Sigtronics UT-4D, UT-4S, UT-6S, UT-6D Installation And Operating Instructions Manual
Sigtronics UltraSound Tactical Intercom System
UT-4D, UT-4S, UT-6D, and UT-6S
INSTALLATION AND OPERATING INSTRUCTIONS
UT- 4D
UT- 4S
INTRODUCTION
ATTENTION INSTALLER: To assure a trouble free installation,
please read these entire instructions through once before
beginning.
The Sigtronics UltraSound Tactical Intercom System, when used with
Sigtronics noise attenuating headsets provides the tactical transport
crew with clear, hands free, voice activated (VOX) intercom. The
system also allows full radio monitoring at all headset positions as
well as radio transmit capability from selected headsets via PushTo-Talk (PTT) switches.
Applications: The unit is designed for tactical, rescue and mobile
command center vehicles.
Voice Activated Intercom (VOX) feature allows “hands free” communication between headsets connected to the UltraSound unit.
Start speaking and the intercom turns on instantly to relay your
message clearly to the other headsets. Stop talking and it turns o
to reduce background noise.
Up to Four Headset Positions can be connected to the UltraSound
unit models UT-4S and UT-4D. Up to six for models UT-6S and UT-6D.
More headset positions can be achieved by wiring additional jacks in
parallel. Only one headset, however, can be plugged into paralleled
jacks at one time. In the case of the Driver, he plugs his headset into
his jack while driving. He then unplugs and plugs into the Driver’s
Auxiliary jack when he arrives on scene.
igtronics
S
®
Specialists in “SOUND” Management
178 East Arrow Highway, San Dimas, CA 91773 (909) 305-9399
Headphone Output:
UT- 4S/4D UT-6S/6D
The UltraSound system is designed to easily drive six or more 300 to
1000 ohm headsets. Noise attenuating, full cushion headsets, such as
the Sigtronics ST-8, or ST-48 are recommended for best results. The
UltraSound system incorporates an automatic headphone limiting
circuit to eliminate the possibility of painful spurious radio or noise
spikes from getting to the headsets and into your ears.
Universal Radio Interface is designed to accommodate virtually
any type of communication radio. Adjustments for radio receive level
and transmit microphone level are provided to perfectly match the
UltraSound system to your particular radio.
Automatic Sidetone Generation allows everyone on the vehicle
to hear both sides of the radio conversations.
Excellent RF Immunity guarantees clean, clear, radio communications.
Standardized for use with Sigtronics single plug headsets (ie. ST-8,
ST- 48, ST-18).
Model Dierences:
The UT-4S is used in applications requiring up to four persons at
one time on intercom. Two of the four have radio transmit capability. The UT-4S is designed for use with a single vehicle radio. The
UT-4D is identical to the UT-4S but can accommodate two separate
vehicle radios.
The UT-6S is for single radio operations and can intercom up to six
people at one time. Three of the six can transmit on the vehicle
radio. Similarly, the UT-6D is just like the UT-6S, but with dual radio
capability.
CONTROL FUNCTIONS
VOLUME — Intercom Volume: Adjusts intercom volume level. Does
not aect radio volume.
SQUELCH — Intercom Squelch: Adjusts VOX operation of the intercom for variations in background noise levels.
Intercom Mounting Bracket .............................. 1 ..................... 1
Headset Jack Box and Cover
with Pre-mounted Headset Jack ..................... 4 ..................... 6
with Pre-mounted Headset Jack
and Splash Cover .................................................. 1 ...................... 1
PTT Switch Pre mounted
in PTT Box and Cover .......................................... 3 ..................... 3
Headset Hooks ...................................................... 4 ..................... 6
Jack Box Cover Screws ....................................... 16 .................. 20
Jack Box and Bracket Mounting Screws ...... 28 .................. 36
Wire Grommets ..................................................... 8 .................... 10
Jack Insulator Washer, Flat ................................. 5 ..................... 7
Jack Insulator Washer, Shoulder ...................... 5 ..................... 7
4 ft. Headset Jack and PTT Switch Cable ..... 1 ..................... 1
4 ft. Radio 1 Interface Cable .............................. 1 ..................... 1
4 conductor hook-up wire (Roll) ..................... 1 ..................... 1
4 ft. Radio 2 Interface Cable ............................. 1* .................... 1*
* Supplied with UT-4D and UT-6D (dual radio) units only.
