VXI VT1538A user manual Identifying the Plug-on IMPORTANT

both full and half step modes.(requires 2 or 4 channels)

The logical sense of input and output channels can be configured as inverted or normal.

Input-configured channels have individually programmable threshold levels that can range from -46V to +46V.

Identifying the Plug-on (IMPORTANT)

There are two versions of the E1538A. The early version does not support a PERiod measurement command set. Early versions have ROM revision February 1998 and earlier. The later version adds period measurement, and an improved frequency measurement function. The later versions have ROM revision after February 1998.

In order to access the additional functions of the later E1538A, you must use one of the following drivers:

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The Plug & Play driver with revision A.02.07 or later

The Command Module driver with revision A.05.11 or later

To determine the driver revision, execute the *IDN? command.

Figure 1. Identifying the SCP and its ROM Revision

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 5