Firecom 3000a Administrator Guide

A Division of Sonetics Corporation

3000A

Fire Apparatus

Intercom System

INSTALLATION &

OPERATOR'S

ANUAL

Rev.3

3000A

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

Intercom 3000A shown with

optional Dual Radio Interface

Optional “Behind-the-Helmet” Headset

CO PONENT IDENTIFICATION ..................................................... 1

SYSTE DESCRIPTION ................................................................. 2

PRE-INSTALLATION ........................................................................ 2

Determine System ounting Locations

INSTALLATION

odular Cables ......................................................................... 3

Interface Connections ............................................................... 3

Intercom Unit ............................................................................ 3

Headset odule/H -1 .............................................................. 5

TYPICAL CONFIGURATION ............................................................ 4

OPERATION

Headsets .................................................................................. 5

Headset Adjustments................................................................ 5

Headset Volume ....................................................................... 6

Intercom Unit ............................................................................ 6

Digital essage Recorder (D RT ) .......................................... 6

SYSTE SETUP & TEST ................................................................ 6

TROUBLESHOOTING ..................................................................... 7

TECHNICAL DATA

Installation Requirements ......................................................... 8

Alternator Whine and other Distracting Noises ......................... 9

Technical Notes ........................................................................ 9

SPECIFICATIONS ...........................................................................10

Warranty ..................................................................................10

OPTIONS and ACCESSORIES....................................................... 11

EXTENDED TROUBLESHOOTING ................................................12

The information in this document is subject to change without notice.

No part of this document may be copied or reproduced in any form without

prior written consent of Sonetics Corporation.

Sonetics Corporation

7340 SW Durham Rd. • Portland, Oregon 97224

1-800/527-0555 • 503/684-6647

www.firecom.com

[email protected]

Please Read this Manual CompletelyPlease Read this Manual Completely

Please Read this Manual Completely

Before Starting nstallationBefore Starting nstallation

Before Starting nstallation

3000A

odular Cable and Plug

Headset odule showing headset modular

cable input from intercom

Radio Transmit Headset showing red

radio transmit button

at top of ear dome. Jumpseat showing black

intercom transmit button

at top of ear dome

COMPONENT COMPONENT

COMPONENT dentificationdentification

dentificationdentification

dentification

3000A

OVEROVER

OVERV EWV EW

V EWV EW

V EW

The FIRECO system is designed specifically for Fire

Apparatus use. It improves voice communications be-

tween apparatus personnel and provides hearing pro-

tection from high noise levels. It also augments normal

radio communications by interfacing directly to the ap-

paratus radio(s). Six headset connections are provided,

and three have radio transmit capabilities.

NSTNST

NSTALLAALLA

ALLAALLA

ALLAT ON OF TH S SYSTEM S MODULAR!T ON OF TH S SYSTEM S MODULAR!

T ON OF TH S SYSTEM S MODULAR!T ON OF TH S SYSTEM S MODULAR!

T ON OF TH S SYSTEM S MODULAR!

NO wire tangles...NO soldering..EASY to followNO wire tangles...NO soldering..EASY to follow

NO wire tangles...NO soldering..EASY to follow

step-by-step instructionsstep-by-step instructions

step-by-step instructions

VO CE VO CE

VO CE ACT VACT V

ACT VACT V

ACT VAA

ATED with Noise CancellationTED with Noise Cancellation

TED with Noise CancellationTED with Noise Cancellation

TED with Noise Cancellation

The Intercom 3000A includes a state-of-the-art squelch

circuit which cancels background noise until you speak.

This circuit quickly activates to include the first spoken

syllable. In addition, the audio signal is processed to

reduce wind, siren, horn, and engine noise. ic muffs

are included with headsets to aid in wind noise reduc-

tion.

COMPCOMP

COMPAA

AT B L TYT B L TY

T B L TYT B L TY

T B L TY

The Intercom 3000A is compatible with all UHF/VHF Fire

service radios, including 24 volt applications.

CONT NUOUS RAD O MON TCONT NUOUS RAD O MON T

CONT NUOUS RAD O MON TOR NGOR NG

OR NGOR NG

OR NG

All personnel on the intercom will hear the radio traffic

regardless of other intercom activity.

NTERCOM CONTROL FUNCT ONSNTERCOM CONTROL FUNCT ONS

NTERCOM CONTROL FUNCT ONS

Squelch:

Adjusts for a wide range of background

noise levels.

Volume Control:

Easily adjusts to varying micro-

phone/headset sensitivities with ample reserve

volume. Volume control does not affect appara-

tus radio volume.

DUAL-RAD O NTERFDUAL-RAD O NTERF

DUAL-RAD O NTERFACEACE

ACEACE

ACE

If you need to interface the intercom to more than one

radio in a vehicle, FIRECO can provide a solution

through our Dual Radio Interface. For more information,

please contact our technical staff at:

1-800/527-0555

Digital Message Recorder Digital Message Recorder

Digital Message Recorder (D RT )

The “Digital essage Recorder”, a one megabit voice

memory card, provides up to 32 seconds of voice re-

cording. You can record radio or intercom communica-

tions and play them back immediately. FIRECO tech-

nology provides you with unlimited instantaneous replays

of incident address, apparatus assignments, and other

critical information.

SYSTEM DESCR PT ONSYSTEM DESCR PT ON

SYSTEM DESCR PT ON

DETERM NE SYSTEM MOUNT NG LOCADETERM NE SYSTEM MOUNT NG LOCA

DETERM NE SYSTEM MOUNT NG LOCAT ONST ONS

T ONST ONS

T ONS

When locating the system installation, consider areas

which will provide ease of operation. (See illustrated

examples of typical installations on page 4.)

CAUT ON CAUT ON

CAUT ON

When mounting the system components, verify that

drilling through surfaces ill not cause damage to

adjacent iring or equipment.

