CCS Standardfunction   Frequenz [Hz]
 

Frequenz [Hz]

MaxSignalAmplitude [V]

TriggerEdgeA [p/n]

TriggerLevelA [V]

Timeout [s]

Description of Function

Measurement of frequency of a periodic signal.

Testing Points

Test point + Reference point

Parameters

MaxSignalAmplitude

Largest amplitude occurring on the signal. Can be used to establish the measurement range or to select a suppressor circuit.

TriggerEdgeA

Specification of which signal edge is to act as trigger; n = negative edge, p = positive edge. The preferred option for frequency measurement is the negative edge.

TriggerLevelA

Trigger level for measurement relative to the Ground potential applicable for this signal.

Timeout

If the test function receives no measured reading input within the period specified for the timeout, the measurement is aborted.

Standard value: 1s

Example

Frequenz

15,n,7,1


Diagram:


Ulow

Low potential of test signal

Uhigh

High potential of test signal

UTr,n

Trigger level, negative edge

Tf

Period Tf

Figure 7: Frequency measurement

Trigger level: UTr,p/n = 0.5(Uhigh - Ulow) + Ulow