Archived 4/2/10
HI-4456
Isotropic Electric Field Probe
User's Manual
Copyright © 1999 by Holaday Industries, Inc.
Manual #600075 2/00 $12.50
Revision Record
Archived 4/2/10
Manual #600075
HIn4456 Isotropic Electric Field Probe
Revision Description Date
--- Release 8/97
A Added CE Label 10/97
B Revised 1/98
C Changed Charger Specs 8/99
D Changed Area Code 2/00
TABLE OF CONTENTS
Archived 4/2/10
1.0 DESCRIPTION ...................... 1
Introduction ....................... 1
2.0 HInn4456 SPECIFICATIONS ............ 3
3.0 ACCEPTANCE AND CONTROLS ......... 5
Introduction ....................... 5
Unpacking and Acceptance ............ 5
Probe ........................... 5
XMIT/RCV .................... 5
ARM/OFF ..................... 6
CHARGER ..................... 6
Battery .......................... 7
4.0 BATTERY CHARGING ................ 9
Introduction ....................... 9
Charging Procedure .................. 9
Battery Tips ....................... 10
5.0 MAINTENANCE .................... 11
Introduction ....................... 11
Maintenance Recommendations ......... 11
Upgrade Policies .................... 11
Return Procedures ................... 11
Periodic/Preventive Maintenance ......... 12
Parts Information ................... 13
6.0 THEORY OF OPERATION .............. 15
Introduction ....................... 15
System Theory ..................... 15
Probe Operation .................... 17
Probe Power Supply ................. 18
Zeroing .......................... 18
7.0 APPLICATION CONSIDERATIONS ........ 21
Archived 4/2/10
Introduction ....................... 21
Out-of-Band Considerations ............ 21
Resolution Limitations ................ 21
Probe Support Structures .............. 21
APPENDIX A
ERROR CODES ......................... 23
Probe Error Output .................. 23
APPENDIX B
HInn4456 OPERATING PROTOCOLS .......... 25
Introduction ....................... 25
Communication Protocol .............. 25
Information Transfer Protocol ........... 25
Command Structure ................. 25
Commands ........................ 26
Probe Output ...................... 28
Limited Warranty
Archived 4/2/10
Holaday Industries, Inc. warrants each model HIn4456 Isotropic
Electric Field Probe to be free from defects in material and
workmanship for a period of one year from the date of shipment
to the purchaser. This warranty extends to the original purchaser
only, and does not apply to the batteries or to any products or
parts subject to misuse, neglect, accident, unauthorized service
or abnormal conditions of operation.
In the event an instrument covered by this warranty fails,
Holaday Industries, Inc. will, without charge, repair and
recalibrate the instrument if returned to their factory within one
year of the original purchase-provided that Holaday Industries'
examination discloses, to its satisfaction, that the product is
defective. Holaday Industries, Inc., may, at its option, replace
the product in lieu of repair. If the defect was caused by misuse,
neglect, accident, unauthorized service or abnormal conditions of
operation, repairs will be billed at a nominal cost. In such cases,
an estimate will be provided before work is started, if requested
by the purchaser.
For warranty service, contact Holaday Industries, Inc. Provide
the serial number of the instrument and complete details
regarding the failure mode. You will then be given either service
information or shipping instructions. Return the instrument to
the factory, transportation prepaid. Repairs will be made at the
factory and the instrument will be returned to you, transportation
prepaid. Holaday Industries, Inc., assumes no responsibility for
loss of, or damage to, products in transit.
Warning!
EXTREME CAUTION IS ADVISED WHEN WORKING IN
ENVIRONMENTS WHERE HIGH-INTENSITY ELECTROMAGNETIC
FIELDS MAY EXIST AND WHERE CONTACT WITH HIGH VOLTAGE
OR HIGH CURRENT CIRCUITS OR APPARATUS IS POSSIBLE.
ACCIDENTAL CONTACT WITH OBJECTS OR CIRCUITS OPERATING
AT HIGH VOLTAGES OR HIGH CURRENTS CAN BE LETHAL!
HOLADAY INDUSTRIES, INC. ASSUMES NO LIABILITY FOR ANY
DAMAGES OR PERSONAL INJURY WHICH MAY RESULT FROM
HIn4456 Manual Page — 1
Archived 4/2/10
1.0 DESCRIPTION
Introduction
The HI-4456 RF Electric Field probe is a broadband
isotropic sensor suitable for a wide range of
RF/microwave measurements. While the HI-4456 is
suited for many types of measurements within its
frequency range, it is primarily designed for measuring
pulsed fields such as are found in radar applications. The
thermal sensor elements respond accurately to a wide
range of signal waveforms, providing a true RMS
representation of the field waveform.