When selecting your intercom unit location, be sure to

leave at least three inches behind it for cable clearance.

The mounting surface should be flat, fixed, and without

excessive vibration. The surfaces should be able to ac-

cept #8 sheet metal screws.

The Intercom 3000A is provided with a mounting bracket

for dashboard, center console, or overhead mounting.

The mounting bracket slots permit limited rotation of the

Intercom Unit.

Behind-the-head or over-the-shoulder mounting of the

headset modules is usually most convenient. Locate a

flat area that permits surface mounting for each module.

It will be useful to mount a hook or hanger nearby for

storage when the headset is not in use.

PRE- NSTPRE- NST

PRE- NSTALLAALLA

ALLAALLA

ALLAT ONT ON

T ONT ON

T ON

3 inches

INTERCOM

UNIT

25-Pin

Connector

Modular

Cables

Intercom Rear Spacing Diagram

TOP VIEW

The FIRECO Digital

essage Recorder

Board is a solid-state

device with no moving

parts.

3000A

If you wish to have an uncovered plug-in module near a

pump panel, for example, FIRECO has a waterproof en-

closure available. The modular connectors used in the

system are gold-plated to resist corrosion. The cabling

may be installed on the surface, or you may choose to hide

it behind panels, headliners, door sills, etc. Protect any

cabling run through bulkheads or other sheet metal by use

of grommeted holes to prevent damage to the cables.

Prior to securing the system components in place, verify

the layout for:

• Control accessibility

• Headset storage

• Headset cable reach

• Interconnect cable length

• Ease of installation

Stow any excess cable length behind panels or other out-

of-the-way locations. Additional interconnect cables may

be ordered from FIRECO if needed.

NOTENOTE

NOTE

Headset modules may be daisy-chained to the same

intercom connection, but multiple headsets on one

chain may reduce the received audio. This permits

multiple location use of each intercom channel.

NSTNST

NSTALLAALLA

ALLAALLA

ALLAT ONT ON

T ONT ON

T ON

W W

WARN NGARN NG

ARN NGARN NG

ARN NG

To avoid damage or injury, al ays turn OFF the

apparatus master s itch before orking on circuitry.

MODULAR CABLESMODULAR CABLES

MODULAR CABLES

Cables are fabricated at the factory in set lengths. Do

not cut these cables unless you are familiar with phone

plug crimping techniques and have the proper tools.

Additional cables may be ordered from FIRECO if

needed.

NOTENOTE

NOTE

Read the Pre-Installation section before attempting

installation. All cables should be installed prior to final

placement of other system components. Be sure to have

all system component locations pre-selected and

marked.

Observe that there are three INTERCO /TRANS IT

ports and three INTERCO ONLY ports at the rear of

the Intercom 3000A (see photo). In a typical installation

this would allow the Officer, Engineer/Driver, and Pump

Panel positions to be connected to the INTERCO /

TRANS IT side and the jumpseat positions to the IN-

TERCO ONLY side.

NTERFNTERF

NTERFACE CONNECT ONACE CONNECT ON

ACE CONNECT ONACE CONNECT ON

ACE CONNECT ON

The Intercom 3000A includes a 25-pin connector and

interface cable for connection to the fire apparatus. Con-

nections to power and to the radio are made through this

cable. We recommend that these connections be made

by a qualified radio technician.

NOTENOTE

NOTE

See the section on Technical Information for specific

details on ire and pin locations and assignments

NTERCOM UN TNTERCOM UN T

NTERCOM UN T

After selecting your mounting location, mark where you

want to set the mounting bracket.

NOTENOTE

NOTE

Be sure to observe the location criteria mentioned in

the section on PRE-INSTALLATION.

1. Remove the mounting bracket and set the intercom

unit aside

2. Set the mounting bracket in the place marked and

mark the location for the mounting screw holes.

3. Drill two holes for the #8 sheet metal screws.

4. ount the bracket.

5. Attach the intercom to the mounting bracket and in-

stall all the cables. Be sure to tighten the screws on

the 25-pin interface connector.

Sheet Metal

Screws

Intercom

Bracket

Intercom ounting Bracket

3000A

TYP CAL CONF GURA-TYP CAL CONF GURA-

TYP CAL CONF GURA-

Tailboard

(Apparatus

Backup

Assist)

Pump Panel

Officer

& Driver

Jump

Seat(s)

Dashboard Installation

TOP VIEW OF APPARATUS CAB TOP VIEW OF APPARATUS CAB

Overhead Installation

Pump

Panel

Pump Panel

Driver Officer

Firefighter

Officer

Driver

Headset

Jack Module

Intercom

Firefighter

3000A

HEADSET MODULEHEADSET MODULE

HEADSET MODULE

Note that the modular cables plug into each module on

the side below the label. The connector on the opposite

side is for daisy-chaining. Headset modules may be

daisy-chained to the same intercom connection, but only

one headset may be used at a time on each chain.

Do a final location check to ensure that the headset cable

lengths and mounting clearances are adequate before

securing the modules.

Reminder: Reminder:

Reminder: HM-1 Headset Modules should be placed in

the cab ith the follo ing in mind.

→→

→

Locate the modules close enough to the side window

to enable the driver and engineer to have an unobstructed

view out the windows without putting a strain on the

cables.

→→

→

If possible, locate the modules so that the jacks face

in the direction of exit from the cab. This can prevent

damage if the headset wearer inadvertently forgets to

remove the headset when exiting.

1. ark the desired location of the module mounting

holes.

2. Drill two holes and secure the modules using two #8

sheet metal screws (provided).

3. Plug unused, exposed connections with silicone

sealant to avoid problems from salt air or excessive

moisture.

Headset modules mounted in exposed locations such

as a pump panel should be contained in a water proof

enclosure. Waterproof enclosures containing headset

modules with cables attacked are available from Fire-

com.

