Mikrotron MC132x Especificaciones descargar pdf (Pagina 19)

Configuration MC132x Users Manual Rev. 0.23

6.3.3 Load factory profile

The eight factory profiles, located in non volatile memory, can be read but not changed by the user.

With this command factory profile no. <n> is loaded into Camera Profile. Additionally all registers will

be programmed with the new values.

Command: :f<n> <n> = 0 ... 7

Response: ACK if enabled by separate command :A<n>

6.4 Image quality

There are eight analog parameters to adjust the first stage of the sensor and influence image quality.

Five of them are calibrated for getting excellent image quality and should not be changed. Three pa-

rameters are also preset for good image quality. Although it’s not necessary to change them, it can be

useful to optimize them depending on the used camera mode and speed. The three parameters are FPN,

Gain, and Black up.

6.4.1 FPN

The Fixed Pattern Noise setting reduces the fixed pattern noise that is typical to CMOS sensors. This

level might be changed if the sensor clock frequency is changed. For adjustment set the lens out of fo-

cus and to a medium grey level. Lower FPN until a heavy pattern appears. Then raise by a few points.

Command: :a1<x

> : Range 00 .. ff (hex), typ. 55h ... 80h,

ASCII char

Response: ACK if enabled by separate command :A<n>

Example: :a164 set register a1 to 64 (hex)

6.4.2 Gain

This is the threshold for the A/D converters. To increase the gain the value of a2 must be lowered. Val-

ues below 30h will lead to oversensitive images and are not recommended to set.

Command: :a2<x

> : Range 00 ... ff (hex), typ. 30 ... 80 (hex),

ASCII char

Response: ACK if enabled by separate command :A<n>

Example: :a264 set register a2 to 64 (hex)

6.4.3 Black Level

If no Black Level is adjusted (= 00 hex), each pixel will have an offset, which reduces the contrast. For

excellent image quality it’s recommended to adjust Black Level to subtract this offset from each pixel

value.

For adjustment of the Black Level it’s recommended to darken the sensor (closed lens) and increase the

Black Level value till all pixel values are touching 0 level. The Black Level can vary slighty with

changing the sensor clock and should be optimized for each selected speed.

Command: :a5<x

> <x

>: Range, typ. 00h ...ff (hex), typ. 30… 80 hex

ASCII char

Response: ACK if enabled by separate command :A<n>

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Mikrotron MC132x Especificaciones Pagina 19