Pre and post trigger using analogue signal level to start trigger
When an open accelerometer channel reaches certain level (say 4 mV) I need a trigger to start data acquisiton, saving the previous 1.5 seconds of data across all eight channels and then stop recording and store the data six seconds after the trigger was started.
Can DASYLab do this?
Your help's appreciated,
Bob
vibration testing
The trigger modules are all control modules; they all output a TTL type signal, 0 or 5, that can be used by other modules.
In this case, the simple trigger configuration should look like this.
A/D ----------- Trigger ---------------- X Relay ---------------- Write Module
\---------------------------------0
The trigger controls the open and close of the Relay, which release the Analog data that you branched to the second input of the Relay.
--cj
- cj
Measurement Computing (MCC) has free technical support. Visit www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab.
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I am planning a measurement system and search some ideas for programming how to realize it.
I have an older NI PCI-6024E and want to measure 8 voltage signals with 2 kHz. When task is started it should run some hours without task stop.
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Dudes...am I crazy?
I have 2 tracks. One plays a vocal and one plays a guitar. Both are sent to the same Aux or Bus track with a reverb on it, via the sends on their respective channels.
If I solo the guitar track, I still get reverb tails from the vocal track on the bus channel as well as the guitar!
If I switch the vocal track send to "post", then the reverb tails go away for the vocal. By the way, I'm soloing from the mixer channels, not the arrange window.
Now I understand that if it were the vocal track that I had soloed then switching between Pre and Post on the send would dictate if I hear the reverb tails or not for the vocal track.
But that's not the track I have soloed! I have the guitar track soloed. So why would I hear reverb tails on a track that's not soloed. And why would the reverb tail go away on the vocal track if I change the send to Post, when that's not the channel I have soloed.
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By the way, I understand that if you solo a track, it might be cool to also hear it's effects channel without having to solo the bus track its feeding.
But why would I hear another tracks effects? This only happens when two different tracks have the same bus inserted in their sends. Just because I'm using the same send for two different tracks, doesn't mean I want to hear both sends even if only one track is soloed. That's the part that makes no sense for me. Solo should only address and isolate the track that's soloed and whatever else is related to it (ie...busses/sends/plugs etc..)
I dunno, I guess when you solo a track it keeps open the bus/send it's using unless your exercise the pre/post send option. And if there's someting else using that bus send as well, it must need to stay open for it too.
By the way, for me sometimes Logic will continue to play a certain audio track, usually a single track of it's choosing, even if another track is the only one soloed. There are no busses, no plugs, no sends on it, just a straight track and I still have to mute it after soloing some other track. Now that's not right...pre/post etc...is not in the equasion here, can someone explain that?
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look at http://help.sap.com/saphelp_erp2004/helpdata/en/13/18601823c6ff4daa0bb05b4cded814/content.htm
In the Time of Calculation field (inside BEx formula properties), you can choose whether the formula is calculated After Aggregation or Before Aggregation.
see more info in http://help.sap.com/saphelp_erp2004/helpdata/en/6f/56853c08c7aa11e10000000a11405a/content.htm
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http://help.sap.com/saphelp_erp2004/helpdata/en/bb/9e8b6b4d6f0d45b1efb5dfbc3b44a5/content.htm
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Although I understand the principle and consequences of changing my sends from post to pre fader, I can't for the life of me think of a situation where this would be desirable. Can someone enlighten me?
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