OB1203 Certification Preparation, Setup, and Test Procedure
X0119984 Rev.1.0
Mar 11, 2021
Page 5
3.2.2.
Mounting the Reference Board and Opto-mechanical Test Adapter
The fixture is machined or printed as required to fit the case of the DUT, aligning the cross bar in the fixture with
the center of the OB1203, and not blocking the LEDs or detector. The fit must exclude external light. The DUT
must be mechanically aligned and securely mounted to the fixture.
3.2.2.1.
Opto-Mechanical Test Head Stack Up
1. Top: OB1203 Device Under Test.
The DUT must be mechanically attached and stable so that it cannot move.
Figure 9. Test Stack Up with Aluminum Foil Insert on the Receive Side of the DUT
2. Renesas Test Adapter.
The DUT must be aligned optically so that the light is un-obstructed in both directions. Pay special attention
to the alignment of the optical divider inside the cone because it must be in the correct orientation separating
the light between LEDs and Photo detectors with minimal crosstalk.
3. The Renesas test adapter should have at least one side of the cone covered with a reflective material such
as a layer of Aluminum foil. Please use the provided applicator and follow the instructions on inserting the
reflective layer into the cone.
The reflective side of the cone should be on the sensor side of the DUT
.
4. WhaleTeq Test Head.
The test head also has an optical divider eliminating crosstalk between the LED and photo detector. Please
ensure that the all dividers are aligned properly.
Figure 10. WhaleTeq Test Head with Optical Divider
