Will the DSP-100 measure test Category 5e

Regrettably, no. Category 5e requires ACR-F and PS ACR-F; the DSP-100 CableMeter is not capable of making these measurements. If you need to certify to category 5e, please take a look at the DTX CableAnalyzer. If all you need to do is to qualify that your existing links will support 1000BASE-T, the CableIQ may be a better choice.