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What Are the DIP Switch Settings for the GPIB-400?

Hardware: GPIB>>Support Products>>GPIB-410

Problem: What are the DIP switch settings for the GPIB-400?

Solution: The GPIB-400 is an older product that National Instruments produced. It is a GPIB bus tester that has toggle switches on the front for controlling different GPIB lines. It can perform some functions of an analyzer, such as providing acceptor handshakes and giving line status at any given time. The box also has a serial (RS-232) port on the back for dumping data from the bus. Some of the functionality of the GPIB-400 is controlled by two DIP switches inside the box. The functionality of those switches is documented here.

A "0" setting means the DIP switch is in the ON position. A "1" setting means the DIP switch is in the OFF position.

U18 selects the baud rate:
S0	S1	S2	S3	S4	Baud Rate
	
0	0	0	0	1	19200
0	0	1	0	0	50
0	0	1	1	0	75
0	1	0	0	0	134.5
0	1	0	1	0	200
0	1	1	0	0	600
0	1	1	1	0	2400
1	0	0	0	0	9600
1	0	0	0	0	4800
1	0	0	1	0	1800
1	0	1	0	0	1200
1	0	1	1	0	2400
1	1	0	0	0	300
1	1	1	0	0	150
1	1	1	1	0	110

U20 selects the RS232 configuration:
Switch       Description
	
EPS          Even Parity Enable
              1 for even parity, 0 for odd parity
	
NB1, NB2     Word Length Select
              NB2   NB1   Word Length
               0     0      5 bits
               0     1      6 bits
               1     0      7 bits
               1     1      8 bits
	
TSB          Stop Bit Select
              0 for one STOP bit, 1 for two STOP bits
	
NP           Parity Inhibit
              1 for no parity generation
	
20MA         RS232/20 MA terminal operation
              0 for RS232, 1 for a 20 mA current loop


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Report Date: 10/24/1997
Last Updated: 09/18/2002
Document ID: 12N9S7RV

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