Filter
Top Products
Crestron ST-TUNE Integrated AM/FM/TV Tuner
Operations Guide - DOC. 5833A Integrated AM/FM/TV Tuner: ST-TUNE •• 9
When calculating the wire gauge for a particular Cresnet run, the length of the run
and the load factor of each network unit to be connected must be taken into
consideration. If Cresnet units are to be daisy-chained on the run, the load factor of
each unit to be daisy-chained must be added together to determine the load factor of
the entire chain. If the unit is a home-run from a Crestron system power supply
network port, the load factor of that unit is the load factor of the entire run. The
length of the run in feet and the load factor of the run should be used in the following
resistance equation to calculate the value on the right side of the equation.
Resistance Equation
R = Resistance (refer to next table).
L = Length of run (or chain) in feet.
LF = Load factor of entire run (or chain).
R <
L x LF
40,000
Where:
The required wire gauge should be chosen such that the resistance value is less than
the value calculated in the resistance equation. Refer to the table below.
Wire Gauge Values
RESISTANCE (R) WIRE GAUGE
4 16
6 18
10 20
15 22
13 24 (Double-CAT 5)
NOTE: All Cresnet wiring must consist of two twisted-pairs. One twisted pair is the
+24V conductor and the GND conductor and the other twisted pair is the Y
conductor and the Z conductor.
NOTE: When daisy-chaining Cresnet units, always twist the ends of the incoming
wire and outgoing wire which share a pin on the network connector. After twisting
the ends, tin the twisted connection with solder. Apply solder only to the ends of the
twisted wires. Avoid tinning too far up the wires or the end becomes brittle. After
tinning the twisted ends, insert the tinned connection into the Cresnet connector and
tighten the retaining screw. Repeat the procedure for the other three conductors.
Preparation for Use
Refer to the hookup diagram on the next page which shows ST-TUNE connections.
Other than making the power connection last, complete the connections in any order.
NOTE: Refer to the latest revision of the Crestron Network Modular Cable
Requirements (Doc. 5682) when making connections to the ports labeled NET. This
document can be obtained from the Products page (PRODUCT MANUALS,
Software and Wiring Diagrams section) or Downloads page (CABLES and
MANUAL Libraries, search for MODULAR.PDF) of Crestron’s website
(www.crestron.com). New users are required to register to obtain access to the FTP
site.
NOTE: The external power pack and AM antenna are supplied with the ST-TUNE.
All other modular cables, patch cords, or coaxial cables are not provided.