Agilent Technologies 2110-0457, User Manual

Page: 62 / 212

Chapter 3 Front-Panel Operation and Features
RS-232 Interface Reference
61
3
RS-232 Interface Reference
The power supply can be connected to the RS-232 interface using the 9-pin
(DB-9) serial connector on the rear panel. The power supply is configured as
a DTE (Data Terminal Equipment) device. For all communications over the
RS-232 interface, the power supply uses two handshake lines: DTR (Data
Terminal Ready, on pin 4) and DSR (Data Set Ready, on pin 6).
The following sections contain information to help you use the power supply
over the RS-232 interface. The programming commands for RS-232 are
explained on page 97.
RS-232 Configuration Overview
Configure the RS-232 interface using the parameters shown below. Use the
front-panel key to select the baud rate, parity, and number of data bits
(
See page 48 for more information
).
• Baud Rate: 300, 600, 1200, 2400, 4800, or 9600 (
factory setting
)
• Parity and Data Bits: None / 8 data bits (
factory setting
)
Even / 7 data bits, or
Odd / 7 data bits
• Number of Start Bits:
1 bit ( fixed
)
• Number of Stop Bits:
2 bits ( fixed
)
RS-232 Data Frame Format
A character
frame
consists of all the transmitted bits that make up a single
character. The frame is defined as the characters from the
start bit
to the last
stop bit
, inclusively. Within the frame, you can select the baud rate, number of
data bits, and parity type. The power supply uses the following frame formats
for seven and eight data bits.
I/O
Config