X8712AD RF Detector
This section illustrates and explains the difference in RF energy transmission between the two types of DUT presented in the N6705C Two-Channel Configuration.
The X8712AD RF Event Detector is a 1x2 power divider with built in log detector that allows for connection to the Device Under Test and a companion device or only the Device Under Test. The output of the log detector is voltage that is proportional to the RF input.
It is recommended to terminate the unused RF input of the Event Detector with a 50 ohm load when it is not connected to a companion device.
- 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.
- When the N6785A SMU module is installed in Channel 1, it will disable Channel 2 automatically and you will not be able to measure RF signals.
The 1x2 divider within the X8712AD responds and produces different power levels for the uplink signal from DUT and downlink signal from pairing device. The attenuation for 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 breakdown current consumption by transmit or receive mode.
