A method of authorizing a medical device for use, the method comprising: retrieving, from a diagnostic medical device, identification information that identifies a feature of the diagnostic medical device; generating a proprietary signal in response to the identification information; and sending the proprietary signal to a medical measurement system and unlocking of one or more proprietary analytic medical programs to be executed on the medical measurement system; receiving sensed measurements from the diagnostic medical device; and sending signals to the medical measurement system to be analyzed by the one or more unlocked proprietary analytic medical programs, the signals corresponding to the sensed measurements; wherein the one or more unlocked proprietary analytic medical programs include a fractional flow reserve calculation or an instantaneous wave-free ratio (iFR) calculation based on the sensed measurements, wherein: the diagnostic medical device includes a pressure guide wire; the medical measurement system includes a hemodynamic system; and the retrieving, the generating, and the sending are performed at least in part by an electronic interface device between the pressure guide wire and the hemodynamic system, wherein the proprietary signal is sent to the hemodynamic system through a channel which is also used for sending the signals corresponding to the sensed measurements to the hemodynamic system, wherein the hemodynamic system comprises a software configured to monitor incoming signals to check for the proprietary signal; wherein the proprietary signal is a frequency modulated or frequency dependent signal in a unique pattern and/or a pulse width modulated or pulse width dependent signal in a unique pattern and/or an amplitude modulated or amplitude dependent signal in a unique pattern and/or a capacitive signal in a unique pattern. retrieving, from a diagnostic medical device, identification information that identifies a feature of the diagnostic medical device; generating a proprietary signal in response to the identification information; and sending the proprietary signal to a medical measurement system and unlocking of one or more proprietary analytic medical programs to be executed on the medical measurement system; receiving sensed measurements from the diagnostic medical device; and sending signals to the medical measurement system to be analyzed by the one or more unlocked proprietary analytic medical programs, the signals corresponding to the sensed measurements; wherein the one or more unlocked proprietary analytic medical programs include a fractional flow reserve calculation or an instantaneous wave-free ratio (iFR) calculation based on the sensed measurements, wherein: the diagnostic medical device includes a pressure guide wire; the medical measurement system includes a hemodynamic system; and the retrieving, the generating, and the sending are performed at least in part by an electronic interface device between the pressure guide wire and the hemodynamic system, wherein the proprietary signal is sent to the hemodynamic system through a channel which is also used for sending the signals corresponding to the sensed measurements to the hemodynamic system, wherein the hemodynamic system comprises a software configured to monitor incoming signals to check for the proprietary signal; wherein the proprietary signal is a frequency modulated or frequency dependent signal in a unique pattern and/or a pulse width modulated or pulse width dependent signal in a unique pattern and/or an amplitude modulated or amplitude dependent signal in a unique pattern and/or a capacitive signal in a unique pattern. the diagnostic medical device includes a pressure guide wire; the medical measurement system includes a hemodynamic system; and the retrieving, the generating, and the sending are performed at least in part by an electronic interface device between the pressure guide wire and the hemodynamic system, wherein the proprietary signal is sent to the hemodynamic system through a channel which is also used for sending the signals corresponding to the sensed measurements to the hemodynamic system, wherein the hemodynamic system comprises a software configured to monitor incoming signals to check for the proprietary signal; wherein the proprietary signal is a frequency modulated or frequency dependent signal in a unique pattern and/or a pulse width modulated or pulse width dependent signal in a unique pattern and/or an amplitude modulated or amplitude dependent signal in a unique pattern and/or a capacitive signal in a unique pattern.