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4.5 RS-232C XON/XOFF Handshaking Protocol
The 2832-C uses the XON/XOFF handshaking protocol. When the 2832-C’s 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 2832-C
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 suspend
all transmission of characters to the remote computer until the XON
character is received.
4.6 GPIB Communication
A variety of third party GPIB communication hardware and software, such as
plug-in GPIB computer boards and Lab View software from National Instruments
exists. The 2832-C should work with any of these as long as they
adhere to the IEEE 488.1 standard. This manual assumes the user is familiar
with one of these third party hardware/software packages. The table below
summarizes the IEEE 488.1 capabilities supported by the 2832-C.
Table 20 – Model 2832-C IEEE 488.1 Capabilities Summary
Description Command Level of Capability
Source Handshake SH1 complete capability
Acceptor Handshake AH1 complete capability
Talker T6 basic talker, serial poll, unaddress if MLA
Extended Talker TE0 no capability
Listener L4 basic listener, unaddress if MTA
Extended Listener LE0 no capability
Service Request SR1 complete capability
Remote Local RL0 *no capability
Parallel Poll PP1 remote configuration
Device Clear DC1 complete capability
Device Trigger DT0 no capability
Controller C0 no capability
NOTE
* In order to better handle the RS-232C 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 GPIB 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 GPIB is factory set to 5. (See Section 2.4.11)
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