User's Manual

11-6 68P81093C75-A
Figure 19. PDR 3500 Schematic—Part II (Sheet 1 of 2)
5
J2
68
J2
71
J21
J8
58
72
J9
74
J9
69
J9
71
J9
J9
51
20
J9
J9
40
J9
41
J9
50
J9
30
J9
39
M20
M9
29
J9
J5
2
J5
3
J5
4
J5
1
J5
59
J2
80
J2
79
J2
72
M19
J7
80
M17
J8
5
LN+5
76
J9
79
J9
75
J9
J5
24
J2
73
J5
22
J5
23
J2
25
J2
26
57
J5
35
J5
36
J5
J5
19
J5
20
J5
21
J5
18
J9
23
33
J9
68
J5
31
J5
32
J5
M18
J5
29
J5
30
J7
79
M16
49
J7
73
J9
A+
J9
6
J2
23
J2
24
13
J9
14
J9
J7
19
J7
17
J9
24
J5
79
J5
80
28
J5
72
J5
73
J5
27
J5
27
8
J9
9
J9
10
J2
J9
7
J2
1
J9
3
J9
56
A+
J9
A+
J7
5
J7
J8
26
J8
27
J5
25
J8
13
J8
14
64
J2
67
J8
6
A+
J2
J7
21
J7
22
SW+5
J7
18
J7
52
J7
20
J7
16
J7
24
J7
14
J7
15
J7
10
J7
11
J7
9
J5
34
J5
68
J5
71
32
SW+5
J2
30
J2
31
J2
J2
18
J2
28
J2
29
J2
2
J2
3
J2
4
J8
65
8
J9
48
J7
7
J7
J5
26
J2
63
J2
22
J9
11
J9
12
SW+5
J7
54
J7
57
J7
58
51
J7
53
23
J9
47
J7
J7
13
J7
3
J7
4
J7
J6
80
J7
12
J6
38
SW+5
J6
79
J2
33
J2
34
J5
67
21
J2
35
J2
36
J2
19
J2
20
J2
71
J8
72
J8
73
J8
70
J8
J8
48
J8
55
J8
66
J8
47
J8
31
J8
38
28
J8
30
J8
DATA
2
GND
1
NC
3
NC1
4
NC2
5
NC3
6
J2
61
U10
66
J7
72
J2
59
62
J7
65
J7
J7
61
J7
J9
19
J9
44
J7
1
J7
2
J9
45
J5
64
J8
29
J9
1
J9
2
J5
63
77
J8
79
J8
75
J8
J8
45
J8
46
J20
9
6
J22
J9
80
VR6
5.6V
78
J8
76
J8
80
J8
J7
49
J22
8
J9
66
46
2
3
4
5
1
J9
J6
53
W1
PTT_REQ_EX
PTT_REQ_SC
COAX_GND
VFINALFORWARD
X2MUX
X3MUX
Y2MUX
Y3MUX
PATEMP
AMUXCTRL
BMUXCTRL
3
L14 and C8 function as a low-pass filter to block
interference at the switching frequency of U6
(500kHz) from reaching A+ and getting out of the
station on AC or DC power wires. The filter is
necessary for the station to meet FCC guidelines
for line conducted emissions. R86 and R87 allow
the filter to be bypassed if necessary in future
designs, but in normal use, R86 should not be
placed, and R87 should be a 0Ω jumper.
R56 and R57 are included to provide for a
unidirectional crosspatch between stations using a
single RJ-45 cable. In normal use, the resistors
should not be placed.
W1 is a connection for Ethernet. The ground on
W1 should remain isolated from chassis ground.
M1 through M25 are for future addition of a MRTI
connector.
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2
3
4