FLIR X6570sc series, User Manual

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Radiometric measurement 8
Note
• When using an external frame synchronization and preset sequencing, or superfram-
ing, the external frame synchronization should be set to comply with the ITR frame
rate limits. If the external synchronization rate is too fast, the camera will ignore syn-
chronizations that occur before the camera is ready.
• If the frame rate is too low, the image quality may deteriorate. Contact your FLIR rep-
resentative if you have questions about low frame rates for your specific camera
model.
• Synchronization is different from triggering. The latter is described in section 8.8 Trig-
ger In , page 42.
• The IWR mode is not available in all camera models.
Figure 8.4 Frame synchronization—ITR mode.
Figure 8.5 Frame synchronization—IWR mode.
8.7.1 Sync In
8.7.1.1 General
The Sync In signal is supplied to the camera by connector 4 in Figure 5.3 Camera back
panel description. , page 11. The minimum pulse width is 300 ns.
The Sync In setup is described in section 6.4.7 Synchronizing the camera to an external
signal , page 23.
8.7.1.2 Characteristics
Name Value
Amplitude Rising-edge TTL, 0/+5 V
High-state minimum voltage >3.5 V
Low-state maximum voltage <0.5 V
Polarity User selectable
Maximum frequency 1 Maximum frame rate of the camera for a given de-
tector configuration
2
Minimum pulse width 300 ns
Impedance User selectable. 50 Ω/10 MΩ
Protection
Voltage peaks (500 V/<1 ns)
Overvoltage (15 V)
Reversed polarity
Connector type Coaxial BNC jack
1. Some cameras also have a minimum frequency (unspecified). Contact your FLIR representative for more
information.
2. Example: If the detector is working at 100 in full frame, then the maximum frequency will be 100.
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