A measurement instrument includes at least one input port and a measurement circuit. The input port is configured to receive a radio frequency (RF) signal from a device under test, wherein the RF signal comprises a symbol sequence. The measurement circuit is configured to receive the RF signal from the input port. The measurement circuit includes a reference signal circuit, wherein the reference signal circuit is configured to generate a reference signal based on the received RF signal, wherein the reference signal comprises an extracted symbol sequence corresponding to the symbol sequence of the RF signal. The measurement circuit further comprises an error circuit, wherein the error circuit is configured to determine error vectors based on the RF signal and based on the reference signal. The measurement circuit further includes an analysis configured to determine whether the reference signal is correct based on the determined error vectors.

A measurement instrument includes at least one input port and a measurement circuit. The input port is configured to receive a radio frequency (RF) signal from a device under test, wherein the RF signal comprises a symbol sequence. The measurement circuit is configured to receive the RF signal from the input port. The measurement circuit includes a reference signal circuit, wherein the reference signal circuit is configured to generate a reference signal based on the received RF signal, wherein the reference signal comprises an extracted symbol sequence corresponding to the symbol sequence of the RF signal. The measurement circuit further comprises an error circuit, wherein the error circuit is configured to determine error vectors based on the RF signal and based on the reference signal. The measurement circuit further includes an analysis configured to determine whether the reference signal is correct based on the determined error vectors.