Installation Overview:
Sigtronics has simplied the installation process, to assure perfect
operation. Refer to the UltraSound Wiring Diagram. For UT-4S or
UT-6S see Figure 4; for UT-4D or UT-6D see Figure 5. If you have
any installation questions or problems that are not addressed in this
manual, feel free to call our installation hot line number located on
the last page of this manual.
Installation of the Sigtronics UltraSound System is a four step process:
I. Mount the intercom unit.
(INTERCOM CHASSIS INSTALLATION)
II. Install the headset jacks and PTT switches.
(HEADSET JACK AND PTT SWITCH INSTALLATION)
RADIO 1/RADIO 2 (TALK) — Transmit Select (UT-4D and UT-6D
units only): Used to select which radio to talk on – Radio 1 or Radio 2.
AUTO/BOTH (LISTEN) — Receive Select (UT-4D and UT-6D units
only): Used to select which radio is heard. In “BOTH” position, you
hear both Radio 1 and the Radio 2. In “AUTO” position, only the
radio selected by the RADIO 1/RADIO 2 switch is heard.
RADIO MIC TRANSMIT GAIN — Located on the back of the unit:
Sets the transmit mic audio level for the radio(s).
RADIO VOLUME — Located on the back of the unit: Sets the range
of receive audio from the radio(s).
ULTRASOUND INSTALLATION
Standard Equipment Included
Besides the Intercom unit, each UltraSound system comes complete
with the following:
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III. Wire the jacks and PTT switches.
(HEADSET JACK AND PTT SWITCH WIRING)
IV. Wire the radio(s).
(RADIO HOOK UP)
I. INTERCOM CHASSIS INSTALLATION
Intercom Placement:
There are a few factors to consider when selecting a mounting
location for the UltraSound Intercom chassis:
1. The unit should be placed in such a way that the controls on the
front of the unit can be easily seen and operated. Most commonly,
this will be near the vehicle’s communication radio controls.
2. The Intercom unit is primarily designed to be dash mounted. It
can be mounted on top of the dash or hang below the dash or
vehicle ceiling. The mounting bracket is adjustable to allow for
various mounting angles.
FIGURE 1
UltraSound
SQUELCH
INTERCOM
SEE TEXT
3. The location selected requires a minimum area of 2 ⁄ inches
high by 7 ⁄ inches wide by 4 inches deep. Verif y that the intercom
unit and cables will not interfere with the normal operation of
any vehicle controls or the operation of vehicle compartment
doors.
Mounting Intercom Unit: See Figures 1 and 8
1. Once the location is selected, remove the mounting bracket
from the intercom unit by unscrewing the two large knobs. Be
careful not to lose any of the four ratchet washers.
2. Set the mounting bracket in the selected area and mount with
four of the hex head self drilling screws. For most applications*
these screws can be installed with no pre drilling. Just power in
the screws with a standard electric driver with a ⁄ inch hex bit.
* No pre drilling required for aluminum a nd steel. A ⁄ inch pilot hole
will still be required with some stainless steels.
3. Place the intercom back into the bracket and replace the four
washers and two knobs. Set the Intercom to the desired angle
before tightening down the knobs.
II. HEADSET JACK AND PTT SWITCH INSTALLATION
VOLUME
4. Verify that the jack placement and headset cable do not interfere
with the normal operation of vehicle doors or compartments.
5. In vehicles with intercom headset positions installed in open
crew positions, the combination of wind, road, and engine noise,
picked up by these crew position headsets, can in some cases
produce excessive background noise in the intercom system.
