Products > Test Equipment
E36300 Series Programmable DC Power Supplies (E36311A, E36312A, E36313A)
<< < (3/54) > >>
colorado.rob:

--- Quote from: alm on June 15, 2017, 05:21:52 pm ---
--- Quote from: colorado.rob on June 15, 2017, 05:04:00 pm ---The 12A and 13A seem to be the same size and features as the TTi MX100TP I just purchased, but with a lower load capability and at a higher price.  What am I missing?  The 11A is the same price, but far less capable.

--- End quote ---
Better constant current mode (accuracy, noise)? Current readback resolution down to 1 µA? More software support (BenchVue, as opposed to only drivers to interface with your own software)? Stand-alone logging of data?

--- End quote ---
What good does having 1µA readback resolution do you when the level of accuracy quoted is 2-3 orders of magnitude greater?  Specs show 0.04% +3 mA and 0.25% +80 uA readback accuracy.

Given that stand-alone logging and BenchVue software are not features I want or need, the TTi is better value to me.  And, not that it matters to me, the MX100TP comes with GPIB.
nctnico:

--- Quote from: colorado.rob on June 15, 2017, 06:35:47 pm ---
--- Quote from: alm on June 15, 2017, 05:21:52 pm ---
--- Quote from: colorado.rob on June 15, 2017, 05:04:00 pm ---The 12A and 13A seem to be the same size and features as the TTi MX100TP I just purchased, but with a lower load capability and at a higher price.  What am I missing?  The 11A is the same price, but far less capable.

--- End quote ---
Better constant current mode (accuracy, noise)? Current readback resolution down to 1 µA? More software support (BenchVue, as opposed to only drivers to interface with your own software)? Stand-alone logging of data?

--- End quote ---
What good does having 1µA readback resolution do you when the level of accuracy quoted is 2-3 orders of magnitude greater?  Specs show 0.04% +3 mA and 0.25% +80 uA readback accuracy.

Given that stand-alone logging and BenchVue software are not features I want or need, the TTi is better value to me.  And, not that it matters to me, the MX100TP comes with GPIB.

--- End quote ---
The TTi PSU seems like a switcher to me when I look at the weight (approx 5kg). The RMS noise on the TTi PSU is about 10 times larger than this new Keysight series which seems to be linear (approx 8kg). I'm not saying a switching PSU is bad (I have a bunch of them) but sometimes you need a low noise PSU. Also the offset is over the entire temperature range so it may be lower at room temperature. Resolution is nice so at least you can see small changes. I expect the logging feature on these new Keysight PSUs is extremely helpful for low power devices to determine the power profile.
colorado.rob:

--- Quote from: nctnico on June 15, 2017, 07:49:05 pm ---Resolution is nice so at least you can see small changes. I expect the logging feature on these new Keysight PSUs is extremely helpful for low power devices to determine the power profile.

--- End quote ---
Resolution is meaningless without precision (accuracy).  I suppose one could use the last two digits to feed entropy into a random number generator, so it's not entirely useless. ;)


nctnico:

--- Quote from: colorado.rob on June 15, 2017, 10:14:54 pm ---
--- Quote from: nctnico on June 15, 2017, 07:49:05 pm ---Resolution is nice so at least you can see small changes. I expect the logging feature on these new Keysight PSUs is extremely helpful for low power devices to determine the power profile.

--- End quote ---
Resolution is meaningless without precision (accuracy).  I suppose one could use the last two digits to feed entropy into a random number generator, so it's not entirely useless. ;)

--- End quote ---
Everything is relative and so are measurements. If the current jumps up or down 10uA then that will likely be a change in the current drawn by the load and not the measurement offset. Either way it is not trivial to measure these kind of low currents going into a ciruit without dropping a significant burden voltage or deteriorating the power supply's out impedance so I'm happy with what I can get.
colorado.rob:

--- Quote from: nctnico on June 15, 2017, 10:58:08 pm ---Either way it is not trivial to measure these kind of low currents going into a ciruit without dropping a significant burden voltage or deteriorating the power supply's out impedance so I'm happy with what I can get.

--- End quote ---
As long as it meets your needs and you think you're getting value for you money, that's all that matters.  I'd be interested to see a good review and teardown video by someone who knows what they are doing and isn't just a button pusher.

What I really want I cannot have.  I really like the TTi, but I want it in a 2U <300mm depth with the same features on the front panel.  Physically, that cannot happen without some compromises.  The HMC8043 is the right size (and looks nice), but doesn't have binding posts or sense ports in the front.  And the user interface looks like it might be a little challenging with so few buttons compared with the TTi.  And the vent holes on top...  :palm:
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod