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Unibrain Fire-i 52x/620/720/820 Operation Manual Page 29

3.9. Gain

Gain refers to the amount of the CCD output signal amplification where gain and shutter have similar effect to the

image. Manual and Automatic gain mode are supported and manual adjustment is possible for the following range.

For Gain control inquiry and status register, follow the same definition as “BRIGHTNESS”.

Camera Type Step Range Range in dB Increment Length

Monochrome Camera 0 ~ 723 0 ~ 25 approx. 0.0345 dB/step

Color Camera 0 ~ 723 0 ~ 25 approx. 0.0319 dB/step

3.10. Trigger & Strobe

The cameras support external trigger by receiving input through the external trigger port The falling edge and rising

edge can be detected as trigger according to the modes it supports as per the following table. Strobe timing is user

controllable while signal output is TTL. A software trigger can also be used which issues trigger signal via software

command.

3.10.1. Supported Trigger

Edge Rising Edge or Falling Edge

Mode 0, 1, 2, 3, 4, 5, 14

Trigger

Source External or Software Trigger

Inquiry Register

Address Name Field Bit Description

Presence_Inq

[0]

Presence of this feature

Abs_Control_Inq

[1]

Capability of control with absolute value

- [2..3] Reserved

ReadOut_Inq [4] Capability of reading the value of this feature

On/Off_Inq [5] Capability of switching this feature On and OFF

Polarity_Inq [6] Capability of changing polarity of trigger input

[7..15] Reserved

Trigger_Mode0_Inq [16] Presence of Trigger Mode0

Trigger_Mode1_Inq [17] Presence of Trigger Mode1

Trigger_Mode2_Inq [18] Presence of Trigger Mode2

Trigger_Mode3_Inq [19] Presence of Trigger Mode3

530h TRIGGER_I

[20..31] Reserved

Status Control Register

Address Name Field Bit Description

Presence_Inq

Presence of this feature

0:N/A 1:Available

Abs_Control

[1]

Absolute value control

0: Control with value in the Value field

1: Control with value in the Absolute value CSR

If this bit = 1, value in the Value field is ignored.

830h TRIGGER_

MODE

- [2..5] Reserved

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 63 64

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