version 2.0 rev 18 Feb 2021
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2.6.2.1 Timing Parameters and Ext Triggering for Zyla 5.5
The timing tables accompanying each of the triggering diagrams that follow indicate the exposure and cycle
times achievable in each triggering mode for the Zyla 5.5. These are based on Frame and Row Periods as
shown below.
Table 8: Timing Parameters based on Sensor Clock Speed (Zyla 5.5)
Parameter
Sensor Read out Rate
200 MHz 560 MHz
1 Row (2624 clock cycles) 25.41 µs 9.24 µs
1 Full Frame ( 2160 rows) 27.44 ms 9.98 ms
The time taken to read out a full row is equal to 2624 clock cycles. The sensor is split into 2 halves with each
having an independent data output from the sensor. This means the Frame Period is 1080 rows x 2624 clock
cycles. For sub-images the frame readout time is related to the number of rows being displayed.
In External and External Start Triggering Modes, the minimum trigger pulse width detected by the Zyla 5.5
camera is shown below in Table 9:
Table 9: Minimum EXT Trigger Width (Zyla 5.5)
Parameter
Sensor Read out Rate
200 MHz 560 MHz
EXT Trig Pulse Width ( 2 clock cycles) 19.37 ns 7.04 ns
2.6.2.2 Timing Parameters and Ext Triggering for Zyla 4.2
The timing tables accompanying each of the triggering diagrams that follow indicate the exposure and cycle
times achievable in each triggering mode for the Zyla 4.2. These are based on Frame and Row Periods as
shown below.
Table 10: Timing Parameters based on Sensor Clock Speed (Zyla 4.2)
Parameter
Sensor Read out Rate
216 MHz 540 MHz
1 Row (2592 clock cycles) 24.00 µs 9.60 µs
1 Full Frame ( 2048 rows) 24.54 ms 9.83 ms
The time taken to read out a full row is equal to 2592 clock cycles. The sensor is split into 2 halves with each
having an independent data output from the sensor. This means the Frame Period is 1024 rows x 2592 clock
cycles. For sub-images the frame readout time is related to the number of rows being displayed.
In External and External Start Triggering Modes, the minimum trigger pulse width detected by the Zyla 4.2
camera is shown below in Table 11:
Table 11: Minimum EXT Trigger Width (Zyla 4.2)
Parameter
Sensor Read out Rate
216 MHz 540 MHz
EXT Trig Pulse Width ( 2 clock cycles) 20 ns 7.4 ns
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