3M ScanEM-C, Руководство пользователя

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11
EM Level LED Bar
The EM level bar is for relative estimates only and shouldn’t be used for
precise measurements.
The 3M
™
ScanEM-C Electromagnetic Near-Field Probe’s LEDs are spaced
on a somewhat linear scale. The figure to the right shows typical LED scale.
The scale is always relative to the green LED. On this scale, green LED is
always a reference point or “0
mV/m,” regardless of where the
Level dial is set. One should
be careful not to mistake the
situation when the LED bar is
overloaded with the second red
LED just turned On.
Figure B is provided for
reference only. Specification
is subject to change without
notice.
Operation as a Probe
1400
1200
1000
800
600
400
200
0
Green Yel 1 Yel 2 Red 1 Red 2
LEDs
m V/m
(relative)
CAUTION!
UNLIKE SOME PASSIVE PROBES, THE SCANEM-C PROBE IS NOT A REVERSIBLE DEVICE—DO NOT
SUPPLY A SIGNAL INTO ITS OUTPUT! IT CAN PERMANENTLY DAMAGE YOUR SCANEM-C PROBE.
Basics
The ScanEM-C Probe provides both AC and DC outputs to virtually any
piece of test equipment: spectrum analyzer, oscilloscope, frequency counter
or multimeter. Output is provided via an SMB connector and the supplied
cable. For some types of test equipment you may need to use additional
Figure B: Typical 3M
™
ScanEM-C Probe LED Response