You can use the Hitec Programmer to measure the pulse-width at any position. While this information is interesting it not directly usable to correlate the required servo programming parameters.

Best case is to use the TX and the programmer hand in hand in what I refer to as ITERATION methodology.

Zero the TX trims and sub-trims. Connect the servo to the TX and RX channel in play for the specific servo. Note where it centers NOW and what direction is needed to move the arm to center the servo or make it perpendicular to the servo case. Connect the servo to the programmer, select program “epaneu” , roll the knob to 1500us make sure the servo arm is as close to perpendicular as possible now! Move the servo 3us in either direction (write down whatever you end up at (1503) hit the center save button and now arbitrarily set the end-points anywhere in both directions. Reconnect to the RX and note how close you are now as compared to previously. From here you can ascertain if you moved the servo in the right direction or not and if you need to move the arm more or less to center the servo using the recorded pulse drive numbers add or subtract as required. From here reconnect to the programmer and start over, it’s a hit and miss numbers game from here, takes a few minutes to get used to the process but once you’ve worked through it a few times it goes real fast. End-points are set up the same way. Make sure the EPA/ATV or travel volume percentages are equal in either direction first.