9.4 Control and Measurement via RS-232C Interface
186
Setting the PC's communications speed
Use the same communications protocol settings as are being used by the instrument.
• Asynchronous
• Communications speed: 9600/19200/38400 bps (use same setting as instrument)
• Stop bits: 1
• Data length: 8 bits
• Parity check: None
• Flow control: None
9.4.2 Setting the RS-232C Communications Speed
Select with the F keys
Select a setting item
[RS com speed]
Display the
[Interface] page
Reboot the instrument when
changing the settings.
• When connecting the instrument to a controller (DTE), provide a cross cable that satis-
fies the specifications of both the instrument’s connector and the controller’s connector.
• If using a USB-serial cable, you may need a gender changer or straight/cross converter.
Provide a gender changer or straight/cross converter that satisfies the specifications of
both the instrument’s connector and the USB/serial cable’s connector.
The instrument’s I/O connectors implement terminal (DTE) specifications.
The instrument uses pin numbers 2, 3, 5, 7, and 8. Other pins are unused.
Pin
number
Compatible connection circuit name
CCIT circuit
number
EIA code JIS code
Common
code
1 Data channel receive
Carrier detect
Carrier Detect 109 CF CD DCD
2 Receive data Receive Data 104 BB RD RxD
3 Transmit data Send Data 103 BA SD TxD
4 Data terminal ready Data Terminal
Ready
108/2 CD ER DTR
5 Signal ground Signal Ground 102 AB SG GND
6 Data set ready Data Set Ready 107 CC DR DSR
7 Request to send Request to Send 105 CA RS RTS
8 Clear to send Clear to Send 106 CB CS CTS
9 Ring indicator Ring Indicator 125 CE CI RI
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