Model 4225-RPM and Model 4225-RPM-LR Remote Pulse Module Instructions
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PA-1086 Rev. A October 2020
With an RPM installed, never make connections directly to any of the SMA connectors (CH1
and CH2) on the PMU module. This may result in damage to the PMU or DUT, or may produce
corrupt data.
To prevent possible settling and impedance matching problems that may affect proper ranging and
LLEC operation, do not mix 4225-RPMs and 4225-RPM-LRs in one system. Use either all
4225-RPMS or all 4425-RPM-LRs.
Connections from the 4225-PMU to an RPM
The following figure shows the connection from the 4225-PMU to either RPM.
The RPM is matched to a PMU card and channel. Make sure to connect the RPM only to that PMU
card and channel. Labels on top of the RPM indicate the specific connection channel and PMU. For
example, "PMU1-2" indicates PMU1, channel 2.
Figure 4: 4225-PMU connection to an RPM