Analog Devices ADRV9005 Reference Manual page 223

Reference Manual ADRV9001
POWER SAVING AND MONITOR MODE
into the monitor mode. The ADRV9001 triggers the wake-up pin to wake up a baseband processor once the carrier is detected in any detection
cycle.
Figure 197. Monitor Mode: Baseband Processor in Sleep and ADRV9001 in Alternate Sleep and Carrier Detection
The monitor mode uses the same power-down modes as System Power Saving (SPS) and they can use the same DGPIO as the power saving
trigger interface. Use either the SPS or monitor mode. These two modes can also be dynamically switched for different time slots. Send an SPS
or monitor mode API command to switch between modes. The ADRV9001 can buffer the latest incoming data in the monitor mode "detecting "
cycle. Then, once a valid incoming signal is detected, and the ADRV9001 wakes up the baseband processor, it can send out the buffered
receiver data to the baseband processor. This procedure ensures the baseband processor does not miss the valid incoming signal when it is in
the sleep state.
Detection Modes
Monitor mode supports five detection modes for use in different radio standards. The detection modes define under what condition the system
detects a valid signal and triggers the wake-up pin. Some modes are standard dependent.
There are three methods of detection of a valid signal: RSSI, DMR and FFT detection. RSSI detection can be used in conjunction with DMR
detection and FFT detection to make dual-detection modes. All five detection modes are described in the following sections.
Figure 198. Monitor Mode Detection Modes
RSSI Mode
The "RSSI" detection mode is radio standard independent. The RSSI detection mode settings are independent of the standard receive mode
RSSI settings outlined in *RSSI*, however both settings are similar to each other. The number of measurements to average, the measurement
duration and the measurement start period are configurable. The detection threshold is also configurable (between −98 dBFS to 0 dBFS) which
defines the level for when the signal RSSI power contains a valid signal.
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