Optical behavior, Function switch – Olson Technology LP-OR-304 User Manual
Page 7
LPOR-304 Operating Instructions
Revision A
4 June 2006
PAGE 7 of
10
OPTICAL BEHAVIOR
Six of the eight DIP switches (2, 3, 4, 6, 7, and 8) control the optical behavior of the unit. Switches 2
and 3 are used to set the wavelength of the two receivers. The user can select either 1310 nm or 1550 nm
independently for each channel. Switches 4, 6, 7, and 8 determine the optical input levels where the
receiver alarms switch. See Table 3 for details.
Function Switch
The pushbutton cycles through the following states by holding the button down for 0.5 second or
more:
• Automatic Mode (Redundant with Automatic Switchover)
• Force PRIMARY Rx Active
• Force SECONDARY Rx Active
(then cycle back to Automatic Mode)
The current state of the unit is stored in E
2
PROM in case of power failure. If power does fail, the last
valid state will be restored when power is restored.
Table 3 – Optical Thresholds
Switch 6 Switch 7 Switch 8 Switch 4 Green to Red Threshold
Red to Green
Threshold
OFF
OFF
OFF
OFF
-19 dBm
-16 dBm
OFF
OFF
OFF
ON
-19 dBm
-18 dBm
OFF
OFF
ON
OFF
-17 dBm
-14 dBm
OFF
OFF
ON
ON
-17 dBm
-16 dBm
OFF
ON
OFF
OFF
-15 dBm
-12 dBm
OFF
ON
OFF
ON
-15 dBm
-14 dBm
OFF
ON
ON
OFF
-13 dBm
-10 dBm
OFF
ON
ON
ON
-13 dBm
-12 dBm
ON
OFF
OFF
OFF
-10 dBm
-7 dBm
ON
OFF
OFF
ON
-10 dBm
-9 dBm
ON
OFF
ON
OFF
-7 dBm
-4 dBm
ON
OFF
ON
ON
-7 dBm
-6 dBm
ON
ON
OFF
OFF
-4 dBm
-1 dBm
ON
ON
OFF
ON
-4 dBm
-3 dBm
ON
ON
ON
OFF
-1 dBm
+2 dBm
ON
ON
ON
ON
-1 dBm
0 dBm