
and reference value(s) for the currently
selected wavelength or detected WAVE ID wavelength(s) will be displayed briefly (for about 2-3
seconds).
CW mode - the reference value will be displayed in the field
5
.
Single WAVE mode - The reference value will be displayed in the field
5
.
Dual WAVE mode - The reference values will be displayed in the fields
5
and
7
.
Tri WAVE mode - The reference value will be displayed in the field
5
and
7
on the first
page and in the field
5
on the second page (replaces first page automatically in ~ 2 seconds).
3
WAVE ID indicator - Will be displayed if the OPM4 is receiving a wavelength ID’d light.
4
CW mode - This field displays the currently enabled wavelength.
Single WAVE mode - This field displays the detected WAVE ID wavelength.
Dual WAVE mode - This field displays the first detected WAVE ID wavelength.
Tri WAVE mode - This field displays the first WAVE ID wavelength and the third WAVE ID
wavelength that is shown on a second page (replaces first page automatically in ~ 2 seconds).
5
This field displays measured power dBm or µW or insertion loss dB at the wavelength displayed
in the field
4
.
If power or loss is too high or low for the OPM4 to measure, this field will display HI or LO.
6
CW mode - This field displays modulation frequency if detected.
Dual WAVE mode - This field displays the second wavelength.
7
Dual WAVE mode - This field displays measured power dBm or µW or insertion loss dB at the
wavelength displayed in the field
6
.
If power or loss is too high or low for the OPM4 to measure, this field will show HI or LO.
8888
Hz
-88.88
dB dBm
nm
µW
WAVE ID
REF
1
2
3
4
5
6
-88.88
8888
dB dBm
nm
µW
Hz
-88.88
8888
dB dBm
nm
µW
WAVE ID
REF
1
2
3
4
5
7
6
Single WAVE mode, or
Tri WAVE mode - second page
Dual WAVE mode, or
Tri WAVE mode - first page
Display Readings in Test Mode
8888
Display Readings in Test Mode
The following table lists descriptions for the LCD display readouts in various modes of
operation.
WAVE ID
nm
µW
Hz
nm
dB dBm
µW
dB dBm
WAVE ID
nm
µW
nm
dB dBm
µW
dB dBm
Single WAVE mode, or
Tri WAVE mode - second page
Single or Dual WAVE ID mode
REF
REF
Hz
C
D
E
F
G
H
F
G
H
I
C
D
E
Figure 4. FPM 101 Display
Item Field Description
a
Battery status indicator Displays the approximate remaining battery life. Three bars indicate the charge
level. When the battery indicator flashes, the batteries should be changed
immediately.
b
REF indicator Press the Ref/Set button to toggle through stored reference values. The reference
values for the currently selected wavelengths are briefly displayed in the following
order:
CW mode: The reference value is displayed in field
e
.
Single WAVE ID mode: The reference value is displayed in field
e
.
Dual WAVE ID mode: The reference values are displayed in fields
e
and
g
.
c
WAVE ID indicator Lights when a wavelength has been identified using the WAVE ID feature with a
compatible light source.
d
Wavelength
CW mode: Displays the currently selected wavelength.
Single WAVE ID mode: Displays the detected WAVE ID wavelength.
Dual WAVE ID mode: Displays the first detected WAVE ID wavelength.
e
Power Displays measured power (dBm or μW), or insertion loss (dB) at the wavelength
displayed in field
d
.
If power or loss is too high or too low for accurate measurement, this field
displays HI or LO.
f
Tone / Wavelength CW mode: Displays detected tone modulation frequency.
Dual WAVE ID mode: Displays the second detected WAVE ID wavelength.
g
Power
(Dual WAVE ID mode
only)
Displays measured power (dBm or μW), or insertion loss (dB) at the wavelength
displayed in field
f
.
If power or loss is too high or too low for accurate measurement, this field
displays HI or LO.