Function Description
R&S
®
TS-PSAM
18
User Manual 1142.9878.12 ─ 12
The channels of the single components MU and DSC cannot be cross-connected if the
resistance measurement function (
rspsam_ConfigureMeasurement
) is configured.
In this case, use the DMM channels. During resistance measurement, the MU and
DCS components will be connected through internal configuration relays, depending
on the chosen range (see figures from
to
). For example, during a
4-wire resistance measurement in modus C, the DMM_SHI wire corresponds to the
channel MU_HI of the measurement unit. During a 4-wire resistance measurement in
modus V, the DMM_LO wire corresponds to the MU_HI channel of the measurement
unit.
If you need to use the MU and DSC components independently from each other, you
need to operate the measurement unit in the voltage or current measurement function
(
rspsam_ConfigureMeasurement
). With these functions, the configuration relays
are set so that the channels of the single components can be cross-connected.
The switch channels can be controlled using the GTSL routing library too. The route
functions constitute the interface for this library. The bus coupling relays will be auto-
matically controlled by the routing library.
Low level switching function
The function
rspsam_cnx_Matrix
controls the relays of a lower software level. Not
to be used together with the route functions
(
rspsam_Connect und rspsam_Disconnect
).
Bus coupling relays
Through the
rspsam_ConfigureCoupling
function you can connect the wires of the
local analog buses to the system wide analog buses of the Compact TSVP. You can
therefore multiplex the components of the module on many test points, using the matrix
switch modules (e.g., TS-PMB) .
The "Signal Routing" GTSL library controls the bus coupling relays automatically.
The
rspsam_DisconnectAll
function does not open the bus coupling relays.
Ground relays
The MU_LO and DCS_LO channels can be connected to the system mass, if needed.
The components will then be earth tied. The
rspsam_ConfigureGround
function
enables the corresponding relays, depending on the chosen measurement function.
During a resistance measurement DSC_LO will be connected to GND. During all other
measurement, the MU_LO function will be cross-connected to GND. If you need to use
the MU and DSC components independently, you can configure the earth tied opera-
tion through the
rspsam_cnx_Gnd
function.
Resistance measurements in which GND is ment to be used as DMM_LO are only
possible for a 1
Ohm and 10
Ohm range. In these ranges Mode C is used and
DMM_LO can be replaced by GND. See
on page 3 and
Chapter 5.1.4, "Resistance measurement"
Function description of the R&S TS-PSAM Module
