Hamamatsu Photonics C8484-16C Instruction Manual page 23

9-4-1-3 Exposure time setting: Frame blanking*
Exposure and readout repeat along with the operation of the electronic shutter according to the
sequence set internally. The exposure time (Frame blanking*) is set with the FBL n command.
This setting is made in units of one vertical scan cycle.
*
Frame blanking: Photosensors are exposed for a specified number of frames; however the accumulated charge to the VCCD
from the photosensors are not read out every frame.
(1) Normal readout
Exposure and normal readout repeat according to the sequence set internally.
Command
Scan mode
Exposure time
1V (vertical)
Setting count
Repeat cycle
Exposure time can be calculated using the formula below.
CCD exposure
Readout signal
from CCD chip
Digital data
output
(2) 2×2 binning readout
Exposure and 22 binning readout repeat according to the sequence set internally.
Command
Scan mode
Exposure time
Binning
1V (vertical)
Setting count
Repeat cycle
Exposure time can be calculated using the formula below.
CCD exposure
Readout signal
from CCD chip
Digital data
output
: AMD N (Free running mode)
: SMD N (Normal)
: NMD F, FBL n (Frame blanking)
: 83.8 ms
: 1V to 12V (83.8 ms to 1.00 s)
: 11.9 Hz/n
Exposure time = n × 83.8 ms
Exposure time = FBL n
: AMD N (Free running mode)
: SMD S (Binning)
: NMD F, FBL n (Frame blanking)
: SPX 2 (2×2 binning)
: 46.9 ms
: 1V to 22V (46.9 ms to 1.03 s)
: 21.3 Hz/n
Exposure time = n × 46.9 ms
Exposure time = FBL n
Readout period
C8484-16C Instruction manual Ver.1.5
(n=1 to 12)
Readout period
(n=1 to 22)
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