Noise from DAQ signals sent through a 2532 switch

Hello,
I may have a hopeless case here, but it's worth a shot....
I am trying to send DAQ analog voltage time traces through a 2532b switch, and then to my DUT. When I measure the DUT without the switch, my noise level is very low. When I route signals through the switch to the DUT, the noise is increased (as expected) but to a degree that makes this system totally useless for my application. Is the 2532 not designed to route analog signals? Can I hope to send analog signals through my switch with say a doubling in noise instead of a 15x increase in noise?
I have posted a schematic of how my system is configured. Note that wherever possible, I am using BNCs. I even threaded the 2532 ribbon cables through a 1/2 in. tinned copper braid, so the system is about as well shielded as is possible with this hardware. I've also posted signal sent to the DUT (in this case a dummy 1Mohm resistor) using a 1Mhz sampling rate.
Thanks, everyone!
Attachments:
setup.png ‏23 KB
no switch.PNG ‏72 KB
with switch (2).PNG ‏75 KB

Hi Frank,
Sorry I should have included more information. The DAQ is outputting a voltage signal, for example a 1Hz 1V sin wave. This signal serves as the external voltage source for a potentiostat, such that the potentiostat sources the signal it receives from the DAQ. The potentistat has hi and low leads (working electrode and counter electrode) which are routed through the switch before going to the DUT. The potentiostat then measures the actual applied voltage and the measured current and outputs them as voltage signals which are fed directly into the DAQ.
The breakout boxes are all shielded and so are the cables. The DUT is in a faraday cage.
As far as noise sources, the building ground is not terrific but it is pretty good. 60hz noise is present, but the fft spectrum of the noisy signal also contains prominent signals at 80kHz and higher. The potentiostat is designed for high bandwidth, low current applicaitons and so has very favorable noise. The PXIe is the only computer on in the room, and all electronics are plugged into a isolated power supply (it think it is generically called a UPS). I've turned off all other equipment in the room including the lights.
Anyways, the noise only shows up when I route the signal from the potentiostat through the switch. When I send the signal from the potentiostat directly to the DUT, the noise is great (see attachments in previous posts). I would blame the extra noise on a ground loop except that as I have set it up, routing the signal through the switch does not introduce any extra paths to ground.
Thanks for taking a look at this!
-Gim

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your setup of the message gateway seems to be ok.
Did you check the corresponding versions of the client libraries (*.jar) ? These are the libraries on
db server side (e.g. aqapi.jar, based on your CLASSPATH entries in file "mgw.ora") and for the IBM MQ jars.
Kind regards,
WoG

Noise from DAQ signals sent through a 2532 switch

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