Testhead	Pogo Ring 3 Bottom Board			Y0003ABx Bottom Board			Special Notes
Pogo Pin	H#	Pin#	Description	H#	Pin#	Description
1	0	1	CBIT1	2	1	CB1
2	0	2	CBIT2	2	2	CB2
3	0	3	CBIT3	2	3	CB3
4	0	4	CBIT4 - 100k	2	4	CB4
5	0	5	CBIT5 - CLK	2	5	CB5
6	0	6	CBIT6 - WD	2	6	CB6
7	0	7	CBIT7 - STB	2	7	CB7
8	0	8	CBIT8 - RD	2	8	CB8
9	0	9	-5V	2	9	-5V
10	0	10	+5V	2	10	+5V
11	1	1	VCC RETURN	2	11	VRTN	Chassis gnd thru power supply board
12	1	2	-12V	2	12	-12V
13	1	3	+12V	2	13	+12V
14	1	4	+28V	2	14	+28V
15	1	5	FIXTURE S/N	2	15	S/N
16	1	6	SPARE	2	16	SP	Testhead pogo pin is removed
							3AB board H2 pins 17-20 are no connect
17	1	7	HI C3 SENSE	3	3	V3S
18	1	8	HI C2 SENSE	3	6	V2S
19	1	9	HI C RETURN SENSE	3	8	RS	Defines gnd for the VIs. S/B connected to gnd at the DUT. Hi impedance input.
20	1	10	HI C1 SENSE	3	10	V1S
21	2	1	SHIELD21	2	21	GND	Chassis gnd thru DB9-16 board (VI-M5)
22	2	2	OP1 (DB9)	2	22	DB9
23	2	3	OP2 (DB10)	2	23	DB10
24	2	4	OP3 (DB11)	2	24	DB11
25	2	5	OP4 (DB12)	2	25	DB12
26	2	6	OP5 (DB13)	2	26	DB13
27	2	7	OP6 (DB14)	2	27	DB14
28	2	8	OP7 (DB15)	2	28	DB15
29	2	9	OP8 (DB16)	2	29	DB16
30	2	10	SHIELD30	2	30	GND	Chassis gnd thru DB9-16 board (VI-M5)
31	3	1	SHIELD31	2	31	GND	Chassis gnd thru DB1-8 board (VI-M1)
32	3	2	DB1	2	32	DB1
33	3	3	DB2	2	33	DB2
34	3	4	DB3	2	34	DB3
35	3	5	DB4	2	35	DB4
36	3	6	DB5	2	36	DB5
37	3	7	DB6	2	37	DB6
38	3	8	DB7	2	38	DB7
39	3	9	DB8	2	40	DB8
40	3	10	SHIELD40	2	39	GND	Chassis gnd thru DB1-8 board (VI-M1)
41	4	1	SHIELD41	1	1	GND	Chassis gnd thru VCC5-6 board (VCC-M7)
42	4	2	VCC5 FORCE	1	2	V5F
43	4	3	VCC5 SENSE	1	4	V5S
44	4	4	VCC6 FORCE	1	3	V6F
45	4	5	VCC6 SENSE	1	6	V6S
46	4	6	VCC7 FORCE	1	5	V7F
47	4	7	VCC7 SENSE	1	8	V7S
48	4	8	VCC8 FORCE	1	7	V8F
49	4	9	VCC8 SENSE	1	10	V8S
50	4	10	SHIELD50	1	9	GND	Chassis gnd thru VCC7-8 board (VCC-M11)
51	5	1	SHIELD51	1	12	GRD	Chassis gnd thru DP1-8 relay board (VCC-M10)
52	5	2	DP1	1	11	DP1
53	5	3	DP2	1	14	DP2
54	5	4	DP3	1	13	DP3
55	5	5	DP4	1	16	DP4
56	5	6	DP5	1	15	DP5
57	5	7	DP6	1	18	DP6
58	5	8	DP7	1	17	DP7
59	5	9	DP8	1	20	DP8
60	5	10	SHIELD60	1	19	GND	Chassis gnd thru DP1-8 relay board (VCC-M10)
61	6	1	SHIELD61	1	22	GRD	Chassis gnd thru DP9-16 relay board (VCC-M2)
62	6	2	DP9	1	21	DP9
63	6	3	DP10	1	24	DP10
64	6	4	DP11	1	23	DP11
65	6	5	DP12	1	26	DP12
66	6	6	DP13	1	25	DP13
67	6	7	DP14	1	28	DP14
68	6	8	DP15	1	27	DP15
69	6	9	DP16	1	30	DP16
70	6	10	GND SENSE70	1	29	GREF	Defines gnd for all VCC and VMeas. Hi impedance input. S/B grounded at DUT
71	7	1	SHIELD71	1	32	GRD	Chassis gnd thru VMeas board (VCC-M1) DO NOT USE THIS PIN This pin is cut on all standard bottom plates.
72	7	2	VMEAS1	1	31	VM1
73	7	3	VMEAS1N	1	34	VM1N
74	7	4	VMEAS2	1	33	VM2
75	7	5	VMEAS2N	1	36	VM2N
76	7	6	VMEAS3	1	35	VM3
77	7	7	VMEAS3N	1	38	VM3N
78	7	8	VMEAS4	1	37	VM4
79	7	9	VMEAS4N	1	40	VM4N
80	7	10	SHIELD80	1	39	GND	Direct to Chassis. Pin is raised on pogo ring
HC1			HI CURRENT 3	3	9	VI3	3AB board tied to HC1 and H3 pin 9
HC2			HI CURRENT 2	3	7	VI2	3AB board tied to HC2 and H3 pin 7
HC3			ANALOG RET			GND	Direct to chassis. 3AB board tied to mounting screw.
HC4			HI CURRENT RET	3	4,5	VI RTN	Chassis gnd thru VI boards. S/B i return path for VIs. 3AB board tied to HC4 and H3 pins 4&5.
HC5			HI CURRENT 1	3	1,2	VI1	3AB board tied to HC5 and H3 pins 1&2

Notes:
1. If the option does not exist, the corresponding ground may not be present. For example, the gnd thru the VCC7-8 board will only be present if the system contains VCC7 and 8.


The following diagram is the 10-pin header on the fixture power board inside the testhead