RS232C
XON/XOFF
Handshaking
Protocol
The 2832-C uses the XON/XOFF handshaking protocol. When the 2832-C'~
RS
232 input buffer is nearly full the 2832-C will send an XOFF (ASCII encoded 19
decimal) character to the remote computer. The XOFF character informs the
remote computer that it needs to suspend transmission until it receives the
XON character from the
2832-C. When the buffer empties sufficiently the 28324
will send an XON (ASCII encoded 17 decimal) to signal the remote computer
that it can resume transmission.
The 2832-C will also respond to XOFF and XON characters sent to it from the
remote computer. When the 2832-C receives an XOFF character it will sus-
pend all transmission of characters to the remote computer until the XON
character is received.
GPIB Communication
A variety of third party GPIB communication hardware and software, such
as
plug-in GPlB computer boards and Lab View software from National Instru-
ments exists. The 2832-C should work with any of these as long as they
adhere to the
lEEE 488.1 standard. This manual assumes the user is familiar
with one of these third party hardware/software packages. The table below
summarizes the lEEE 488.1 capabilities supported by the 2832X.
Table
20
-
Model
2832C
IEEE
488.1
Capabilities Summary
Description Command Level of Capability
Source Handshake
Acceptor Handshake
Talker
Extended Talker
Listener
Extended Listener
Service Request
Remote Local
Parallel Poll
Device Clear
Device Trigger
Controller
SH
1
AH
1
T6
TEO
L4
LEO
SR
1
RLO
PP 1
DC
1
DTO
co
complete capability
complete capability
basic talker, serial poll, unaddress if MLA
no capability
basic listener, unaddress if MTA
no capability
complete capability
*no capability
remote configuration
complete capability
no capability
no capability
NOTE
In order to better handle the RS232C interface the 2832-C automatically
goes into remote mode when a command is received from either of the
remote computer interfaces. The
LLO command
is
used to enable or disable
the local lockout state.
4.6.1
Setting
The
GPIB
Address
Before communicating with the 2832-C GPlB port the 2832-C GPIB address
must be set. The address can be between 0 and 30. The address can only be
set from the keypad and is accessed through the menu structure. To set the
GPIB address select the REMOTE
SETUP->GPIB ADDRESS option in the menu.
The Model 2832-C GPlB
is
factory set to
5.
(See Section 2.4.1 1)
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