Racal Instruments 2461 User Manual page 195

User Manual 2461 Type C
The Time Interval is then divided by the Period and the result multiplied by 360 to scale the
answer for degrees. (Refer to Figure 5-3.)
(TI ÷ PER) X 360
Figure 5-3, Phase Measurement
Summary
To summarize, the automatic functions are designed to reduce the user setup time by
programming the 2461 Type C functions and signal conditioning parameters for typical
values appropriate to the measurement. For example, most pulse parameter
measurements are made on square waves or pulses, and the user would probably DC
couple the input to avoid slowing down the signal and so changing its characteristics prior
to measurement. Therefore, in Pulse Width and Rise/Fall Time modes, the 2461 Type C
defaults to DC coupling.
Because of the default conditions and disallowed set-up parameters on the automatic
functions of the 2461 Type C, care needs to be taken when designing drivers or soft panels
to ensure that correct transitions are made when changing functions or changing signal
conditioning parameters.
B-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com