PDG-2515/2520 Operating Manual
Page 36
MNPDG2515-2520R0.doc
© 2004 Directed Energy, Inc.
Communications and Remote Operation:
The PDG25xx series of pulse generators have the option of a communications
interface. The options are RS232 or GPIB interface. Both interfaces take the
same ascii based command set, although the strings are terminated differently.
The unit will reply at least one byte on every command with the exception of the
changing of the GPIB address, and the changing of the baud rate. This allows
the user to communicate as quickly and as efficiently as possible. If the PDG unit
has been purchased with communications interface, the front panel will display a
REMOTE MODE menu that displays either the current GPIB address or the
current baud rate depending on the interface installed in the unit. This is provided
so that the user may know how to set up the communications interface from a
remote terminal upon powering up the unit if the communications settings are
unknown.
RS232 Operation:
The default baud rate on the RS232 interface is 115200. Switching the baud
rate is possible, and will be saved in non-volatile memory, but the unit will not
respond in a command to make GUI interfaces easier to implement without
closing out and re-opening a COMM PORT before a reply is issued. The send
and return strings are ASCII based framed after a SCPI protocol. The string is
TERMINATED BY A RETURN (‘\r’) CHARACTER. After the unit receives the
return character the command will be parsed, processed and a reply will be
generated so that the next command may be sent. Be aware that some
commands complete significantly faster than others, the load and save
configuration command could take up to 400 milliseconds to complete due to
the overhead associated with the commands. The response from the unit will
be terminated with a ‘\r’ character as well; this makes the implementation and
design of a GUI much simpler and more efficient than a timeout.
GPIB Operation:
The default address of the GPIB interface is 1. Switching the address is
possible and will be saved in non-volatile memory, but be aware that the unit
will not respond in a command to make GUI interfaces easier to implement
without closing out and re-opening a new address on the remote interface
before a reply is issued. The send and return strings are ASCII based framed
after a SCPI protocol. The string is TERMINATED BY AN EOI line assertion –
there is no termination character, sending one will only end in a
communications error. After the unit receives the EOI the command will be
parsed, processed and a reply will be generated so that the next command
may be sent. Be aware that some commands complete significantly faster
than others, the load and save configuration command could take up to 400
milliseconds to complete due to the high overhead. The response from the
unit will be terminated with a EOI as well, this makes the implementation and
design of a GUI much simpler.
Summary of Contents for PDG-2515
Page 2: ...THE PULSE OF THE FUTURE ...
