Th High Dynamic Range (HDR) mode assists the L-band tracking by using signal processing to reduce the effects of RF interference. Enabling HDR mode will improve rejection of erroneous signals which can impact the received L-band signal.
When HDR mode is active the processing and power load on the GNSS receiver will increase.
HDR Mode is Off by default. To enable or disable HDR Mode, navigate from the LD900 home screen to Configuration > Corrections > L-band then select Edit for the HDR Mode and use the arrow keys to select On or Off, followed by pressing the tick. Finally use the arrow keys and tick to select Apply, right to select Yes and tick to apply the change: