DigitalEQTM Re eiver Hub Produ t Installation
Manual Models NV-872, NV-1672 and NV-3272
The Digital EQTM Receiver Hub is an active (ampli-
fied) hub that allows the transmission of real-time
monochrome or color video for distances up to one
mile (1,6km) using Category-rated Unshielded
Twisted-Pair (UTP) wire. Note: PAL video does require
the use of Category-5 or better at 1 mile (1,6km). The
receiver hub continuously and automatically compen-
sates for cable attenuation, ground-loops, and wiring
polarity, independent of the video signal image. The
1U high hub is equipped with multi-stage transient
protection.
The NV-872 is an 8-port receiver with four DA out-
puts per channel. The NV-1672 is a 16-port receiver
with two DA outputs per channel. The NV-3272 is a
32-port receiver with one output per channel.
Wire Type
The DigitalEQTM UTP Receiver Hub operates best with
category-rated Unshielded twisted-pair (UTP) wire. It
may also be used with category-rated foiled twisted-
pair (FTP) wire, or with multi-pair wire with an overall
shield (6 or more pairs). Wire gauges of 24 to 16 AWG
(0,5 to 1,3mm) are supported.
Shielded twisted-pair (STP) wire may also be used,
up to a maximum distance of 1,000ft (300m).
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 signals
near electromagnetic fields (in accordance with
National Electrical Code, and other local safety
requirements.
Do NOT use un-twisted wire. Due to near-end
crosstalk, do not send a transmit and a receive signal
in the same wire bundle. Exception: Up to 1,000ft
(300m); or 2,000ft (600m) Category 5 or better.
Up-the-Coax Pan/Tilt/Zoom telemetry signals are
NOT supported. Use a second wire-pair for RS-422 or
RS- 485 signals instead.
NVT recommends the use of factory-crimped R 45
patch cables rather than unreliable field-crimped R 45s
to connect between the NVT deviceand an adjacent
female R 45 jack.
Wire Distan e
It is recommended that the wire distance be measured
to ensure that it does not exceed 3,000ft (1km), or
1 mile 5,280ft (1,6km) if the transmitter is an NV-653T.
Re ommended Wire Distan e:
All measured distances include any coax in the path.
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.
Loop Resistan e per 1,000ft (300m)
24 AWG (0,53 mm) = 52 ohms
23 AWG (0,57 mm) = 42 ohms
22 AWG (0,64 mm) = 33 ohms
20 AWG (0,81 mm) = 21 ohms
19 AWG (0,91 mm) = 16 ohms
18 AWG (1,02 mm) = 13 ohms
Wire in underground conduit or wet locations must be
polyethylene-jacketed, gel-filled. Wire in plenum envi-
ronments must be plenum-rated, per local codes.
Conne ting the Camera End
Use any NVT passive transceiver, (such as the
NV-214A-M) or qualified OEM camera with built-in UTP
output, or the NV-653T Active Transmitter. Install per the
instructions that come with the transmitting device.
1) Re d these instructions.
2) Keep these instructions.
3) Heed ll w rnings.
4) Follow ll instructions.
5) Do not use this pp r tus ne r w ter.
6) Cle n only with dry cloth.
7) Do not block ny ventil tion openings.
8) Inst ll in ccord nce with the m nuf cturer’s instructions.
9) Do not inst ll ne r ny he t sources such s r di tors,
he t registers, stoves or other pp r tus (including DVRs)
th t produce he t.
10) Do not defe t the s fety purpose of the pol rized or
grounding-type plug. A pol rized plug h s two bl des with
one wider th n the other. A grounding type plug h s two
bl des nd third grounding prong. The wider bl de or the
third prong re provided for your s fety. If the provided plug
does not fit into your outlet, consult n electrici n for repl ce-
ment of the obsolete outlet.
11) Protect the power cord from being w lked on or pinched
p rticul rly t plugs, convenience recept cles, nd the point
where they exit from the pp r tus.
12) Only use tt chments/ ccessories specified by the
m nuf cturer.
13) Use only with c rt, st nd, tripod, br cket, or t ble spec-
ified by the m nuf cturer, or sold with the pp r tus. When
c rt is used, use c ution when moving the c rt/ pp r tus
combin tion to void injury from tipover.
14) Unplug this pp r tus during lightning storms or when
unused for long periods of time.
15) Refer ll servicing to qu lified service personnel. Servic-
ing is required when the pp r tus h s been d m ged in ny
w y, such s power supply cord or plug is d m ged, liquid
h s been spilled, or objects h ve f llen into the pp r tus,
the pp r tus h s been exposed to r in or moisture, does
not oper te norm lly, or h s been dropped.
This installation should be made by a qualified
service person and should conform to all local codes.
WARNING - Do not install the unit in an environ-
ment where the operating ambient temperature exceeds
1220° F (50° C). The ventilation should not be impeded
by covering the ventilation openings with items, such as
newspapers, table-cloths, curtains, etc. No naked flame
sources, such as lighted candles should be placed on
the apparatus.
IMPORTANT SAFETY INSTRUCTIONS
TO REDUCE THE RISK OF ELECTRICAL SHOCK,
DO NOT REMO E CO ER OR BACK. NO USER
SER ICEABLE PARTS INSIDE. REFER SER ICING
TO QUALIFIED SER ICE PERSONNEL.
WARNING: TO REDUCE THE RISK OF ELECTRI-
CAL SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE.
WARNING - Do not interconnect multiple
outputs.
WARNING - The apparatus shall not be exposed
to dripping or splashing and no objects filled with
liquids, such as vases, shall be placed on the
apparatus.
WARNING - Use only a Certified power cord and
plug (coupler / mains) assemblies for location
installed.
WARNING - Power cord is regarded as main
disconnect.
WARNING - The appliance coupler (power
cord/mains) shall remain readily operable.
WARNING - For safety, never put N T signals in
the same conduit as high-voltage wiring.
WARNING - Do not restrict airflow around any
active powered N T products.
Cat 5 Wire Distance
Cat 5 Wire Distance
235
315
400
475
550
630
700
780
3 MHz
4 MHz
5 MHz
6 MHz
9 MHz
8 MHz
7 MHz
10 MHz
100ft
Camera Lines of Resolution
Frequency
300ft
1,000ft
1 mile
3,000ft
10,000ft
30m
100m
300m
1,6km
1km
3km
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