Ocean Insight OCEAN SR2 - Page 28

MNL-1029 Rev A
20
Since the integration is not predefined (user defined), the minimum integration time is no longer 1 µs. The minimum integration
effectively becomes the maximum busy time 1, t
BUSY1
, which is 218 µs. The user can still define an acquisition delay; however, the
minimum integration remains fixed. External Level Trigger timing parameters are described below.
Symbol
Description
Time
Notes
min
typ
max
T0
External Level Trigger
Start of Acquisition Cycle
t
TLPUL
External Level Trigger Pulse Width
218.03 µs
--
1.19 hours
30 ns + 218 µs
(Minimum, t
ACQDLY
= 0)
t
ETRGDLY
External Edge Trigger Delay
--
--
30 ns
t
ACQDLY
Acquisition Delay
0 µs
--
1.19 hours
User specified, 1 µs resolution
t
BUSY1
Busy
--
--
1 µs
Constant at 1 µs
t
INTEG
Integration Period
218 µs
--
1.19 hours
Integration period is equal to t
LPUL
–
t
ACQDLY
– 30 ns.
t
BUSY2
Busy
--
--
--
Constant at 218 µs
t
SSDLY
Single Strobe Delay
0 µs
--
1.19 hours
User specified, 1 µs resolution
t
SSH
Single Strobe High Time
0 µs
--
1.19 hours
User specified, 1 µs resolution
t
CSPER
Continuous Strobe Period
0 µs
--
1.19 hours
User specified, 1 µs resolution
t
CSOFF
Continuous Strobe Off Time
0 µs
--
t
CSPER
The following timing diagram represents the acquisition process for an External Level trigger event.