MNL-1029 Rev A
15
The integration delay, t
INTDLY,
starts after t
PROC
and ends before the start of integration time,
t
INTEG
. The integration delay is the sum of
the user defined acquisition delay, t
ACQDLY
(entered in OceanView software) and t
BUSY1
.
The integration period, t
INTEG
,
is user defined but has a minimum value of 1 µs.
Following the integration period, the detector is busy to finish the acquisition cycle and that time is t
BUSY2
. After this time, the detector
is ready for another trigger.
The equation for the integration delay can be written as
t
INTDLY
=
t
ACQDLY
+ t
BUSY1
where the spectrometer busy time 1 (t
BUSY1
)
is:
t
BUSY1
=
(219 µs
–
t
INTEG
)
when t
INTEG
< t
BUSY2
and
t
BUSY1
= 1 µs
when t
INTEG
>= t
BUSY2,
where t
BUSY2
= 218 µS.
It should be noted that the maximum value of t
BUSY1
is 218 µs, which is important for the Level Trigger mode.
The single strobe is a single active-high pulse defined by an initial delay (t
SSDLY
) from the start of the acquisition delay (t
ACQDLY
) and a
pulse width (t
SSH
). The values for the single strobe delay and pulse high width are set by the user in OceanView or OceanDirect
software.
The continuous strobe signal is a series of pulses with a user specified period that starts with the beginning of the integration time,
t
INTEG
. The pulses have a 50% duty cycle and only full periods are exercised during an integration period. If a subsequent continuous
strobe period cannot be completed before the end of the integration cycle, the continuous strobe signal is turned off and set to 0.
Software Trigger timing parameters for the Single Spectra Capture mode are described below. The timing resolution for the
spectrometer is 1 µs. This means values entered in Ocean
View for “User Specified” values are integer multiples of
1 µs.
Summary of Contents for OCEAN SR2
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