Label

Plug Socket

Plug

Cable from

Intercom

Headset

Jacks

Mounting

Hole(2)

Plug Socket for Daisy Chain

Headset odule

TOP VIEW

OPERAOPERA

OPERAT ONT ON

T ONT ON

T ON

JumpseatJumpseat

Jumpseat

Radio TRadio T

Radio Transmitransmit

ransmitransmit

ransmit

Jumpseat Headset:Jumpseat Headset:

Jumpseat Headset: This headset receives both inter-

com and radio communications at all times, but it is not

radio transmit capable. It is typically located at the

jumpseat position. Due to the higher ambient noise level

at this location (engine noise, etc.) it is not voice-acti-

vated. When you wish to speak over the intercom, de-

press and hold the BLACK BLACK

BLACK BLACK

BLACK PTT button.

HEADSET ADJUSTMENTSHEADSET ADJUSTMENTS

HEADSET ADJUSTMENTS

All “FH” headsets have adjustable headbands with slide

mechanisms located at each side above the ear domes.

Adjust for a comfortable fit. If the adjustment slides be-

come loose, gently tighten the self-locking hex nuts. All

“UH” (Under-the-Helmet) headsets have an adjustable

velcro head strap. Adjust either type of headset to posi-

tion the liquid-filled ear seals for best noise reduction and

comfort. Washable cloth covers are provided to absorb

moisture. Replacement covers are available from Fire-

com.

Radio TRadio T

Radio Transmit Headset:ransmit Headset:

ransmit Headset:ransmit Headset:

ransmit Headset: This headset receives both

intercom and radio communications at all times. It is

also hands-free, voice-activated to the intercom. When

you wish to transmit over the radio, simply depress and

hold the RED RED

RED RED

RED Push-To-Talk (PTT) button. This headset

is typically located at the Driver, Officer, and Pump Panel

positions.

HEADSETSHEADSETS

HEADSETS

The FIRECO system offers two types of headsets:

Radio Transmit Headset and Jumpseat Headset. Refer

to photos on page 1. Other optional headsets may also

be supplied.

All headsets must be plugged into a Headset odule for

operation.

3000A

A mic muff on each headset microphone is provided to

help reduce wind noise.

Each headset has two plugs of different size which cor-

respond to the appropriate connectors on the Headset

odule.

HEADSET VOLUMEHEADSET VOLUME

HEADSET VOLUME

Preset each headset volume to the highest setting (full

clockwise). Set the radio volume to a level above the

normal comfortable listening level but at a level which

does not cause distortion. Reset the individual headset

volume for best listening level.

NTERCOM 3000ANTERCOM 3000A

NTERCOM 3000A

Volume: This is a master intercom volume control to all

headsets on the system. Adjust it to match the radio

volume adjusted above.

Squelch: This control is adjusted from the Driver or Of-

ficer position, while wearing a Radio Transmit Headset.

Adjust it with the apparatus engine running, so that “nor-

mal” background noise is present. Start with this control

fully clockwise; then slowly rotate counterclockwise until

the background noise is no longer heard. Do not set this

control any further than necessary. Once set correctly,

additional adjustment should not be required.

NOTENOTE

NOTE

These controls do not affect the radio

squelch control setting.

D G TD G T

D G TALAL

ALAL

AL MESSAGE RECORDER MESSAGE RECORDER

MESSAGE RECORDER MESSAGE RECORDER

MESSAGE RECORDER (D RT )

To record, set the toggle switch to RECORD, and press

the START button. The red LED confirms you are set to

the recording mode. The yellow LED indicates the D RT

has been started. To make a new recording, switch to

PLAY and back to RECORD, and press the START but-

ton. A new recording replaces any previous one. To

stop recording before the 32 second time limit is reached,

simply set the toggle switch to PLAY.

1/8"

from mouth

MPORTMPORT

MPORTANT NOTE!ANT NOTE!

ANT NOTE!ANT NOTE!

ANT NOTE!

This is a Noise-cancelling MicrophoneNoise-cancelling Microphone

Noise-cancelling MicrophoneNoise-cancelling Microphone

Noise-cancelling Microphone. It compares

outside noise level to voice level. To operate properly,

it must be positioned at the corner of your mouth and

no more than 1/8 inch from your lips.no more than 1/8 inch from your lips.

no more than 1/8 inch from your lips.

To playback, set the toggle switch to PLAY, and press

the START button. The recording will be replayed each

time you press the START button, as many times as de-

sired. To stop the playback before the message is com-

pleted, set the toggle switch to RECORD and quickly back

to PLAY again. The message will not be erased unless

the START button is pressed while in the RECORD mode.

Disconnecting power will erase the recording.

The D RT may be left idle and ready in either RECORD

or PLAY mode.

The Intercom 3000A radio transmit level has been pre-

set to a nominal level at the factory. In most installations,

satisfactory performance is obtained without having to

re-adjust this level. However, if it is necessary, optimal

RF carrier modulation level may be set by adjusting the

“Transmit Level Adjustment” potentiometer. This control

is located on the interface circuit board of the System

3000A Intercom and can be accessed by removing the

top metal case of the System 3000A Intercom. See in-

terface Circuit Board layout below.

This adjustment should be performed by a qualified ra-

dio technician with access to a suitable RF communica-

tions test set.

Power OnPower On

Power On

1. Turn on the Intercom 3000A at the apparatus mas-

ter switch

2. Confirm that power is applied to the system by plac-

ing the RECORD/PLAY switch to RECORD and

observing that the red LED illuminates.

3. Install a Radio Transmit Headset at the Officer’s or

Driver’s H -1 position.

Adjust headset(s)Adjust headset(s)

Adjust headset(s)

4. Adjust the headset headband for a comfortable fit.

Intercom 3000A

Internal Circuit Board

Transmit Level Adjust

Intercom 3000A Interface Circuit Board Layout

SYSTEM SETUP & TESTSYSTEM SETUP & TEST

SYSTEM SETUP & TEST

3000A

5. Adjust the microphone boom to place the micro-

phone at the corner of your mouth and approximately

1/8” from your lips.

