LiveCommander
Member
Hi,
I have a question about timing performance of LED slim PAR's. Last night I unpacked and tried my EuroLite KLS-1001 slim LED par set (4 slim pars on a bar with 12 3W TCL Led's each).
To my amazement I quickly noticed that the four separate pars do not respond at the exact same time when you control them through DMX. Even if you use the single dimmer channel which is shared between all four pars you can easily notice how the 4th light comes on a little bit later than the 1st.
Since it's only 1 DMX channel that is being changed it can't have anything to do with any latency inherent in the DMX protocol (which is pretty fast anyway) and the effect even occurred if I used the built-in strobe channel: the 4 PAR's did not light at the same time (but they almost did so I don't think it was intentional to have them strobe at different points in time).
Being an EE I suspect that the poor little microcontroller that is in this set is simply being taxed to heavily and I assume it must both PWM the LED's for dimming and take care of the incoming DMX signal.
There also seemed to be some general latency between DMX controller these lights which seemed to exceed what I would expect (DMX should be able to update 40 times per second and since I only use addressed in the range 0-64 I should be getting an even higher refresh rate).
These are my questions:
The SKL-1001 cost EUR 520 / US$ 740 excluding VAT so that's EUR 620 / US$ 185 per light (including suitcase and T-bar) and I don't really want to spend more than that.
I have a question about timing performance of LED slim PAR's. Last night I unpacked and tried my EuroLite KLS-1001 slim LED par set (4 slim pars on a bar with 12 3W TCL Led's each).
To my amazement I quickly noticed that the four separate pars do not respond at the exact same time when you control them through DMX. Even if you use the single dimmer channel which is shared between all four pars you can easily notice how the 4th light comes on a little bit later than the 1st.
Since it's only 1 DMX channel that is being changed it can't have anything to do with any latency inherent in the DMX protocol (which is pretty fast anyway) and the effect even occurred if I used the built-in strobe channel: the 4 PAR's did not light at the same time (but they almost did so I don't think it was intentional to have them strobe at different points in time).
Being an EE I suspect that the poor little microcontroller that is in this set is simply being taxed to heavily and I assume it must both PWM the LED's for dimming and take care of the incoming DMX signal.
There also seemed to be some general latency between DMX controller these lights which seemed to exceed what I would expect (DMX should be able to update 40 times per second and since I only use addressed in the range 0-64 I should be getting an even higher refresh rate).
These are my questions:
- Has anyone ever noticed a similar phenomenon with a product like this (4 PARs with one integrated DMX controller that control all four)
- If you use separate LED PARs each with their own individual DMX input and set them at subsequent DMX addressed, will you be able to notice them switching on not synchronously? I also have some ancient Martin RoboColors and if I control their individual shutters they seem to be in perfect sync.
- Any recommendations for a similar 4x slim LED PAR set with known accurate DMX response and timing? MUST have TCL or QCL led modules.
The SKL-1001 cost EUR 520 / US$ 740 excluding VAT so that's EUR 620 / US$ 185 per light (including suitcase and T-bar) and I don't really want to spend more than that.
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