Wiring Notes - Moog Videolarm QView QFDPT3-50NA User Manual

Videolarm qview qfdpt3-50na: user guide
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Wiring Notes

Wire — What to DO
1. DO use point-to-point Unshielded Twisted Pair wire, gauge 24 or
thicker, stranded or solid, Category 2, 3, 4, or 5.
2. The video signal may co-exist in the same wire bundle as other
video, telephone, data, control signals, or low-voltage power. It
is also OK to run NVT video signals in or near electromagnetic
fields (in accordance with National Electrical Code, local, or other
local safety requirements).
3. DO measure the wire distance. Use only transceivers that are
designed for that distance.
4. DO make sure the pair of wires carrying the video signal is sent
as a twisted pair (e.g. the blue-white/white-blue wires twisted
together as a pair), not a "split-pair" (e.g. blue-white conductor,
part of one pair/orange-white conductor, part of another pair).
Wire — What NOT to DO
1. DO NOT USE SHIELDED TWISTED PAIR WIRE. It will severely
degrade the distance performance. Short runs may be used with
some signal degradation (for example elevator traveler cables).
Multi-pair wire with an overall shield is OK.
2. DO NOT USE UN-TWISTED WIRE. It will reduce the NVT
product's inherent interference immunity.
3. DO NOT allow your installation to have "bridge-taps", loading
coils, talk-battery, or MOV type protectors. Bridge-taps are where
a twisted pair is connected to two twisted pairs (such as an
extension phone at home). Bridge-taps cause reflections as the
signal propagates, resulting in "ghosts" in the video image, and
are to be avoided.
4. If the phone company is providing the cable runs between
buildings, make sure it's "dry copper" i.e. it should have none
of the following: dial-tone, 48 volts, loading coils, bridge-taps,
switching, or long paths to the phone company's central office
and back.
5. Due to near-end crosstalk, DO NOT send a transmit and a
receive signal in the same wire bundle. Exceptions: Less than
1,000 ft (300m), or Category 5 cable, up to 2,000 ft (600m) are
OK.
6. DO NOT send "Up-the-Coax" Pan/Tilt/Zoom signals through
active (amplified) NVT transceivers.
7. For safety, never put NVT signals in the same conduit as
!
high-voltage wiring.
8. WARNING — to reduce a risk of fire or electrical shock, do
!
not expose this product to rain or moisture.
Measure your wire distance
Note: All NVT quoted distance specifications include any coax in the
run. It is recommended that the wire distance be measured to ensure
that the capability of the NVT product is correct.
Wire resistance may be measured with an ohm-meter by shorting
the two conductors together at the far end, and measuring the loop-
resistance out and back. Compare your readings with the charts in
the next column.
Unshielded Twisted-Pair Wire Gauge (AWG)
Cable
18
Distance
250 ft
3
300 ft
4
400 ft
5
500 ft
6
600 ft
8
800 ft
10
1000 ft
13
1250 ft
16
1500 ft
19
1750 ft
23
2000 ft
26
2500 ft
32
39
3000 ft
3500 ft
45
4000 ft
52
5000 ft
65
6000 ft
78
8000 ft
104
Unshielded Twisted-Pair Wire Gauge (AWG)
Cable
18
Distance
75 m
3
4
100 m
125 m
5
150 m
6
200 m
9
300 m
13
400 m
17
500 m
21
26
600 m
750 m
32
900 m
38
1000 m
43
1200 m
51
1500 m
64
1800 m
77
2400 m
102
Unshielded Twisted-Pair Wire Gauge (mm)
Cable
1.0
Distance
75 m
3
100 m
4
6
125 m
150 m
7
200 m
9
300 m
13
400 m
18
500 m
22
600 m
26
750 m
33
900 m
40
1000 m
44
1200 m
53
66
1500 m
1800 m
79
2400 m
106
- 5 -
19
20
22
24
4
5
8
13
5
6
10
16
6
8
13
21
8
10
16
26
10
12
19
31
13
16
25
42
16
20
32
52
20
25
40
65
24
30
48
78
28
35
55
91
32
40
63
104
40
49
79
131
48
59
95
157
56
69
111
183
64
79
127
209
80
99
158
261
95
119
190
313
127
158
253
418
19
20
22
24
4
5
8
13
5
6
10
17
7
8
13
21
8
10
16
26
10
13
21
34
16
19
31
51
21
26
42
69
26
32
52
86
31
39
62
103
39
49
78
129
47
58
94
154
52
65
104
171
63
78
125
206
78
97
156
257
94
117
187
309
125
156
249
411
0.8
0.7
0.6
0.5
5
6
9
13
7
9
12
18
8
11
15
22
10
13
18
27
13
17
24
36
20
26
36
54
27
35
48
72
33
43
60
90
40
52
72
108
50
65
89
135
60
78
107
162
66
86
119
179
80
104
143
215
100
130
179
269
120
155
215
323
159
207
286
431

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