Models 2510 and 2510-AT User’s Manual Remote Operations 6-9
Table 6-2 provides pinout identification for the 9-pin (DB-9) or 25-pin (DB-25) serial port
connector on the computer (PC).
Front panel GPIB operation
This section describes aspects of the front panel that are part of GPIB operation, including
messages, status indicators, and the LOCAL key.
Error and status messages
During operation, various error and status messages associated with IEEE-488 program-
ming may be displayed (see Appendix B). The instrument can be programmed to generate
an SRQ, and command queries can be performed to check for specific error conditions.
GPIB status indicators
The REM (remote), TALK (talk), LSTN (listen), and SRQ (service request) annunciators
show the GPIB bus status. Each of these indicators is described below.
REM
This indicator shows when the instrument is in the remote state. REM does not necessarily
indicate the state of the bus REN line, as the instrument must be addressed to listen with
REN true before the REM indicator turns on. When the instrument is in remote, all front
panel keys, except for the DISPLAY TOGGLE/LOCAL key, are locked out. When REM
is turned off, the instrument is in the local state, and front panel operation is restored.
NOTE If LLO (Local LockOut) is in effect, LOCAL will be locked out. OUTPUT OFF is
still operational in remote.
Table 6-2
PC serial port pinout
Signal DB-9 pin number DB-25 pin number
DCD, data carrier detect 1 8
RXD, receive data 2 3
TXD, transmit data 3 2
DTR, data terminal ready 4 20
GND, signal ground 5 7
DSR, data set ready 6 6
RTS, request to send 7 4
CTS, clear to send 8 5
RI, ring indicator 9 22
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