Quatech DS-100 user manual Serial 0 uses SW1 and SW2 Serial 1 uses SW3 and SW4

Switch on

bit = 0

Switch off bit = 1

Serial 0 uses SW1 and SW2 Serial 1 uses SW3 and SW4

Factory default setting for Serial 1 --- 03F8 hex (COM1)

SW1

ON
1	2	3	4	5	6	7	8
0	0	0	0	0	0	2	1
		0				3

SW2						enable/disable
	ON
1		2	3	4	5		6
8		4	2	1	8
			F		8

Factory default setting for Serial 2 --- 02F8 hex (COM2)

SW3

ON
1	2	3	4	5	6	7	8
0	0	0	0	0	0	2	0
		0				2

Example: 03E8 hex (typical for COM3)

ON

1	2	3	4	5	6	7	8
0	0	0	0	0	0	2	1
		0				3

Example: 02E8 hex (typical for COM4)

ON

1	2	3	4	5	6	7	8
0	0	0	0	0	0	2	0
		0				2

SW4					enable/disable
	ON
1		2	3	4	5	6
8		4	2	1	8
			F		8
					enable/disable
	ON
1		2	3	4	5	6
8		4	2	0	8
			E		8
					enable/disable
	ON
1		2	3	4	5	6
8		4	2	0	8
			E		8

Figure 6 --- Serial Port base I/O address selection switches

4-2 Quatech Inc.