Service manual

STP 11-25R13-SM-TG
3 - 55
INSTALL AN AUDIO SYSTEM
113-575-1002
Conditions: In a tactical or garrison environment, given an audio console or mixer, source inputs (such
as CD players, AudioVAULT, SADIE, cassette player, reel-to-reel tape recorder, cart players, telephone
interface, microphones, tone DA, FM and AM receivers, other studios, router system, satellite signals, and
remote signals), remote controls, patch panels with patch cables, DAs, ATSG, audio amplifier, speakers,
relay interface, on-air lights, headsets, audio cables and wires, connectors (such as XLR, RCA, mini,
phono, banana, and molex), cable labels, tie wraps, multimeter with test leads, step ladder, electronic
equipment tool kit, soldering tool kit (light to medium duty), third-hand type vise, heat gun, heat-shrink
tubing, rosin-core solder, bench stock, DA Form 2407, output medium (such as STL, transmitter, or fiber
optics), system block diagrams, and manufacturers' manuals.
Standards: The standards are met when the audio system is installed and fully operational with no
problems.
Performance Measures Results
1. Review system layout and block diagrams. P F
2. Install equipment racks. P F
3. Run and connect station earth ground to each rack. P F
4. Rack mount equipment. P F
5. Install AC power to racks. P F
a. Mount AC power cable and strips vertically in rear of racks where possible. P F
b. Designate location of power panel and breaker on the strip. P F
c. Run power cables from the power panel to the equipment or racks through
appropriate conduit.
P F
6. Prepare, install, and connect cables and wiring. P F
a. Dress cables in bundles to the right or left side consistently in all racks. P F
b. Install cables so that they do not restrict installation or removal of equipment
located in the rack; allow ample loop to provide for rail-mounted equipment
removal or service.
P F
c. Where possible, install cable bundles on the opposite side to the power strip
located in the rack. Do not strap signal cables to power or control cables. Allow a
minimum distance of two inches between signal and power cables.
P F
d. Do not allow cables to hang from connectors without proper strain relief; secure
cables to cable hangers or restraints in equipment racks.
P F
e. Tie wrap cable bundles at 6- to 12-inch intervals. P F
NOTE: Do not install tie wraps in cable troughs; separate cables with trough dividers.
f. Do not connect the ground shield to source equipment. At destination equipment,
connect cable shield to signal ground terminals.
P F
g. On patch panels, connect all cable shields to maintain signal ground continuity
through patch panel and cable leading to destination equipment.
P F
h. For equipment requiring 600-ohms load termination, connect a 600-ohm load
resistor across the output.
P F
i. Support rigid transmission lines with spring hangers on vertical runs up a tower
and place suspension hangers in the horizontal runs to accommodate for
expansion and contraction.
P F
7. Label all cables. P F