Readback Requirements
EasyCal can take readback from either:
- The device under test or:
- The calibrating instrument
The instrument providing the readback must:
- Be equipped with an RS232 serial port or a GPIB port (the PC running CalRun will also need a GPIB port in this case)
- Have a suitable cable for connection to a PC. In the case of GPIB instruments, this will be normally be a standard GPIB cable. In the case of an RS232 serial cable it will often be either supplied with the instrument or as an option. If not, the specification for the cable should be found in the instrument’s user manual.
In addition, you need to know:
- What RS232/GPIB command must be sent to the instrument to perform a single readback (e.g. “:MEAS?” is often used for SCPI-compatible instruments)
- The format of the readback data that is returned by the instrument, e.g. “the readback value then a comma then an error code, terminated with ASCII character 10”
This information is specific to each type of instrument. It should be found in the user manual of the instrument.