6. Speak into the microphone to confirm intercom op-

eration. You should hear yourself through the head-

set.

Adjust VAdjust V

Adjust Volumeolume

olumeolume

olume

7. Preset the headset volume and the Intercom Unit

squelch controls fully clockwise.

8. Adjust intercom volume for a comfortable listening

level.

9. Test radio communications by pressing the Push-

To-Talk button on your headset and speaking into

the microphone. Adjust your headset volume con-

trol for best listening volume while monitoring radio

traffic.

Test Digital Message Recorderest Digital Message Recorder

est Digital Message Recorderest Digital Message Recorder

est Digital Message Recorder

10. With the RECORD/PLAY switch in RECORD (red

LED on), press the START button (yellow LED on)

and speak into the microphone. Stop the recording

by placing the RECORD/PLAY switch to PLAY. Press

the START button and listen for a recording of what

you just said/

Repeat at Other StationsRepeat at Other Stations

Repeat at Other Stations

11. Check the intercom and radio functions at each In-

tercom/Transmit station as above.

12. Connect a Jumpseat Headset at an intercom only

station.

13. Adjust the headset for a comfortable fit and micro-

phone position.

14. Press the Push-To-Talk button and verify intercom

operation by listening to your own voice.

15. Test the intercom function at each intercom only sta-

tion.

System Dynamic TSystem Dynamic T

System Dynamic Testest

estest

est

16. Start the apparatus engine.

17. At an Intercom/Transmit station, located close to the

Intercom Unit, check the operation of the intercom

and radio functions.

NOTENOTE

NOTE

If static or noise is present on the circuit, it may be due

to improper grounding.

(See the Technical Data section)

18. With the radio volume adjusted to the desired level,

adjust your headset volume for best listening level.

19. Adjust the intercom Volume for best level in the in-

tercom mode while speaking into the microphone.

TROUBLESHOOT NGTROUBLESHOOT NG

TROUBLESHOOT NG

20. Adjust the intercom Squelch Control counterclock-

wise just until the engine noise cannot be heard. Do

not over-adjust, or you may not be able to hear the

normal intercom traffic.

Final adjustment of these controls will be required under

actual apparatus operating conditions.

f Unit Doesn’t Wf Unit Doesn’t W

f Unit Doesn’t Work as Expected:ork as Expected:

ork as Expected:ork as Expected:

ork as Expected:

√√

√Check that apparatus master switch is on.

√√

√Check fuse or circuit breaker

√√

√Check system wiring and interconnections

√√

√Check that the headphones are plugged in all the

way

√√

√Check intercom and headset control settings

√√

√Check for corrosion on headset plugs

√√

√Check that the headsets are plugged into the cor-

rect headset modules. A Radio Transmit Head-

set must be plugged into an Intercom/Transmit

headset location in order to transmit. A Jumpseat

Headset will not transmit under any circumstances

and is designed to be plugged into an Intercom

Only location.

Excessive Static or Noise:Excessive Static or Noise:

Excessive Static or Noise:

→→

→See the section on Technical Data.

TROUBLESHOOT NG?TROUBLESHOOT NG?

TROUBLESHOOT NG?

If you have a problem or just a question,

call our Technical Support Staff

1-800/527-05551-800/527-0555

1-800/527-0555

3000A

TECHN CALTECHN CAL

TECHN CAL DA DA

DA DA

DATT

TAA

NSTNST

NSTALLAALLA

ALLAALLA

ALLAT ON REQU REMENTS:T ON REQU REMENTS:

T ON REQU REMENTS:T ON REQU REMENTS:

T ON REQU REMENTS:

The FIRECO System uses only seven wires for total apparatus/radio connection. The signals required are: ic HI,

Spkr HI, Spkr LO, Radio PTT, Radio PTT Ref, Power, and GND. These signals provide easy connection to a wide variety

of apparatus radios whose input and output circuits are referenced to ground (or other system reference via A-). See

Functional Block Diagram belo .

Connector Pin # Wire Color System Function System Connection

10 Orange Radio PTT Ref. Connect to radio PTT Ref

8 Black Transmitter Key Connect to radio PTT input

17 White Transmit Audio Connect to radio ic HI

21 Green Receive Audio Connect to Radio Speaker HI

13 Blue Receive Audio Connect to Radio Speaker LO

20 Red Power Supply Connect to switched and fused +12V to + 24VDC

Use 1/2 amp fast blow fuse (See System Specifications)

1 Shield System GND Connect this wire to radio signal GND

to minimize E I/RFI problems.

Wires & Connections ires & Connections

ires & Connections ires & Connections

ires & Connections Are dentified Are dentified

Are dentified Are dentified

Are dentified As Follows:As Follows:

As Follows:As Follows:

As Follows:

PTT

Squelch Volume

TX Audio

Adjust

PTT1

A+

A-

HEADSET PTT

PTT REF (10)

PTT TO RADIO (8)

TX HEADSET IC

TX AUDIO HI (17)

(1) SIGNAL GROUND

(20) 12-24 VDC

HEADSET AUDIO

(21) SPEAKER HI

(FRO RADIO)

(13) SPEAKER LO

(FRO RADIO)

Functional Block Diagram: Intercom 3000A

3000A

TECHN CALTECHN CAL

TECHN CAL DA DA

DA DA

DATT

TA-A-

A-A-

A-

cont.cont.

cont.

ALAL

ALTERNATERNA

TERNATERNA

TERNATT

TOR WH NEOR WH NE

OR WH NEOR WH NE

OR WH NE

AND OTHER D STRACT NG NO SESAND OTHER D STRACT NG NO SES

AND OTHER D STRACT NG NO SES

Because of the level of ambient noise present with the

apparatus motor running, alternator whine and other

noises may not be noticed in the communications sys-

tems until an intercom is added. A noisy system will al-

ways be apparent, however, once an intercom is installed.

