RSA306 USB Real-Time Spectrum Analyzer Demo Guide
5
Demo 2: ISM band DPX
The real time engine of the RSA306 series is designed to address the measurement challenges
associated with dynamic RF signals such as the bursted packet transmissions of WLAN and Bluetooth.
Combo devices that use both Bluetooth and 802.11b/g/n WLAN networks have a unique set of RF
interference problems because they share the same 2.4 GHz Industrial/Scientific/Medical (ISM) frequency
band. In this example, we will explore this real-world problem using a whip antenna.
1. In the Presets button.
2. Click the Display button.
3. Under the General Signal Viewing, select
DPX from the Available displays box.
4. Click the Add button. This will add the DPX
icon to the Selected Displays box (and
remove it from the Available displays box).
5. Click the OK button.
6. In the DPX display, set the CF to 2462 MHz or
to the center frequency of one of the WLAN
channels. See the quick tip below. Set the
Span to 40 MHz.
7. Select the Split view.
8. Set the RefLev to -40 dBm.
9. In the DPX display, and click the settings
button.
10. Under the Bitmap Scale tab, set the Max
scale to 3% for the DPX Spectrum Display.
11. Under the Ampl Scale tab, set the
Max color
scale to -40 dBm for the DPXogram Display.
Quick Tip: 2.4GHz WLAN Channels
There are 14 channels designated in the 2.4
GHz range (2400–2483.5 MHz) spaced 5
MHz apart. Channels 1(2412 MHz), 6 (2437
MHz), and 11 (2462 MHz) are the most
common channels to choose, and most
routers will use one of them as the default
channel.
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