HP ESA-E Series Programmer's Manual page 246

Language Reference
SENSe Subsystem
Range: 2 to 10, limited to the maximum frequency range of the
analyzer
Remarks: This command sets the number of harmonics to
measure before computing the total harmonic
distortion. The minimum number is two (the
fundamental and the second harmonic).
Front Panel
Access:
MEASURE, Harmonic Dist, Meas Setup, Harmonics
5-92 Chapter 5