CALLISTO Receiver Testing
CALLISTO Receiver printed circuit boards (PCB) in Partially-Built and Ready-Built versions are tested on a laboratory test fixture. The test fixture is supplied by 28 Vdc, which is used to power an external noise source through a "hot/cold" switch and BNC connector. It also powers a small step-down linear power supply mounted inside the test fixture chassis. This power supply is adjusted to 12 Vdc for powering the PCB. The test fixture also provides a DB9-F connector for the EIA-232 interface. Click here for layout and schematic drawings associated with the test fixture.
For the Partially-Built version, the PCB is installed on the test fixture for preliminary as well as final testing. For the Ready-Built version, the PCB is installed on the test fixture for preliminary testing and then installed in the enclosure for final testing. The PCBs and Receivers are tested according to the procedures given in the CALLISTO Construction Manual.
The picture immediately below shows a completed PCB in-place for testing. An annotated view of the test fixture alone is provided below.
