OptoTest OP930D Quick Start Manual

AN-105
OP930D Functionality
Over view
The OP930D is a dual channel insertion and return loss tester. The OP930D is similar to the OP930 except an
additional source port and detector is added to streamline testing of duplex cables and to allow for simplified
testing of cables with unlike connectors. The test system has two source ports and two power meters. While Port A
and Port B are treated as two separate channels, they share the same source modules and are regulated by a 1x2
switch, activating on one channel at a time. The corresponding power meters are configured to expect readings
from their respective source ports when that source is switched on.
Functionality
1310nm
1550nm
850nm
Laser
1300nm
Laser
850nm
LED
1300nm
LED
The OP930D has one 1310nm and one 1550nm laser (850/1300 for multimode) that are both fed into a 1x2 switch.
This switch sends the selected wavelength into either Port A or Port B; not simultaneously. This switching is seen
in the front panel by the switching LEDs. When Port A is "on," the corresponding detector expects a measurement.
At this time, Port B is "off" and Detector B is frozen and does not look for any measurements. The same procedure
occurs when Port B is switched active.
OptoTest Corp.
1
4750 Calle Quetzal
Camarillo, CA 93012
Doc: AN-105 Rev. B 12 /13 /13
Singlemode Schematic
WDM Coupler 1 x 2 switch
Multimode Schematic
WDM Coupler
2 x 1 switch
WDM Coupler
Figure 1: Singlemode and multimode schematics for inside of an OP930
1 x 2 switch
to Port A
to Port B
to Port A
to Port B
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