HMM Discharge:

Actual HMM discharge; standing on a Teflon sheet for insulation
 Subject is charged by touching high voltage supply output through
a high meg charge resistor
 Subject disconnects from HV supply and immediately touches
metal rod in hand to ESD target in center of ground plane to
discharge himself (HMM event).
Gun Discharge Tests:

Typical ESD gun discharge into ESD Target; Radiation measurements
made with ESD Target, TEM, and Loop antennas.
Loop Sensors:


Large and small H field loop antennas as mounted to
large ground plane.
These H-field sensors are without integrator and
measure di/dt of H-field passing through it.
H Fields with Loop 3 (small loop, diameter 7/16”)
Power Spectral Density, Loop 3, 2 kV
-20
-40
-60
dBm/Hz
-80
-100
-120
Gun 1
Gun 1 One Hand
Gun 1 180 rotate
HMM JEB Extended Arm
-140
-160
-180
0
1
2
3
Frequency (Hz)
4
5
6
9
x 10
Ground Plane:



Ground plane measuring 2M or 1Henry (Leo G Henry)
TEM Horn visible at upper right edge of ground plane
Power Supply and Voltmeter used for Human Charging
Radiation Measurements:
5
4
Gun2 +4KV
Gun1 +4kV
Jon +4KV
3
2
1
0
-1
-2
-2.00E-09

0.00E+00
2.00E-09
4.00E-09
6.00E-09
8.00E-09
1.00E-08
Comparison of Real HBM and ESD gun E-Field
Radiation measured with TEM Horn