Allied Vision Pike F-032B/C, Technical Manual

Page: 324 / 376

Pike Technical Manual V5.2.0
324
Configuration of the camera
Time base
Corresponding to IIDC, exposure time is set via a 12-bit value in the correspond-
ing register (SHUTTER_INQ [51Ch] and SHUTTER [81Ch]).
This means that you can enter a value in the range of 1 to 4095.
Pike cameras use a time base which is multiplied by the shutter register value.
This multiplier is configured as the time base via the TIMEBASE register.
The time base IDs 0-9 are in bit [28] to [31]. See Table 159: Time base ID on page
324.
Default time base is 20 μs: This means that the integration time can be changed
in 20 μs increments with the shutter control.
The ExpOffset field specifies the camera specific exposure time offset in micro-
seconds (μs). This time (which should be equivalent to Table 72: Camera-specific
exposure time offset on page 209) has to be added to the exposure time (set by
any shutter register) to compute the real exposure time.
The ExpOffset field might be zero for some cameras: this has to be assumed as
an unknown exposure time offset (according to former software versions).
Register Name Field Bit Description
0xF1000208 TIMEBASE Presence_Inq [0] Indicates presence of this fea-
ture (read only)
--- [1..7] Reserved
ExpOffset [8..19] Exposure offset in μs
--- [20..27] Reserved
Timebase_ID [28..31] See Table 159: Time base ID on
page 324.
Table 158: Advanced register: Time base
Note

Time base can only be changed when the camera is in idle state
and becomes active only after setting the shutter value.
ID Time base in μs
0 1
1 2
2 5
3 10
Table 159: Time base ID