Products > Test Equipment
Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
ollopa:
Various sources: Technologies for Very High Bandwidth Real-time
Oscilloscopes, Advances in Oscilloscope Technology, and older product service manuals.
One of the service manuals adds the following:
MTB: Monolithic TimeBase
MCG: Monolithic Clock Generator
HTR: Hybrid Trigger compaRator
HSY: Hybrid Switchyard
HAM: Hybrid Acquisition Memory
No reference to AMB found yet. I wonder if it could be for AMBient temperature, though.
nctnico:
--- Quote from: ZhuraYuk on November 07, 2019, 11:22:49 pm ---Here is my temperatures after 30 min run in 2ch 20GS mode at 7300A. This is with sound absorbing foam vent mod.
--- End quote ---
Here is a screenshot from mine (with the Gentle Typhoon fans):
The room temperature is around 22 degC. I don't think your foam addition is improving the airflow from the fans because the temperatures in my scope are about 5 to 8 degrees lower. I'd guess that the rough and irregular surface of the foam causes a lot of turbulence and limits the airflow. It is also clear that the airflow over the acquisition board is far from consistent given the large differences between the channels.
analogRF:
it's a bit silly that the software reports temperatures with 2 decimal digits :-DD
analogRF:
i dont have a screen shot but my MAD temperatures with the original Panaflo fans after around 1-1.5 hours of normal use (mostly spectrum analysis) are around 71-76 degrees C. Other temps hover around 60-68...so the fans are lousy but noisy ... they sound like a jet engine but not very effective...
EDIT: and my Prescott 3.2GHz HyperThreading CPU is holding up with the original stock fan! temp is around 60-62... the software does not heavily load the CPU
ollopa:
Whether or not the software loads up the CPU depends on what features are enabled. Basic scope functionality is low load but filtering, protocol decode, and other math transforms and software triggers wind up having to use the CPU to process the capture buffer. Your CPU load then becomes a function of your sample rate and memory depth.
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