Com-Power PS-400 User Manual

Features

Complete Solution - Includes E and H field probes
Locate Noise Source - Down to a pin with the fine tip
Lightweight - Easy to use and handle
Small Size - Allows easy access to corners
Sensitive to Tip Position - Ease of pinpointing source
Immune to Hand Position - For repeatable results
Optional preamplifier

Near Field Probe Set

PS-400

Optional Preamplifier

Description

The PS-400 is a Near Field Probe set consisting of a tip
probe, a broadband probe, a H-field probe and a
custom storage case. Performance and ease of use
were designed into this product. The unique design
allows easy access for tight or hard to reach places
while reducing the effect of hand position or cable
placement.

The tip probe is a precision E-field probe that features
the ability to singularly identify a problem trace or pin.
It is designed to be extremely sensitive to distance
from the source which allows easy discrimination
between traces on a PCB. The unique patented design
allows measurement on individual traces as narrow as
3 mils.

The broadband probe is designed to identify E-fields
over a broad frequency range. In addition, it has more
amplitude sensitivity than the tip probe. Therefore, it
offers a quick and efficient diagnosis of an emission
source allowing the designer to discover and isolate
trouble areas quickly.

The H-field probe's magnetic loop design makes it
ideal for isolating sources of magnetic noise. The
shielded loop construction allows measurement to
minimize the effect of electrical fields.

Com-Power Corporation (949) 587 - 9800 www. com-power.com [e-mail]

Application

The PS-400 Near Field Probe Set is designed to assist
in troubleshooting EMI problems both at the board
level and at the component level. It is used to detect
radiation from cables, cases, traces and ICs.

Typically the broadband probe is used to locate the
general area of emission. Then the tip probe is used to
isolate the source to a specific trace or pin. Further
analysis can be done by following the noisy trace to
find the cause of emissions such as a broken transmis­sion line or impedance mismatch.

A typical use for the H-field probe is to verify the
integrity of the chassis of your computer. This is done
by moving the probe along the seams of the chassis
which may be acting as slot antennas. This probe is
also very useful for detecting magnetic noise sources
such as large current switching circuits or transform­ers.

By utilizing these probes, potential certification prob­lems can be discovered and addressed before expen­sive compliance testing is done. This saves both money
and valuable time. The net result is a reduction in
testing costs and a decreased time to market.

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Specifications

Probe H-Field Loop E- Field Broadband E- Field- Tip

Frequency Range: 0.3 - 100 MHz 20 - 1000 MHz 30 - 600 MHz
Dielectric Breakdown: 1kV typical 1kV typical 1kV typical
Operating Temperature: 0 to 40°C 0 to 40°C 0 to 40°C
Connector Type: BNC(f) BNC(f) BNC (f)

Optional Preamplifier

Model: PAP-501
Frequency Range: 10 MHz -1000 MHz
Nominal Gain: 20 dB ± 1
Pout @ 1 dB comp: + 6 dBm
Typical Noise Figure 6 dB
Output Impedance: 50 Ohm
I / O Connection: BNC (f) input, BNC (m) Output
Power Input: 12 VDC, 200 mA
Power input plug type: 2.1 (ID) x 5.5 (OD) center pin positve.
Weight: 1 lb. (0.45 kg)
Dimensions (L x W x H): 83 mm x 42 mm x 25 mm (3.27 " x 1.65" x 0.985")

Mechanical Outline

0.32 "

0.23 "

U.S. Patent # 5,132,607
Dimensions are given in inches
All values are typical unless specified
Specification are subject to change without notice

H-Field Probe Broadband Probe Tip Probe

0.6 "

1.2 "

4.3 "

4.8 "

0.23 "

0.6 "

2.3 "

3.4 "

3.9 "

0.1 "

1.7 "

3.3 "

3.8 "

0.6 "

Com-Power Corporation 20621 Pascal Way, Lake Forest, California 92630 (949) 587 - 9800 www.com-power.com Rev 1201

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