What is the layout of the 37 pin Sub-D connectors on the AD-box with passive inputs?
 
Standard, the ActiveTwo AD-box is produced with inputs for active electrodes and the top of the AD-box has 8 x 68 pin SCSI connectors.
But the AD-box can also be configured with inputs for passive electrodes.
When the AD-box is configured with passive electrode inputs, the top of the AD-box has 8 x 37 pin Sub-D connectors.
Passive amplifier modules have a lower gain then active amplifier modules.
Active amplifier modules have a gain of: LSB = 31.5 nVolt.
Passive amplifier modules have a gain of: LSB = 125 nVolt.
Because of this lower gain, the configuration file of ActiView will have to be changed, so ActiView will set the correct gain in its .BDF header.

Open the .cfg file of ActiView in Notepad or Wordpad and search for the following line and change the value to '1'
  ElecGain=0 //0: 31.25nV/bit, 1: 125nV/bit
     
So it will read:
  ElecGain=1 //0: 31.25nV/bit, 1: 125nV/bit
     

 

Pin connections of the 8 x Sub-D connectors on the top of a Passive AD-box:

37 pin Sub-D connector
Flatcable wire
Connector A
Connector B
Connector C
Connector D
 Connector E
 Connector F
 Connector G
 Connector H
01
01
Channel 01
Channel 33
Channel 65
Channel 97
Channel 129
Channel 161
Channel 193
Channel 225
02
03
Channel 02
Channel 34
Channel 66
Channel 98
Channel 130
Channel 162
Channel 194
Channel 226
03
05
Channel 03
Channel 35
Channel 67
Channel 99
Channel 131
Channel 163
Channel 195
Channel 227
04
07
Channel 04
Channel 36
Channel 68
Channel 100
Channel 132
Channel 164
Channel 196
Channel 228
05
09
Channel 05
Channel 37
Channel 69
Channel 101
Channel 133
Channel 165
Channel 197
Channel 229
06
11
Channel 06
Channel 38
Channel 70
Channel 102
Channel 134
Channel 166
Channel 198
Channel 230
07
13
Channel 07
Channel 39
Channel 71
Channel 103
Channel 135
Channel 167
Channel 199
Channel 231
08
15
Channel 08
Channel 40
Channel 72
Channel 104
Channel 136
Channel 168
Channel 200
Channel 232
09
17
Channel 09
Channel 41
Channel 73
Channel 105
Channel 137
Channel 169
Channel 201
Channel 233

10

19
Channel 10
Channel 42
Channel 74
Channel 106
Channel 138
Channel 170
Channel 202
Channel 234
11
21
Channel 11
Channel 43
Channel 75
Channel 107
Channel 139
Channel 171
Channel 203
Channel 235
12
23
Channel 12
Channel 44
Channel 76
Channel 108
Channel 140
Channel 172
Channel 204
Channel 236
13
25
Channel 13
Channel 45
Channel 77
Channel 109
Channel 141
Channel 173
Channel 205
Channel 237
14
27
Channel 14
Channel 46
Channel 78
Channel 110
Channel 142
Channel 174
Channel 206
Channel 238
15
29
Channel 15
Channel 47
Channel 79
Channel 111
Channel 143
Channel 175
Channel 207
Channel 239
16
31
Channel 16
Channel 48
Channel 80
Channel 112
Channel 144
Channel 176
Channel 208
Channel 240
17
33
Channel 17
Channel 49
Channel 81
Channel 113
Channel 145
Channel 177
Channel 209
Channel 241
18
35
Channel 18
Channel 50
Channel 82
Channel 114
Channel 146
Channel 178
Channel 210
Channel 242
19
37
Channel 19
Channel 51
Channel 83
Channel 115
Channel 147
Channel 179
Channel 211
Channel 243
20
02
Channel 20
Channel 52
Channel 84
Channel 116
Channel 148
Channel 180
Channel 212
Channel 244
21
04
Channel 21
Channel 53
Channel 85
Channel 117
Channel 149
Channel 181
Channel 213
Channel 245
22
06
Channel 22
Channel 54
Channel 86
Channel 118
Channel 150
Channel 182
Channel 214
Channel 246
23
08
Channel 23
Channel 55
Channel 87
Channel 119
Channel 151
Channel 183
Channel 215
Channel 247
24
10
Channel 24
Channel 56
Channel 88
Channel 120
Channel 152
Channel 184
Channel 216
Channel 248
25
12
Channel 25
Channel 57
Channel 89
Channel 121
Channel 153
Channel 185
Channel 217
Channel 249
26
14
Channel 26
Channel 58
Channel 90
Channel 122
Channel 154
Channel 186
Channel 218
Channel 250
27
16
Channel 27
Channel 59
Channel 91
Channel 123
Channel 155
Channel 187
Channel 219
Channel 251
28
18
Channel 28
Channel 60
Channel 92
Channel 124
Channel 156
Channel 188
Channel 220
Channel 252
29
20
Channel 29
Channel 61
Channel 93
Channel 125
Channel 157
Channel 189
Channel 221
Channel 253
30
22
Channel 30
Channel 62
Channel 94
Channel 126
Channel 158
Channel 190
Channel 222
Channel 254
31
24
Channel 31
Channel 63
Channel 95
Channel 127
Channel 159
Channel 191
Channel 223
Channel 255
32
26
Channel 32
Channel 64
Channel 96
Channel 128
Channel 160
Channel 192
Channel 224
Channel 256
33
28
Guard
Guard
Guard
Guard
Guard
Guard
Guard
Guard
34
30
Guard
Guard
Guard
Guard
Guard
Guard
Guard
Guard
35
32
Guard
Guard
Guard
Guard
Guard
Guard
Guard
Guard
36
24
CMS
--
--
--
--
--
--
--
37
36
DRL
--
--
--
--
--
--
--

 

 

Pin connections of the CMSDRL connector (DIN4) on the front of the AD-box:

Pin 1
Guard
Pin 2
CMS
Pin 3
DRL
Pin 4
DRL