ETS-Lindgren 5411 GTEM! Test Cell - Manual (Page 11)

Introduction
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H
IGH
V
OLTAGE
P
ULSE
F
EED
The GTEM! is typically used for CW emission and immunity tests. It can also be
used for high voltage pulse radiated immunity measurements. The High Voltage
Pulse Feed (HVPF) is a replacement feed section supplied for use with
Model 5405 and larger. The HVPF is available as a bolt-on (standard) or
clamp-on section. In both cases, the septum is fitted with an edge connector,
which makes removal of the complete CW section possible without disassembly.
The standard 7/16 to N adapter fitted to the front of the CW section is designed
for CW RF use and can be used for RF voltages up to 800 volts. The dielectric
withstand voltage for the connector is 2.3K volts. The voltage at the connector of
this feed section should not exceed 2.3K volts since it will be impossible to
predict when breakdown will begin to occur. The potential for breakdown
increases as a function of the humidity level, pulse width, and voltage magnitude.
While it is possible to use the CW section for very short duration pulses greater
than 2.3K volts, it is recommended that for pulse measurements where the peak
voltage of the pulse is expected to exceed 3K volts regularly, the HVPF should
be used.