48
Overlay Editor
Please refer to
page 34
.
Signal Conditioning Tab
Internal Pre-Amp:
A pre-amp external to the built-in
spectrum analyzer but internal to the ERX+ l EHX+ is
OFF by default. Gain goes from 40 dB at 150 kHz to 15
dB at 8 GHz. Displayed amplitude levels are automatically
corrected for the gain value.
Level 1 is in fact the Level 2 gain attenuated by the 20 dB in
the spectrum analyzer attenuator. Do not turn ON the
Internal Pre-Amp to Level 2 if the displayed signal level
exceeds the threshold below with Pre-Amp OFF. Use the highest frequency in the span being measured.
Note that units are in dBm, not dBuV.
150 kHz – 50 MHz
50 MHz – 1 GHz
1 GHz – 8 GHz
-56 dBm
-48 dBm
-39 dBm
In fact when you turn ON the Internal Pre-Amp you will see the following message pop up; click OK if you
wish to proceed.
External RF Bypass:
When ON, the RF signal from the scanner bypasses the built-in pre-amp and
attenuator section and goes to the RF OUT port to which you can connect external devices such as
amplifier, attenuator, passband filter etc. You then connect the output of such external device into the RF
IN port of the built-in spectrum analyzer as long as the power into the RF In port does not exceed
-10 dBm
.
To correct the displayed amplitude levels for the gain or attenuation value, select the value from the drop
down menu or manually entering the value. When the External RF Bypass is ON, the Internal Pre-amp
is automatically turned OFF
Description Tab
You can name the node and add a description.
To run the scan once click
or to run the scan continuously
(available only at ERX Control Level 1) click
.
Once the scan is completed, an image of the scan will be displayed.
You can mouse over the graph to see coordinates, frequency
and amplitude data. By sliding the Set Color Threshold, you can
increase or decrease the contrast to more clearly identify current
loops and peak locations.
EMxpert Software
Spatial Scan