Alternator whine and other noises on the communica-

tions circuit are due to two main causes:

→→

→Improper installation.

→→

→A faulty alternator.

Generally, the problem is not caused by the alternator. It

is usually the result of a difference in signal potential be-

tween the apparatus radio signal ground and the inter-

com signal ground. Additional sources may also exist in

the apparatus electrical system

To reduce or eliminate alternator whine, performo reduce or eliminate alternator whine, perform

o reduce or eliminate alternator whine, performo reduce or eliminate alternator whine, perform

o reduce or eliminate alternator whine, perform

the following:the following:

the following:

❑Connect the apparatus radio to the cleanest power

source possible; a source without motors (e.g., heat-

ers, windshield wipers, etc.), sirens, strobes, or flash-

ers.

❑Use the same precautions when connecting the in-

tercom power.

❑Ensure that all radio power and ground connections

are clean and tight.

❑Ensure that the radio power and ground wires are of

sufficient gauge to prevent a signal developing

across them.

❑Keep all battery connections clean and free from

dirt and corrosion.

❑Use noise filters on radio and intercom power if

needed.

TECHN CALTECHN CAL

TECHN CAL

ASS STASS ST

ASS STANCEANCE

ANCEANCE

ANCE

Our technical staff is just a phone call away. Contact us

at 1-800/527-0555.

TECHNICAL NOTES:

3000A

SPEC F CASPEC F CA

SPEC F CAT ONST ONS

T ONST ONS

T ONS

INTERCO

Size ..................... 7-3/8”L x 6-1/2”W x 2-3/8”H with mounting bracket

Weight .......................................................................................... 48 oz

Output ............................................... 375 milliwatts into each of up to

...................................... six 150 ohm headsets. Sound level remains

............... constant regardless of the number of headsets connected.

Power Requirements ........................ .016 amps, 12-24 VDC external

Fuse ......................................................... 1/2 amp fast blow type 3AG

HEADSET/All FH- and UH- models

Sensitivity .............. 104 dB re .0002 microbar @ 1000 Hz 1 mW

Frequency Response .......... 150-5,000 Hz + 5 dB in 6cc coupler

Impedance ............ 600 ohms nominal, 150 to 1200 ohm source

Weight ..................................................................................19 oz

Shielding ........................ Full floating shield w/independent gnd.

Noise Reduction Rating ...................................................... 24 dB

ICROPHONE/Part No: A-7A

DC Bias Supply ..................... 8 to 16 volts, not polarity sensitive

Source Resistance .......................................... 220 to 2200 ohms

Output Voltage ............ 370 mV @ 114 dB spl re .0002 microbar

Frequency Response ...................... Optimized for speech clarity

and noise reduction

ax. Amb. Noise Level ................. 125 dB spl re .0002 microbar

Weight ..................................................................................02 oz

NOISE REDUCTION DATA

125 250 500 1000 2000 3000 4000 6300 8000

EAN ATTENUATION IN dB 19.3 24.7 32.7 37.2 31.3 35.3 37.5 33.9 32.3

EAN DEVIATION IN dB 3.1 4.1 3.5 2.5 2.9 3.6 3.7 3.7 4.4

NRR = 24 Use this laboratory-derived data for comparison only. The amount of protection afforded in field

use is often significantly lower depending on how the headset is fitted and worn.

One-YOne-Y

One-Year Limited Wear Limited W

ear Limited Wear Limited W

ear Limited Warranty to Original Purchaserarranty to Original Purchaser

arranty to Original Purchaserarranty to Original Purchaser

arranty to Original Purchaser

Sonetics Corporation warrants to the original purchaser of its products, that they will be free from defects in materials and

workmanship, under normal and proper use, for the period of one year from date of purchase. Sonetics Corporation will repair

or replace, at its option, any parts showing factory defects during this warranty period, subject to the following provisions. This

warranty applies only to a new product which has been sold through authorized channels of distribution. All work under warranty

must be performed by Sonetics Corporation. All returned products must be shipped to our address, freight prepaid, accompa-

nied by a dated proof of purchase. The purchaser voids this warranty if he or others attempt to repair, service or alter the product

in any way. This warranty does not apply in the event of accident, abuse, improper installation, unauthorized repair, tampering,

modification, fire, flood, collision, or other damage from external sources, including damage which is caused by user replaceable

parts (leaking batteries, etc.). This warranty does not extend to any other equipment or apparatus to which this product may be

attached or connected. The foregoing is your sole remedy for failure in service or defects. Sonetics Corporation shall not be

liable under this or any implied warranty for incidental or consequential damages, nor for any installation or removal costs or

other service fees. This warranty is in lieu of all other warranties, express or implied, including the warranty of merchantability or

fitness of use, which are hereby excluded. To the extent that this exclusion is not legally enforceable, the duration of such implied

warranties shall be limited to one year from date of purchase. No suit for breach of express or implied warranty may be brought

after one year from date of purchase.

3000A

OPT ONS OPT ONS

OPT ONS andand

andand

and ACCESSOR ES ACCESSOR ES

ACCESSOR ES ACCESSOR ES

ACCESSOR ES

Headsets:Headsets:

Headsets:

FH-1:FH-1:

FH-1:

Headset ith Radio Transmit PTT

. A high quality

adjustable headset with 24dB noise reduction, liquid filled

ear seals, adjustable microphone boom, electret micro-

phone and volume control.

FH-2:FH-2:

FH-2:

Intercom Only Headset

. Specially designed for

jump seat positions.

UH-1:UH-1:

UH-1:

Under the Helmet Radio Transmit Headset

. In-

corporates all the features of the standard Radio Trans-

mit Headset/FH-1 Headset, but is specially designed for

wearing under the helmet.

