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C4 Manual Rev 7.5.2
7. REMOTE MODE
Remote mode provides for control of the C4 from a remote computer or terminal
using either standard EIA-232 serial communication or Instrumentation Standard
IEEE-488 (GPIB) communication. Selection of the type of interface is made from
the setup mode, see Section 8.
NOTE: The IEEE-488.2 requirement for lockout of front panel control during
IEEE-488 control is not enabled in this controller. The front panel mode switch
remains active during remote control.
In remote mode, the C4 is controlled externally by sending a 2 character ASCII
command over the bus followed by an optional set of parameters, and ending with
a terminator. For both IEEE-488 and EIA-232 communication, the terminator is
Carriage Return & Line Feed (13,10 decimal) (0Dh 0Ah). For IEEE-488 command
structure, see Appendix 9.4.
7.1 EIA-232 Interface
The controller may communicate remotely through an EIA-232 interface. To use
EIA-232 communication, the interface must be selected for EIA-232 remote
communication in Setup mode. Additionally, the interface must be software
selected for proper baud rate, parity, data bits and stop bits. These are also set
through the keypad in Setup mode and become stored in the non- volatile memory.
See Section 8, Setup Mode.
A female DB-25 connector is provided on the rear panel. The interface is set up as
a DCE with DTR and CTS set always true.
7.2 IEEE-488 Interface
The IEEE-488 interface is implemented as a Talker/Listener without extended
addressing or parallel poll capability. The primary address is selected through the
keypad in Setup mode. A standard IEEE-488 connector is provided on the rear
panel. (See sample commands in Appendix 9.4.)