Getting Started
1
Keysight X8712A IoT Device Battery Life Optimization Solution User’s Guide
17
X8712AD RF Event Detector
The diagram below illustrates and compares the difference in RF power
transmitted by the pairing device and DUT.
The 1×2 Splitter within the X8712AD responds and produces different power
levels for the uplink signal from DUT and downlink signal from pairing device. The
attenuation for the downlink signal path is higher, therefore the signal level is
lower. With the right threshold configuration, the software is able to differentiate
the uplink and downlink signals and use this to correlate with the current
consumption waveform to analyze current consumption by transmit or receive
mode.
Pairing Device
Downlink
DUT
Uplink
X8712AD
Shield Box
Refer to Note.
NOTE
The X8712AD RF Event Detector has a limit of +13 dBm. It is recommended to
add a fixed attenuator when you require an input power of more than +10 dBm to
avoid overstress.
Time
RF (dBm)
Downlink signal from Pairing Device
Uplink signal from DUT
Upper Threshold
Lower Threshold