UH-2:UH-2:

UH-2:

Under the Helmet Jumpseat Headset.

Incorpo-

rates all the features of the standard Jumpseat Headset/

FH-2 Headset, but is specially designed for wearing un-

der the helmet.

FH-1S:FH-1S:

FH-1S:

Single Ear Radio Transmit Headset.

Same as

the Radio Transmit Headset/FH-1 except has only one

earphone with an over-the-head band.

FH-2:FH-2:

FH-2:

Single Ear Jumpseat Headset.

Same as the

Jumpseat Headset/FH-2 except has only one earphone

with an over-the-head band.

Headset Modules and AccessoriesHeadset Modules and Accessories

Headset Modules and Accessories

HM-1:HM-1:

HM-1:

Headset Module.

Provides a convenient location

for connecting headsets into the intercom system. Non-

waterproof.

PP-2:PP-2:

PP-2:

Pump Panel Headset Modules, aterproof.

waterproof headset module designed for use in environ-

ments subject to weather and water spray. (Includes an

attached modular cable.)

CA*:CA*:

CA*:

Modular Cable.

Interconnect cables used to pro-

vide signal paths between a headset module and the In-

tercom Unit. Standard lengths include 6, 12, and 20 feet.

They may also be custom ordered to any length.

(* insert cable length in place of *.)

HE-15:HE-15:

HE-15:

Headset Extension, 15 foot coiled cord.

A coiled

cord providing extended length between the headset

module and the headset.

FS-1:FS-1:

FS-1:

Heavy Duty PTT Foot S itch.

Used when

handsfree transmit capability is desired.

HH-Series:HH-Series:

HH-Series:

Hand-held Radio-to-headset Interface.

Check for availability of radio model interface.

Consumable and Replacement temsConsumable and Replacement tems

Consumable and Replacement tems

CC-1:CC-1:

CC-1:

Cloth Comfort Covers.

Cloth covers with elastic

bands which slip over the headphone ear seals provid-

ing comfort and hygiene for the wearer.

MM-1:MM-1:

MM-1:

Microphone Muff.

A foam muff used over the

microphone providing wind noise reduction.

A-7A:A-7A:

A-7A:

Replacement Microphone for all FH and UH se-

ries headsets.

3000A

EXTENDED TROUBLESHOOT NGEXTENDED TROUBLESHOOT NG

EXTENDED TROUBLESHOOT NG

f Things Go Wf Things Go W

f Things Go Wrongrong

rongrong

rong

The FIRECO Apparatus Intercom System, when in-

stalled properly and adjusted according to specifications,

will perform to industry standards and offer you the finest

in hearing protection and enhanced communication.

However, occasionally you might experience a malfunc-

tion.

The following recommendations cover potential trouble

areas.

Find the symptom which you are experiencing and fol-

low the trouble-shoot steps in the sequence given.

If the symptoms you are experiencing are not covered in

this document, call the FIRECO Customer Service

Department at 1-800-527-0555.

Definitions:Definitions:

Definitions:

Intercom unit 3000A Intercom with or without

the D R.

Radio Interface Port 25 pin d sub jack on the rear of

the intercom unit.

Radio Interface Cable Cable which mates with the ra-

dio interface port.

Intercom Port Any one of six modular jacks on

the rear of the intercom unit.

Intercom/Tx Port One of the three intercom ports

capable of keying and transmit-

ting over the apparatus radio

through the Radio Interface

Port.

H -1 Black plastic module with a

speaker jack and a smaller mi-

crophone jack used to connect

headsets into the intercom sys-

tem

PP-2 A mic jack and a speaker jack

in a water resistant enclosure.

CA Cable Flat six conductor cable with six-

wide modular plugs on each end

used to make connections be-

tween H -1’s or PP-2’s and the

intercom unit

Headset Location Any combination of “CA” cables

and H -1’s or PP-2’s con-

nected to a single port on the

rear of the intercom unit.

How to verify that a headset location has a badHow to verify that a headset location has a bad

How to verify that a headset location has a bad

component and troubleshoot to either a badcomponent and troubleshoot to either a bad

component and troubleshoot to either a bad

headset, bad cable or bad HM-1headset, bad cable or bad HM-1

headset, bad cable or bad HM-1

(A) Examine the headset’s label to determine if the head-

set is a jumpseat type or a radio transmit type head-

set.

1. If the headset is a radio transmit type, the speak-

ers should always be active. The mic should al-

ways be active. Pressing the red PTT button on

the eardome should key the radio only if that head-

set location is plugged into an intercom/tx port,

otherwise the PTT button will have no effect.

2. If the headset is a jumpseat type headset, the

speakers should always be active. The mic should

be active only when the black PTT button on the

eardome is pressed. The headset should never

cause the radio to key once installed in any head-

set location.

(B) Unplug the headset location from the intercom unit

and exchange intercom ports with a known good

headset location. If the headset fails to perform prop-

erly, the headset location has a faulty component

and you should continue troubleshooting the head-

set location

tion. If the headset fails to perform properly in the

new location, the headset is faulty and needs to be

repaired.

(D) If the headset is not at fault, check the H -1 by ex-

changing it with a known good one from another

headset location, and checking for proper operation

of the headset location. Check the modular plug of

the H -1 for bent or stuck pins. If the pins look

good and the H -1 fails to perform properly, it will

need to be replaced.

(E) If the H -1 is not at fault, check the intercom port

the headset location is connected to by plugging a

known good headset location into that port. If the

new headset location operates properly, the cable

of the original headset location is bad and will need

to be replaced. It is possible that the problem with

the cable will be at the modular connector and that a

new one could be crimped on and thus solve the

problem with the headset location. A modular cable

crimping tool is required to attach new modular ends.

