Tonghui TH2816B - GPIB Interface Capabilities Functions; GPIB Addressing; GPIB Bus Function; Data Format

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5.2.2 GPIB Interface Capabilities Functions
Table 7-1 lists TH2816B's GPIB capabilities and functions. These functions provide
the means for an instrument to receive, process, and transmit commands, data, and
status over the GPIB bus.
Table 7-2. GPIB Interface Capability
Code
Function
SH1
Complete Source Handshake capability
AH1
Complete Acceptor Handshake capability
T5
Basic Talker; Talk-Only; unaddressed if MLA; no serial poll
L4
Basic Listener; unaddressed if MTA; no Listen Only
SR0
No Service Request capability
RL1
Remote/Local capability
DC1
Device Clear capability
DT1
Device Trigger capability
C0
No Controller capability
E1
Drivers are open-collector
5.2.3 GPIB Addressing
TH2816B's GPIB address is stored in non-volatile memory and can be set to any
address from 0 to 30 by front panel key entry in the System Config page. When
TH2816B is shipped from the factory the default GPIB address is 8. For more
information, refer to “ 4.4.1.6 GPIB Address” in Chapter 4.
5.2.4 GPIB Bus Function
TH2816B will respond to the following bus commands.
 ABORT I/O (IFC)
ABORT I/O (IFC control line TRUE) halts all bus activity and deselects TH2816B.
 DEVICE CLEAR (SDC or DCL)
This command can be used with an address to clear a particular device (SDC :
selected device clear) or used without an address (DCL : clears all devices). The
Input buffer is cleared, output data buffer is cleared and bit 4 (MAV bit) of the
status byte is set to “0”, when TH2816B receives this command.
 LOCAL (GTL)
LOCAL returns control of a listening device to front panel control.
 LOCAL LOCKOUT (LLO)
LOCAL LOCKOUT disables the LOCAL operation of all devices on the bus. After
this command is sent you will be unable to operate TH2816B from the front panel
include the softkey LOCAL. Execute the LOCAL command to undo LOCAL
LOCKOUT.
 REMOTE
REMOTE sets TH2816B to the remote mode. When this command is sent, front
panel with the exception of LOCAL softkey will be disabled.
 TRIGGER (GET)
Enables TH2816B to the TRIGGER bus command. This command may be sent
to a selected device or to all devices addressed as listeners on the GPIB bus.
TH2816B must first be addressed as a listener, second the trigger mode is set to
the BUS trigger mode before the trigger message is sent. This command is equal
to the SCPI command TRIG+FETCh? or the common command *TRG.
5.3 Data Format
Th2817 outputs the measurement results using the ASCII via the GPIB bus. The
Format 1 is used by MeasDisplay page, BinNo. Disp page and Bin Count page,