GDS-800 Series Digital Storage Oscilloscope Operation Manual
68
7. 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.
Note: RS-232 Interface is only available for GDS-820S, GDS-820C, GDS-840S,
and GDS-840C.
Pin Assignments
The pin assignments for RS-232 interface of GDS-820/GDS-840 series 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 7-1: Pin assignments for the GDS-820’s RS232 connector
DB9 to DB9 Wiring
The wiring configuration is used for computer with DB9 connectors that configured
as Data Terminal Equipment.
GDS-800 series
(DB9, DTE)
Computer
(DB9, DTE)
Pin2
Pin3
Pin2
Pin3
Pin5Pin5
Figure 7-2: DB9 to DB9 wiring
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