3000A

EXTENDED TROUBLESHOOT NGEXTENDED TROUBLESHOOT NG

EXTENDED TROUBLESHOOT NG

Troubleshooting an intercom system that hasroubleshooting an intercom system that has

roubleshooting an intercom system that hasroubleshooting an intercom system that has

roubleshooting an intercom system that has

been working properly but has failedbeen working properly but has failed

been working properly but has failed

(A)(A)

(A) There is no sound in the headset from either in-There is no sound in the headset from either in-

There is no sound in the headset from either in-There is no sound in the headset from either in-

There is no sound in the headset from either in-

tercom or radio.tercom or radio.

tercom or radio.

1. Check the headset location for proper orientation

and replace any faulty components.

2. If the headset location checks good, verify that

power is present at pin 20 and that ground is

present at pin 1 by verifying a voltage of at least

11.5 volts between those two pins. If power is

present the red LED on the intercom faceplate

will light when the toggle switch is in the RECORD

position (the green LED will always light on an

intercom without a D R). If power is not present,

check the wiring to the intercom and any switches,

fuses, or circuit breakers in the power circuits to

the intercom and correct any faults.

3. If there is power to the intercom and it doesn’t

work, the intercom unit is bad. Remove it for re-

pair. Contact F RECOMF RECOM

F RECOMF RECOM

F RECOM

for return authorization.

(B) There is no sound in the headset from the radio, but

the intercom is okay.

1. Verify that the receive audio is present by listen-

ing to the radio’s speaker. If there is no audio

from the radio’s speaker, disconnect the radio in-

terface port connector from the back of the inter-

com unit. If there still is no audio from the radio’s

speaker, the radio or wiring is at fault.

2. If the radio is putting out receive audio, check the

connections to pins 13 and 21 of the intercom.

An open will cause no receive audio.

3. If no wiring fault is found, try swapping the inter-

com unit with a known good one to verify that the

problem is not the wiring. If no fault can be found

in the wiring, then the intercom unit is bad and

should be removed for repair.

(C)(C)

There is no sound in the headset from the inter-There is no sound in the headset from the inter-

There is no sound in the headset from the inter-

com, but the radio is okaycom, but the radio is okay

com, but the radio is okay..

1. Verify that the headset location is good, replace

any faulty headset location components.

2. If the headset location checks good, the fault must

lie in the intercom unit. Remove it for repair.

(D)(D)

(D) There is no sound in one earThere is no sound in one ear

There is no sound in one earThere is no sound in one ear

There is no sound in one ear..

1. The headset is faulty. Remove it for repair.

(E)(E)

(E) YY

You can hear others on the intercom but theyou can hear others on the intercom but they

ou can hear others on the intercom but theyou can hear others on the intercom but they

ou can hear others on the intercom but they

cannot hear you.cannot hear you.

cannot hear you.

1. If the headset is a jumpseat type headset, be sure

that the black PTT button is fully depressed when

trying to talk on the intercom.

2. Verify that the headset location is good. If it ap-

pears that the headset is the faulty component,

check the phillips head set screws on the mic el-

ement for proper tightness before removing the

headset for repair.

(F)(F)

(F) YY

You can’t hear others on the intercom but theyou can’t hear others on the intercom but they

ou can’t hear others on the intercom but theyou can’t hear others on the intercom but they

ou can’t hear others on the intercom but they

can hear you.can hear you.

can hear you.

1. Verify that the headset location is good. Replace

any faulty headset location components.

2. If the headset location checks good, the fault must

lie in the intercom unit. Remove it for repair.

(G)(G)

(G) There is a loud squeal in the intercom systemThere is a loud squeal in the intercom system

There is a loud squeal in the intercom systemThere is a loud squeal in the intercom system

There is a loud squeal in the intercom system

when intercom volume is turned up.when intercom volume is turned up.

when intercom volume is turned up.

1. Check for an open mic too near the speakers of a

headset. Feedback problems are often fixed by

turning the intercom volume down, moving the mic

away from the headset speakers, or unplugging

the smaller jack on the headset’s com-cable when

not in use.

2. If the problem persists, unplug the headset loca-

tions one at a time from the rear of the intercom

unit until the squeal stops. ost likely there is a

short in that location’s cabling. The cable should

be unplugged from both its H -1 and the inter-

com unit and checked for shorts between con-

ductors. If any are found, the cable will need to

be replaced.

(H)(H)

(H) The radio receive is weak.The radio receive is weak.

The radio receive is weak.The radio receive is weak.

The radio receive is weak.

1. Check the setting of the radio’s volume control.

The radio’s volume control is the only adjustment

for receive audio level in the intercom systems.

2. Verify proper connection of radio interface pins

13 and 21.

3. If no fault is found and another intercom unit is

available, try swapping a known good intercom

with the suspect one. If the problem goes away,

the fault is in the suspect intercom unit. Remove

it for repair. If the problem persists, call F RE-F RE-

F RE-F RE-

F RE-

COM COM

COM technical support for assistance.

3000A

( )( )

( ) The radio keys but has no transmitter audio (car-The radio keys but has no transmitter audio (car-

The radio keys but has no transmitter audio (car-The radio keys but has no transmitter audio (car-

The radio keys but has no transmitter audio (car-

rier but no audio).rier but no audio).

rier but no audio).

1. Verify radio interface pin 17 (transmit audio) for

proper connection.

2. If pin 17 is properly connected, verify that the trans-

mit audio adjustment inside the intercom unit is

not set for zero output by setting it to mid-range.

3. If no fault is found and another intercom unit is

available, try swapping a known good intercom

with the suspect one. If the problem goes away,

the fault is in the suspect intercom unit. Remove

it for repair. If the problem persists, call F RE-F RE-

F RE-F RE-

F RE-

COM COM

COM technical support for assistance.

(J)(J)

(J) The radio doesn’t keyThe radio doesn’t key

The radio doesn’t keyThe radio doesn’t key

The radio doesn’t key..

