
Programming Guide 1-7
ESG Family Signal Generators Preparing for Use
Setting up the Equipment for Remote Operation
Serial Interface (RS–232) Overview
You can also control the signal generator using the rear-panel serial RS-232 serial port
(labeled AUXILIARY INTERFACE). All of the functionality provided by GPIB is available
using the rear-panel serial interface, except for indefinite blocks, serial polling, GET,
non-SCPI remote languages, and remote mode.
Commands are sent over the serial interface via a controller’s language system. HP BASIC
is the language used in the programming examples in this book. BASIC was selected
because the majority of GPIB computers have BASIC language capability, but other
languages can also be used. For more detail on using HP Basic, see “Programming the
Signal Generator” on page 1-9. For information regarding RS-232 operating parameters
such as handshake, baud rate, character format, and parity, see “Overview of Serial
Interface (RS-232) Programming” on page 1-10.
RS-232 Serial Interconnecting Cables
The signal generator’s serial connector enables you to connect the signal generator to a
serial port on a personal computer. The connector’s pin configuration shown in Table 1-4.
Only one instrument per RS-232 port on the computer may be connected at any given time.
The additional items required when using a serial interface are listed in Table 1-5.
Table 1-4. The RS-232 Connector
Pin Number Signal Description Signal Name
1 No Connection
2 Receive Data RECV
3Transmit Data XMIT
4+5V
5 Ground, 0V
6 No Connection
7 Request to Send RTS
8Clear to Send CTS
9 No Connection
Table 1-5. Additional Equipment Required for Serial Interface
Quantity Description Agilent Part Number
1 Serial RS-232 cable
9-pin (male) to 9-pin (female)
8120-6188
1
RS-232 null modem (male-male)
1
1.Ensure proper pin connections between computer and signal generator.
5158-6639
1 Serial RS-232 adapter (female-female) 1252-7825
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