Pin assignments, Db9 to db9 wiring – GW Instek GDS-800 Series Programming Manual User Manual
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GDS-806/810/820/840 Programming Manual
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Notes for RS-232 Configuration
This oscilloscope contains a DB 9-pin, male RS-232 connector for serial
communication with a computer or terminal. The RS-232 interface of this
oscilloscope is configured as an RS-232 “Data Terminal Equipment”, so that data
is sent from pin 3 and received on pin 2. For remote controls, the RS-232 interface
has to be connected with a computer or terminal.
Pin Assignments
The pin assignments for RS-232 interface of the oscilloscope are listed below.
1. No
connection
2. Receive
Data(RxD)
(input)
3. Transmit
Data(TxD)
(output)
4. No
connection
5. Signal
Ground
(GND)
6. No
connection
7. No
connection
8. No
connection
9. No
connection
Figure 1-1: Pin assignments for the RS232 connector
DB9 to DB9 Wiring
The wiring configuration is used for computer with DB9 connectors that configured
as Data Terminal Equipment.
Oscilloscope
(DB9, DTE)
Computer
(DB9, DTE)
Pin2
Pin3
Pin2
Pin3
Pin5
Pin5
Figure 1-2: DB9 to DB9 wiring