A mobile radio testing device (10) for protocol testing of a device under test (20) is provided. The mobile radio testing device (10) comprises a downlink path (11) and an uplink path (13), wherein the uplink path (13) comprises at least a first analysis mode (15) and a second analysis mode (17). In this context, the mobile radio testing device (10) includes a demodulation processing unit (12) for analyzing signals from the device under test (20) in the first analysis mode (15). In addition, the second analysis mode (17) analyzes signals from the device under test (20) without using the demodulation processing unit (12) .