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1. How can I correlate the scan results to PCB design?
EMxpert support three types of file formats: Gerber file format RS-274x, HPGL and JPG. On rare
occasions, a Gerber file may not be in a pure RS-274x format and cannot be read by EMxpert software.
This file can often be read by a third party Gerber reader such as GerbView and converted to an RS-
274x format that can be used. GerbView can be obtained at
http://www.softwarecompanions.com/
.
2. Does the system require annual calibration?
The EMxpert ERX+ | EHX+ require calibration after shipment. Annual calibration is recommended.
In the ERX+ both the built-in spectrum analyzer and the step motors are tested; for the EHX+ only
the spectrum analyzer is tested. Please refer to the 3-year (part number 3000-1910) and 5-year
Calibration Assurance Plans (part number 3000-1911).
3. What is the frequency and amplitude accuracy of the EMxpert measurements?
The frequency accuracy of the internal spectrum analyzer is ± 1.0 x 10–6 per year Aging Ac
aging. For example at 1Ghz the error would be about 1kHz per year.
The amplitude accuracy of the internal spectrum analyzer is ± 2.00 dB from 100 kHz to 3 GHz and
± 2.75 dB from 3 GHz to 8 GHz.
The accuracy of the probe compensation values is ±3dB from 150kHz to 8GHz.
4. What are the Minimum System Requirements?
•
CPU 333 MHz or faster
•
256 MB recommended for EHX+, and 8 GB recommended for ERX+
•
8 MB Video or more
•
Windows 7/8/8.1 OS
•
10/100 Network Card
5. What is the maximum power level that EMSCAN’s patented scanner can receive
without being damaged?
The surface of the scanner can handle thousands of volts. The scanner is rated for a radiated load of
10 W or 40 dB. If a transmission line carrying RF power of more that 10 W / 40 dBm is placed close
to the scanner probe for extended periods, it is likely to damage the scanner.
6. How sensitive is EMSCAN’s patented scanner?
EHX sensitivity: -130 dBm to 35 dBm based on the best performing spectrum analyzer. Final results
are pending for EHX+ and ERX+.
(* 40 dB LNA; ** 38 dB Power amplifier (Please refer to
Technical Bulletin #15
for the test setup))
EMxpert Software
Appendix - FAQ
Frequency (MHz)
Sensitivity
Sensitivity with 40 dB LNA
-10
0
0.15
-25
-15
0.5
-45
-25
1
-90
-68
300
-95
-75
696
-100
-79
1500
-100
-83
2000
-130
-85
2600
-95
-85
3000
-100
-86
3500
Frequency (MHz)
Sensitivity
Sensitivity with 38 dB Power Amp.
-91
-78
4000
-85
-68
4500
-90
-70
5000
-88
-75
5500
-85
-70
6000
-90
-65
6500
-85
-70
7000
-70
-60
7500
-63
-60
8000
