I am testing my IoT device equipped with Digi XBee3 LTE-M/NB-IoT modem. My device currently connects to the AT&T CAT-M1 network, and I am getting RSRP around -100dBm and RSRQ around -13dB on Band 12 (700MHz) in my area.
I am trying to “simulate” bad signal condition to make sure the device is capable of recovering from IP network connection loss. If I add a RF signal attenuator to the antenna, I can make the RSRP drop below -120dBm and still maintain fairly good connection. I am wondering if there is a way to simulate bad RSRQ, i.e., to introduce noise to degrade the signal quality. I tried to wrap aluminum foil around the antenna, which only seemed to reduce RSRP, pretty much the same as adding a signal attenuator.
Ideally I’d like to simulate a condition where the LTE signal comes and goes. I don’t have a callbox.
Any suggestions? Thanks.