Agilent Technologies 6811B User Manual page 29

RS-232 Interface
The ac source provides an RS-232 programming interface, which is activated by commands located under
the front panel Address key. When the RS-232 interface is selected, the GPIB interface is disabled.
NOTE: Sending or receiving data over the RS-232 interface when not configured for REMOTE
operation can cause unpredictable results. Always make sure the ac source is configured
for remote operation when using the RS-232 interface.
Interface Commands
All SCPI commands are available through RS-232 programming. The SYSTem:LOCal,
SYSTem:REMote, and SYSTem:RWLock commands are only available through the RS-232 interface.
SYSTem:LOCal
SYSTem:REMote
SYSTem:RWLock
RS-232 Data Format
♦
constant 11-bit data format
♦
one start bit
♦
seven data bits plus a parity bit (even or odd parity), or eight data bits without parity (parity bit is
"0")
♦
two stop bits
You can specify one of the following baud rates: 300 600 1200 2400 4800 9600
NOTE: The ac source always uses one start bit and two stop bits regardless of the baud rate. The
number of start and stop bits is not programmable.
RS-232 Connector
The RS-232 connector is a DB-9, male connector. You can connect the ac source to any computer or
terminal with a properly configured DB-25 connector. You can use a standard
interface cable.
1 2 3 4 5
6 7 8 9
Places the ac source in local mode during RS-232 operation.The front panel keys
are functional.
Places the ac source in remote mode during RS-232 operation. All front panel
keys except the LOCAL key are disabled.
Places the ac source in remote mode during RS-232 operation. All front panel
keys including the LOCAL key are disabled.
Table 2-2. RS-232 Connector
Pin
1
2
3
4
5
6
7
8
9
Agilent
Input/Output Description
Output Reserved for service use
Input Receive Data (RxD)
Output Transmit Data (TxD)
Output Data Terminal Ready (DTR)
Common Signal ground
Input Data Set Ready (DSR)
no connection
no connection
Output Reserved for service use
Installation - 2
24542G or 24542H
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