Additionally, wide variations in engine noise (from idle to high
RPM) can falsely trigger the intercom VOX (voice activated)
feature. There are two solutions for this situation. The rst one
is the recommended one:
a) Order an additional Push-To-Talk (PTT) switch (and mount-
ing box if needed) for each open crew seat position. These
switches can be conveniently mounted at each crew seat
location and wired so that the crew seat headset microphone
is disabled until the switch is pressed. See Figure 2 below. The
user then presses his PT T button to talk on the intercom. PTT
buttons wired in this way only activate the intercom. They do
not let the crew seat locations talk on the vehicle radio(s).
b) Order Sigtronics headsets (Models ST-8P, ST-48P, or ST-18P)
with the intercom PTT switch already mounted on the ear cup
for the open crew seat positions. The user then presses the
PTT button on his headset ear cup to talk on the intercom.
The advantage of this method is that it eliminates having to
mount and wire in additional PTT buttons for the open crew
seats. Note, however, most departments prefer to have all
the headsets on the vehicle(s) the same so that any headset
can be used in any position. The headsets with intercom PTT
switches on them cannot easily be used in a position that
has radio transmit capability such as the Driver or Passenger
position.
FIGURE 2
TAN
INTERCOM PTT SWITCH
OPEN CREW SEAT WIRING DIAGRAM
TIPRING
BARREL
HEADSET JACK
BLUE
BLACK
Headset Jack Placement:
It is assumed that it has already been determined which positions
on the vehicle will have headsets. At this stage, it is helpful to have
a headset handy to physically gauge the best place for a particular
jack. There are several things to consider when selecting a place to
mount the headset jacks:
1. In general, for headset positions inside the vehicle, the jacks
should be placed towards the middle between the user’s positions. They should also be placed up above and towards the back
of the user’s head. This will assure that the headset cord will not
hang between the user and the vehicle door.
2. The headset jack should be out of the way so that the headset
plug can’t be hit during use or when entering or exiting the
vehicle.
3. The jack position should also take into account how the headset
cord will hang when the headset is in use. The cord should hang
out of the way and should not interfere with vehicle controls.
www.Si gtronicS.co m Sigtronic S UltraSoUnd Ut-4 and U t-6 intercom S Page 3
Sigtronics provides two ways to mount the headset jacks for the
UltraSound unit:
1. Mount the jacks in the supplied blue jack boxes.
Advantages:
a) Little or no “behind the panel” space required.
b) No vehicle panel thickness limitation.
c) No large holes are required to be drilled - a real advantage
on vehicles with thick metal panels.
d) Complete electrical isolation of the jacks from the vehicles
chassis, because the jack box is fabricated out of non conductive high impact plastic.
2. Mount the jacks directly on the vehicle with a “through the panel”
mounting scheme. Advantages:
a) Smaller space requirement. (Only slightly larger than the jack
itself).
b) Only one hole to drill per jack ( ⁄ inch).
c) Most of jack is behind panel and out of the way.
Sigtronics recommends that you use the jack box mounting method,
but either approach can be used as well as a combination of both.
If required, additional headset jacks, PTT switches, mounting boxes,
and hardware are available through your Sigtronics dealer.
Splash Cover:
If a jack is to be mounted outside the vehicle, a splash cover should
be used to keep excess moisture out of the jack when it is not in use.
Every UltraSound system comes with one such splash cover already
pre-mounted on a jack in a mounting box. On other positions, where
the headset is always plugged in, a splash cover is not required.
Jack Box Mounting:
Set the jack box on the mounting surface in the selected area and
mount with two of the hex head self drilling screws. For most applications* these screws can be installed with no pre drilling. Just power
in the screws with a standard electric driver with a ⁄ inch hex bit.
* No pre drilling required for aluminum and steel. A ⁄ inch pilot hole
will still be required with some stainless steels.
For most installations the wiring for the headset jack will come out
the back of the jack box. A hole is already provided in the jack box
for this purpose. Of course, you will also have to drill a similar hole
into the vehicle. Use a ⁄ inch drill for this.