Applications include: health and safety monitoring, radar
transmitting antennas, and measuring any type of RF
pulsed radiation. The HI-4456 probe is optically isolated
to minimize field perturbation during measurements.
The HI-4456 probe assembly consists of a spherical
casing, containing the sensor, which is mounted on one
end of a shaft; the other end of the shaft is attached to
an extrusion which houses the electronics (Figure 1n1).
The sensor and electronics housing operate - and are
calibrated - as a unit.
The HI-4456 sensor consists of three mutually orthogonal
(perpendicular) electric field sensors. The electric field
components in each of these directions are summed as
vectors and the resultant field value (magnitude)
transmitted via the fiber optic cable to the receiver (HI4416 System Readout or HI-4413G RS-232 Computer
Interface).
The frequency response of the HI-4456 extends from
300 MHz to 18 GHz. Extended frequency calibration
points are available up to 40 GHz.. The dynamic range
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Archived 4/2/10
of the probe extends from 0.3 mW/cm2 to 265 mW/cm2.
Figure 1nn1
HInn4456 Probe
HIn4456 Manual Page — 3
Archived 4/2/10
2.0 HInn4456 SPECIFICATIONS
Dynamic Range: 0.3 to 265 mW/cm
2
Ranges: 100, 300, 1 000 Volts/meter full
scale
Frequency
Response: 300 MHz to 1 GHz +0, -3 dB
1 GHz to 18 GHz ± 1.5 dB
18 GHz to 40 GHz +0, -6dB
Linearity: ± 0.5 dB full scale (F.S.): ± 2 least
significant bits (LSBs) of A/D
converter
Isotropicity: 300 MHZ to 18 GHz ± 1.2 dB
18 GHz to 40 GHz ± 2 dB
Peak Overload: 30 W/cm
2
Pulse Energy
Density Overload: 150 W-µsec/cm
2
Environmental:
Operating
Temperature: 10 °C to 40 °C (50 °F to 104 °F)
Humidity: 5% to 95% relative humidity, non-
condensing
Fiber Optic Cable
Connectors: Standard FSMA
Battery: 3.6 VDC, 1400 mA-h rechargeable
Nickel-Cadmium (NiCd)
Page — 4 HIn4456 Manual
Archived 4/2/10
Battery Charger: 115/230 VAC, approximately 1 hour
Battery Life: 17 Hours continuous (full charge)
Probe Mount: ¼ n 20 UNC tapped hole (internal
thread) in base of probe
Size:
Length (including
electronics housing): 419 mm (16.5 in)
Probe diameter: 76 mm (3.0 in)
Weight: 0.54 Kg (19 oz.)
Optional Equipment: See Table 5n2
HIn4456 Manual Page — 5
Archived 4/2/10
3.0 ACCEPTANCE AND CONTROLS
Introduction
This section contains information on: unpacking and
acceptance of the HIn4456; probe controls; probe
connectors; the battery, and the battery charger.
Unpacking and Acceptance
Step 1. Upon delivery of your order, inspect the
shipping container(s) for evidence of damage.
Record any damage on the delivery receipt
before signing. In case of concealed damage
or loss, retain the packing materials for
inspection by the carrier.
Step 2. Remove the probe from its shipping
containers. Save the boxes and any protective
packing materials for future use.
Step 3. Check all materials against the packing list to
verify that the equipment received matches
that which was ordered. If you find any
discrepancies, note them and call Holaday
Customer Service for further instructions.
Be sure that you are satisfied with the contents of your
order and the condition of your equipment before
installing the probe.
Probe
A switch, two fiber optic connectors and a battery
charger connector are mounted on the HIn4456
electronics housing (Figure 3n1).
XMIT/RCV The fiber optic cable assembly from the
receiver is attached to the probe via two
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Archived 4/2/10
connectors. The cables are color-coded-white
for XMIT, yellow for RCV. Identically-colored
dots are located on the electronics housing
adjacent to these connectors. Be sure that
each cable is attached to the proper probe
connector.
Figure 3nn1
Switch and Connectors
When the fiber optic cables are not attached,
always cover the probe connectors with the
protective plastic covers supplied with the
unit, or with similar material. This prevents
dirt or other contaminants from entering the
connector and causing communication
problems.
ARM/OFF The ARM/OFF switch activates and
deactivates the probe. In the ARM position,
the probe is powered by its internal 3.6 VDC
NiCd battery: in the OFF position, the probe is
inactive. To prolong battery life, set the
ARM/OFF switch to OFF at the end of a test
sequence or when the probe is not in use.
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