CMU Connecting the CMU to the Test Setup
1100.4903.12 1.15 E-10
Connection via serial
interface
COM 1
The CMU can be connected to the serial interface of a controller via one of
the serial interfaces COM 1 or COM 2 and a so-called null-modem cable.
The pin assignment and wiring of a null-modem cable are described in
section Handshake of chapter 8. The technical specifications of the serial
(RS-232-C) interface are also discussed in chapter 8 (refer to section
Hardware Interfaces).
Either a 25-pin or a 9-pin connector can be used on the controller side. It
may be necessary to use an appropriate adapter (see chapter 8, Hardware
Interfaces).
Selection
! Proceed as described above to activate the Remote tab of the Setup
menu.
! In the Port table row, select COM 1 or COM 2 to activate one of the RS-
232 interfaces for data transfer.
Configuration
After selection of a serial interface, the transmission parameters must be set
to comply with the parameters of the addressed device. This is done in the
Comm. (communications) tab of the Setup menu:
! To open the Setup – Comm. tab press the SETUP key at the front of the
instrument and activate the Comm. hotkey at the lower edge of the
screen.
! In the table section corresponding to the selected COM port check the
settings for the Baudrate, Data Bits, Parity, and Protocol.
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