1. Verify that the headset location is good. Replace

any faulty headset location components.

2. If the headset location checks good, verify proper

connection of radio interface pins 8 and 10.

3. If no fault is found and another intercom unit is

available, try swapping a known good intercom

with the suspect one. If the problem goes away,

the fault is in the suspect intercom unit. Remove

it for repair. If the problem persists, call F RE-F RE-

F RE-F RE-

F RE-

COM COM

COM technical support for assistance.

(K)(K)

(K) Alternator and/or strobe noise is present in trans-Alternator and/or strobe noise is present in trans-

Alternator and/or strobe noise is present in trans-Alternator and/or strobe noise is present in trans-

Alternator and/or strobe noise is present in trans-

mit audio onlymit audio only

mit audio only..

1. Verify that radio interface pin 1 is connected to

mic low and all connections are clean and tight.

2. Verify that the intercom transmit audio level ad-

justment is not set too high. Too much gain here

will cause excessive background noise to be

transmitted along with the voice. In the worst case,

the voice will be somewhat distorted when trans-

mitting from a quiet place and will become un-

readable in the presence of background noise.

(L) Alternator and/or strobe noise is present in all(L) Alternator and/or strobe noise is present in all

(L) Alternator and/or strobe noise is present in all

intercom audio.intercom audio.

intercom audio.

1. Review the set up and operation of the intercom

volume and squelch controls. Possibly the inter-

com volume is set too high.

2. Inspect the headset microphones, making sure

that all the slots on both sides of the mic are clean

and unobstructed. Obstruction of these slots will

hamper the noise cancelling characteristics of the

mics.

3. Disconnect any exterior mounted headset loca-

tions. If the noise stops, inspect that location for

water or other contamination is present, contact

F RECOMF RECOM

F RECOM

for return of the unit.

(M)(M)

(M) Engine noise and sirens are present in transmitEngine noise and sirens are present in transmit

Engine noise and sirens are present in transmitEngine noise and sirens are present in transmit

Engine noise and sirens are present in transmit

audio.audio.

audio.

1. Verify that the intercom transmit audio level ad-

justment is not set too high. Too much gain here

will cause excessive background noise to be

transmitted along with the voice. In the worst case,

the voice will be somewhat distorted when trans-

mitting from a quiet place and will become un-

readable in the presence of background noise.

(N)(N)

(N) ntercom volume control has no effect.ntercom volume control has no effect.

ntercom volume control has no effect.ntercom volume control has no effect.

ntercom volume control has no effect.

1. Call F RECOM F RECOM

F RECOM F RECOM

F RECOM technical support for assistance

or return authorization

(O)(O)

(O) ntercom squelch has no effect.ntercom squelch has no effect.

ntercom squelch has no effect.ntercom squelch has no effect.

ntercom squelch has no effect.

1. Call F RECOM F RECOM

F RECOM F RECOM

F RECOM technical support for assistance

or return authorization

(P)(P)

(P) Cannot seem to set the squelch level (squelchCannot seem to set the squelch level (squelch

Cannot seem to set the squelch level (squelchCannot seem to set the squelch level (squelch

Cannot seem to set the squelch level (squelch

is too touchy).is too touchy).

is too touchy).

1. First review the set up and operation of the squelch

control. Note that is important to speak in a loud

clear voice and keep the mic very close to the

speaker’s mouth.

2. Call F RECOM F RECOM

F RECOM F RECOM

F RECOM technical support for assistance

or return authorization

(Q)(Q)

(Q) DMR does not workDMR does not work

DMR does not workDMR does not work

DMR does not work

1. Review proper operation of D R switches

2. Call F RECOM F RECOM

F RECOM F RECOM

F RECOM for return authorization.

(R)(R)

(R) DMR has a noisy playback.DMR has a noisy playback.

DMR has a noisy playback.DMR has a noisy playback.

DMR has a noisy playback.

1. Call F RECOM F RECOM

F RECOM F RECOM

F RECOM for return authorization.

(S)(S)

(S) DMR playback is weak.DMR playback is weak.

DMR playback is weak.DMR playback is weak.

DMR playback is weak.

1. Call F RECOM F RECOM

F RECOM F RECOM

F RECOM for return authorization.

EXTENDED TROUBLESHOOT NGEXTENDED TROUBLESHOOT NG

EXTENDED TROUBLESHOOT NG

3000A

EXTENDED TROUBLESHOOT NGEXTENDED TROUBLESHOOT NG

EXTENDED TROUBLESHOOT NG

Use this section to check out items identifiedUse this section to check out items identified

Use this section to check out items identified

as bad before sending them out for repairas bad before sending them out for repair

as bad before sending them out for repair..

Bad headset:Bad headset:

Bad headset:

Bad mic circuit -

1. Using a #0 phillips screwdriver, check that the set

screws in the mic element are snug.

2. Exchange mic elements with a working headset

to check that the mic element is not bad.

3. If neither of these solves the problem, call for a

return authorization and send the headset in for

repair.

Bad speaker or PTT circuit:Bad speaker or PTT circuit:

Bad speaker or PTT circuit:

1. Send the headset in for repair.

Bad intercom:Bad intercom:

Bad intercom:

1. Check all intercom ports for bent or stuck pins.

Bad HM-1 or PP-2:Bad HM-1 or PP-2:

Bad HM-1 or PP-2:

1. Send H -1 or PP-2 in for repair.

Bad CA CableBad CA Cable

Bad CA Cable

1. If tools are available, try replacing the modular

plug on both ends of the CA cable. Note that

there is one correct way to assemble these cables.

The order of the wire colors must be opposite at

each end.

Sonetics Corporation

7340 SW Durham Rd. • Portland, Oregon 97224

1-800/527-0555 • 503/684-6647

www.firecom.com • [email protected]

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