WCA380 Real-time spectrum analyzer for Debugging Bluetooth Design

Bluetooth is a frequency hopping system operating in a high-interference environment. Transient interference from other systems (such as 802.11) and commercial products such as microwave ovens can impair bluetooth transmission and reception. The set on time and settling performance of the hopping transmitter can be subject to design flaws in hardware (PLL settling time, amplifier leveling control, burst on/off ratio, etc). The WCA380, with the ability to capture signals in multiple domains, enables the user to evaluate the following:

• Transient interference over an instantaneous 30 MHz BW. The real time frequency domain triggering allows the user to establish a frequency domain mask to capture interference the instance it occurs. Pre and post event triggering allows to user to review the bluetooth signal and the interferer before, during and after the interference. Multiple-domain analysis enables the engineer to determine the effect of the interference on the phase, amplitude, frequency and symbols transmitted by the bluetooth transmitter.
• Oscillator and PLL performance evaluation: Real time capture allows detailed analysis of the signal with respect to time, frequency, phase and amplitude: Engineers can see the exact profile of the component and alter design parameters to meet their needs. (a picture of frequency vs. time should be provided here).