Acquisition Modes
Dual
Combination of Multiple sweeps and Continuous; recorder type streaming to hard disk with
simultaneously triggered sweeps in on
-
board memory. Aggregate sample rate limitations
depend on Ethernet speed, PC used and data storage media used.
In Dual mode the RT
-
FDB calculators sample based results are only calculated for the
sweep sections of the recorded data. Due to the asynchronous nature of cycle based results,
all cycle based results are continuously stored and used in both the sweep as well as the
continuous sections of the recording.
Recording Mode Details
Single Sweep
Multiple Sweeps
Slow
-
Fast Sweep
Continuous
Dual Rate
Enabled channels
Enabled channels
Enabled channels
1 Ch
2 Ch
4 Ch
1 Ch
2 Ch
4 Ch
1 Ch
2 Ch
4 Ch
Max. sweep memory
900 MS
450 MS
225 MS
not used
720 MS
360 MS
180 MS
Max. sweep sample rate
100 MS/s
not used
100 MS/s
Max. continuous FIFO
not used
900 MS
450 MS
225 MS
180 MS
90 MS
45 MS
Max. continuous sample
rate
not used
20 MS/s
Sweep sample rate / 2
Maximum 20 MS/s
Max. aggregate
continuous streaming rate
not used
20 MS/s
40 MS/s
80 MS/s
(1)
20 MS/s
40 MS/s
80 MS/s
(1)
40 MB/s
80 MB/s
160 MB/s
(1)
40 MB/s
80 MB/s
160 MB/s
(1)
(1)
Only mainframes with "fast data streaming" support can stream at this data rate continuously.
Single Sweep
Pre
-
trigger segment
0% to 100% of selected sweep length
If trigger occurs before the pre
-
trigger segment is recorded, the pre
-
trigger segment is
truncated to recorded data only.
Delayed trigger
Maximum 1000 seconds after a trigger occurred. The sweep is recorded immediately after
a delayed trigger time with 100% post
-
trigger after this time point.
Sweep stretch
User selectable On/Off
When enabled, any new trigger event occurring in the post
-
trigger segment of the sweep
restarts the post
-
trigger length. If, upon the detection of a new trigger, the extended post
-
trigger does not fit within the sweep memory, sweep stretch does not happen. The maximum
sweep stretch rate is 1 sweep stretch per 2.5 ms.
Multiple Sweeps
Pre
-
trigger segment
0% to 100% of selected sweep length
If trigger occurs before the pre
-
trigger segment is recorded, the pre
-
trigger segment is
truncated to recorded data only.
Delayed trigger
Maximum 1000 seconds after a trigger occurred. The sweep is recorded immediately after
a delayed trigger time with 100% post
-
trigger after this time point.
Maximum number of sweeps
200 000 per recording
Maximum sweep rate
400 sweeps per second
Sweep re
-
arm time
Zero re
-
arm time, sweep rate limited to 1 sweep per 2.5 ms
Sweep stretch
User selectable On/Off
When enabled, any new trigger event occurring in the post
-
trigger segment of the sweep
restarts the post
-
trigger length. If, upon the detection of a new trigger, the extended post
-
trigger does not fit within the sweep memory, sweep stretch does not happen. The maximum
sweep stretch rate is 1 sweep stretch per 2.5 ms.
Sweep storage
Sweep storage is started immediately after the trigger for this sweep has been detected.
Sweep memory becomes available for reuse as soon as storage of the entire sweep for all
enabled channels of this card has been completed. Sweeps are stored one by one, starting
with the first recorded sweep.
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