ETS-Lindgren HI-4455 Isotropic Field Probe (Archived) - Manual (Page 15)

HI-4455 Isotropic Electric Field Probe
© ETS-LINDGREN L.P. – August 2005
Revision D- Part No. H-600076 15
3. OPERATION
This section discusses the theory of operation and the functions of the
HI-4455 Isotropic Field Probe. A high-level block diagram (Figure 3) is
included to aid the discussion. The objective is to provide information
enhancing user understanding of the design of this probe.
SYSTEM THEORY
The HI-4455 Broadband Isotropic Electric Field Probe utilizes a
microprocessor for intelligent operation and control. The probe's self-
contained power supply employs a 3.6 VDC NiCd battery, which
provides up to 17 hours of continuous operation.
For each axis, the probe measures the radio frequency signal level and
generates a linearized reading of the measurement. A vector addition is
performed on these three readings: the result is transmitted to the
readout over glass fiber optic cables. See "Probe Operation" for a more
detailed explanation of the functioning of the HI-4455.
The probe relays data to the readout via either a short form or long form
output word. See Appendix B for details on both output word formats.
For some limited, specialized applications, you may use any computer
with an RS232 serial port to communicated directly with the HI-4455 via
ETS-Lindgren’s optional HI-4413P Fiber Optic/RS232 Interface.
Archived 4/2/10