Encoder Frame Divider Measurement

In line scan cameras, the encoder frame divider measurement feature gets the measured period of the frame trigger pulses at the output of the divider set by the encoder frame divider. This measurement helps determine the appropriate value of the encoder timeout.

The measured time interval is reported in cycles of the camera’s timestamp clock, not in microseconds. The frequency of this clock is determined by the GEV Timestamp Tick Frequency, which varies by camera model. For example:

• 10GigE cameras use a frequency of 150,000,000 Hz (150 MHz)
• 25GigE and 100GigE cameras use a frequency of 400,000,000 Hz (400 MHz)

To convert the measurement to seconds, divide the cycle count by the GEV Timestamp Tick Frequency value. For instance, a result of 6,000,000 cycles corresponds to 40 ms on a 150 MHz clock.

See also:

• encoder mode
• encoder line divider
• encoder line divider measurement

GP_ENC_FRAME_DIV_MEAS node

• Access mode: Read only
• Node type: Uint32

You can use the eSDK API functions to get the node’s current value.

For information about related features, see General Purpose Input/Output Control Features.