|Connect the DSP-4x00 to your PC using the Serial Cable. |
Click on Utilities > DSP-4x00/LT CableAnalyzer > Software Version
You will then see:
The calibration date is displayed (it should be flashing above).
We are no longer able to offer calibration and repair for the DSP-4000 CableAnalyzer. It has been replaced with the DTX CableAnalyzer