ASR-3000 Series User Manual 
186 
Serial number : GXXXXXXXX 
Software version : XX.XX 
For further details, please see the programming 
manual, available on the GW Instek web site @ 
www.gwinstek.com. 
RS232 Remote Interface 
 
Baud rate, data bits, parity, stop 
bits. 
2: RxD (Receive data) 
3: TxD (Transmit data) 
5: GND 
4, 6 ~ 9: No connection 
Use a Null Modem connection (RS232C cable) as 
shown in the diagram below. 
 
ASR-3000 PC
RxDPin2 RxD Pin2
GNDPin5 GND Pin5
TxD Pin3
TxDPin3
1.  Connect the RS232C cable from the 
PC to the rear panel RS232 port.  
2.  Press the Menu key. The Menu 
setting will appear on the display. 
3.  Use the scroll wheel to go to item 5, RS232C and 
press Enter.