Tektronix hctek4321 ruggedised transit case tektronix hctek4321 p the tektronix hctek4321 is a ruggedised transit case specifically designed to provide travel and storage protection for many products the case protects instruments from shock vibration and moisture and provides room for associated accessories such as probes adaptors and manuals p p the case accommodates the following product series p p tds200 br tds1000 tds1000b tds1000c edu br dpo2000 mso2000 tds2000 tds2