Support different AD input methods for NI hardware

[t-b]

From: https://aiephys.slack.com/archives/C06P3MYEV6H/p1754836566680459?thread_ts=1753474553.043859&cid=C06P3MYEV6H

Up to now we always required NI devices which support RSE. A recent user used Diff

diff --git a/Packages/MIES/MIES_DAC-Hardware.ipf b/Packages/MIES/MIES_DAC-Hardware.ipf
index 3f9f5329ad..3af5029e73 100644
--- a/Packages/MIES/MIES_DAC-Hardware.ipf
+++ b/Packages/MIES/MIES_DAC-Hardware.ipf
@@ -2371,7 +2371,7 @@ Function HW_NI_PrepareAcq(variable deviceID, variable mode, [WAVE/Z data, FUNCRE
             ASSERT(!IsFreeWave(NIDataWave[i]), "Can not work with free waves")
             switch(config[i][%ChannelType])
                 case XOP_CHANNEL_TYPE_ADC:
-                    scanStr += num2str(config[i][%ChannelNumber]) + "/RSE,"
+                    scanStr += num2str(config[i][%ChannelNumber]) + "/Diff,"
                     scanStr += num2str(NI_ADC_MIN) + "," + num2str(NI_ADC_MAX) + ","
                     scanStr += num2str(gain[i]) + ",0"
                     scanStr += ";"

and got it working as well.

So we should support all available methods.

• Add a popupmenus for DAC/pressure and user pressure device, default to RSE
• Check in DAP_CheckSettings that the selected method is also available
• Pass that down to HW_NI_PrepareAcq
• Document the choice in the labnotebok for DAC
• Document HW_NI_DIFFERENTIAL_SETUP

[t-b]

Minor complication, we do require differential mode for pressure and user pressure ADC channels.