Alternately, the wire can come out of the side of the jack box if
desired. You will have to drill the hole where required. Use a ⁄
inch drill. Rubber wire grommets are provided for the wire going
through the jack box hole.
Through the Panel Mounting:
For direct mounting of headset jacks on the vehicle panel you will
need to remove the jack from the jack box cover with a ⁄ inch
wrench. For normal jack mounting (no splash cover), the maximum
panel thickness is 0.10 inches or a little less than ⁄ of an inch. If you
need the splash cover (optional), the maximum panel thickness is
0.062 inches or ⁄ of an inch. NOTE: Longer headset jacks that can
accommodate thicker panels are available from your Sigtronics
dealer (order part number 100418 - maximum panel thickness 0.155
inches with splash cover and 0.195 inches without).
FIGURE 3
SHOULDER
INSULATING
WASH ER
TIP
BARREL
RING
HEADSET JACK
FL AT
INSULATING
WASH ER
VEHICLE
PAN EL
FL AT
ME TAL
WASH ER
NUT – OR – SPLASH COVER AN D NUT
PTT Switch Installation:
In order for the Driver or Passenger positions to transmit on the
radio, they will each need a Push-To-Talk (PTT) switch.
The PTT switches should be placed within easy reach of the users. It is
also helpful if they can be easily seen by the users. The PTT switches
can be mounted in the blue ptt mounting boxes or directly into a
panel. If using the ptt boxes, set the box on the mounting sur face in
the selected area and mount with two of the hex head self drilling
screws. For most applications* these screws can be installed with no
pre drilling. Just power in the screws with a standard electric driver
with a ⁄ inch hex bit. * No pre drilling required for aluminum and
steel. A ⁄ inch pilot hole will still be required with some stainless steels.
If mounting the PTT switches directly into a panel the switch is
mounted from the front and the panel can have a maximum thickness of ⁄ of an inch.
In the selected spot, drill a ⁄ inch hole. Mount the switch into the
hole but only loosely install the provided lock washer and nut from
the back. The PTT switch will likely have to be removed to connect
the wires later. The nut requires a ⁄ inch wrench
III. HEADSET JACK AND PTT SWITCH WIRING
The wiring of the headset jacks and PTTs is straight forward. In
general, the 4 foot Headset Jack and PTT Switch Cable gets wired
to the four conductor Hook-up Wire (gray) and then the Hook-up
wire connects to the jacks and the PTT switches. For the UT-4S
and UT-4D models, this cable has a 12 pin connector with 10 wires.
For the UT-6S and UT-6D, there is a 15 pin connector and 13 wires.
Before going on, plug in J1 of the cable into P1 on the Intercom unit.
Flexible four conductor hook-up wire is provided with each system
to connect each headset jack and PTT switch to the UltraSound unit ’s
Headset Jack and PTT Switch Cable. Enough wire is provided for a
typical vehicle installation. If required, additional hook-up wire can
be purchased through your Sigtronics dealer.
Mounting on the panel requires that you insert the jack from the back
of the panel. Test jack(s) for clearance and t. Leave room behind the jack expands when headset plug is inserted. Make sure the back
of the jack does not interfere with any moving parts of the vehicle.
Drill a ⁄ inch hole in the panel. Install jack with mounting washers
and nut as in Figure 3. Both jack insulating washers must be used.
The Jacks have to be insulated from mounting spot to minimize
electrical noise getting into intercom system. No need to tighten
the jack now. You may have to remove the jack to connect the wires.
Page 4 Sigtron icS UltraSoUnd U t-4 and Ut-6 inte rcomS www.Si gtronicS.co m
Each headset jack requires three wires. Each PTT switch requires
two. If the Passenger PTT switch and headset jack are mounted
near each other, only four wires are needed.
Refer to the UltraSound Wiring Diagram for the exact wiring information. Figure 4 for UT-4S and UT-6S intercoms. Figure 5 for U T-4D
and UT-6D intercoms.
The connections between the Headset Jack and PTT Switch Cable
and the hook-up wire should be soldered and insulated for reliability.
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