AEQ AM-03 User manual

A.E.Q., S.A. fabricante de este equipo, es “Empresa Registrada”de acuerdo
con la norma UNE EN-ISO-9001 por AENOR con el nº:ER-080/1/96
AEQ AM-03
Self-powered Stereo Audio Monitor
Monitor Auto-Amplificado de Audio
Estéreo
USER´S MANUAL / MANUAL DE USUARIO
ED. 11/96

INDEX
1. MISCELLANEOUS
1.1. GENERAL PRECAUTIONS
1.1.1. READ ALL THE INSTRUCTIONS
1.1.2. POWER AND GROUND CONNECTIONS
1.1.3. PROTECTION AGAINST VOLTAGE FLUCTUATIONS
1.1.4. WATER AND HUMIDITY
1.1.5. VENTILATION AND AMBIENCE
1.1.6. MAINTENANCE
1.1.7. GUARANTEE
2. POWER REQUIREMENTS
2.1. GENERAL
2.1.1. BEFORE CONNECTING THE EQUIPMENT TO MAINS
2.1.2. VOLTAGE SELECTOR
2.1.3. EQUIPMENT POWER ON
3. AUDIO CONNECTIONS
3.1. GENERAL
3.1.1. AUDIO INPUT CONNECTIONS
4. OPERATING INSTRUCTIONS
4.1. GENERAL
4.2. OPERATING INSTRUCTIONS
4.2.1. GAIN CONTROL
4.2.2. L / R BALANCE SELECTOR
4.2.3. INPUT SELECTION
4.3. AUDIO PHASE METERING
4.3.1. GENERAL
4.3.2. LEFT CHANNEL SIGNAL
4.3.3. RIGHT CHANNEL SIGNAL
4.3.4. STEREO SIGNAL IN PHASE
4.3.5. MONOAURAL SIGNAL IN PHASE
4.3.6. STEREO SIGNAL OUT OF PHASE
4.3.7. MONOAURAL SIGNAL OUT OF PHASE
4.4. MONITORING WITH HEADPHONES
4.4.1. HEADPHONES CONNECTION
5. DESCRIPTION OFAM-03 FRONT AND BACK PANELS
5.1. FRONT PANEL
5.2. BACK PANEL
6. TECHNICAL SPECIFICATIONS
6.1. TECHNICAL SPECIFICATIONS OF AM-03

1. MISCELLANEOUS
1.1. General precautions
The following measures of safety and precaution should be observed during every moment of
operation and maintenance of this equipment. The erroneus handling or ignoring this instructions,
could alter in a serious way the functioning and performance of the equipment.AEQ willnotbeliable
to any injuries or damages incurred by an incorrect handling of the equipment.
1.1.1. Read all instructions
Beforeoperatingthisequipmentandconnectingittoanyexternalpowersource,itisabsolutely
neccesary to thoroughly read all the instructions contained in this manual, and to do so in the
establishedorder.Thisway,youwillgetthebestperformancefromyourequipmentfromtheverystart,
and at the same time, you will avoid any incorrect handling or operation that could result in damage
to the same.
1.1.2.Power and ground connection
Toreducetheelectricalshockrirk,theAM-03mustbeconnectedtoground.Theunitissupplied
withthegroundplugconnector.Ifnecessarytochangetheplug,thegroundcableistheyellow/green
one.
1.1.3. Protection against voltage fluctuation
Onlocationswherepowerfluctuationsare frequent, an external protection device isneededto
guarantee that the voltage required for the unit is the appropiate one.
1.1.4. Water and humidity
Itisstronglyrecomendedtonotusetheequipmentonlocationswherethereexistariskofwater
penetrating in the interior of the equipment, i.e. rain, mist, wet floors, etc. Nor is it recommended to
usetheequipmentonlocationswithanelevatedlevelofatmospherichumidity,whereasthisfrecuently
is condensed inside the equipment.

1.1.6. Maintenance
Themaintenance operationsofthis unitshouldbecarriedoutexclusivelybyqualified technical
service.AEQisnotliabletoanydamagecausedtotheequipmentduetoanymaintenanceoperation
without our authorization, nor to the damage that an equipment repared without such authorization
could inflict to other equipment or persons.
Be aware that this unit contains very high voltages, dangerous presenting the risk of electric
shock. The installation of this unit mus be fullfilled by qualified technical service, just as all internal
manipulation.
1.1.5. Ambience and ventilation
The equipment should never be placed on or near a source of heat. The use of electronic or
electrical devices close to a flame or inflamable gases suposses a danger that should be avoided at
all cost.
All ventilation grids must be un-obstructed to allow the proper circulation and let the termal hot
air out.
1.1.7. Guarantee
Theguaranteevalidityperiodandtheconditionsofsuchguaranteeisspecifiedontheguarantee
card delivered with the equipment.

2. POWER REQUIREMENTS
2.1. General
The description of the front and back panels of the equipment can be found on the Section 5.
Please, unfold the graphic cart to obtain a general view of equipment controls and its connections.
2.1.1. Before connecting the equipment to mains
Caution: Do not connect the equipment before the voltage selection has been checked, and
the appropiate voltage selected (as described in Section 2.1.2.). It is important to carefully follow the
indicated procedures on this section before connecting and turn the equipment on.
2.1.2. Voltage selection
The AM-03 is prepared to operate with voltages between 110V and 220 V. Please, select the
appropiate voltage for your area. If the 110 V AC is selected, it is necessary to replace the fuse
deliveredwiththeequipment(200 mA), with the 400mA, that can be found in the plastic bag in which
thismanualiscontained.Inordertodoso,proceedasfollows:pulloutthefuseboxlocatedunderneath
theunit'smainsconnectorsocket(fig.2),replacetheexistingfusefortheonealreadymentioned.The
fuse box has enough space to keep a spare fuse.
Remember: Voltage at 220 V AC = 200 mA T type
Voltage at 110 V AC = 400 mA1 T type
Note: The equipment is delivered from factory with the voltage selected to 220 V AC, and its
corresponding fuse of 200 mA.
Note: The AM-03 mains cable is delivered with the european normative mains plug. In some
countries, it could be necessary to replace this plug with one that complies with the local standards.
If this could be your case, please, replace the plug before operation.
FIGURE 2FIGURE 1
FUSE

2.1.3. Equipment power on
Oncecheckedandmodified,followingtheinstructionsinSection2.1.2.,theequipmentisready
to be connected to mains. Before connecting it to mains, please, turn the power switch to off (fig. 3).
Now turn the power switch on. If all the instructions have been followed properly, the power on led
will illuminate, and the same will happen with the central led of the led audio phase meter (fig. 4).
The proccess of preparing and connecting the equippment to mains has finished. Turn off the
power of the unit and proceed with the connection of the audio signals as indicated in Section 3.
FIGURE 3 FIGURE 4

3. AUDIO CONNECTIONS
3.1. General
Note: We strongly reccomend that you unfold the graphic description of the equipment, if you
have not already done so, to obtain a better comprehension of the following instructions.
The connectors on the AM-03 has been carried out in accordance to the AES 14 - 1.992
(ANSIS4.48-1.992).ThisreccomendationfollowstheIEC268-12from1.987,Equipmentforaudio
systems, part 12. Connectors for broadcasting and similar uses.
Make sure that the audio cables connected to the equipment follows the indicated normative.
Incasethey donot,they shouldbereplacedor modifiedwhereasproblemscouldariseregardingthe
phase of the audio signal.
Pin connector
(male) Output
Socket connector
(female) Input
Appliance
balanced
mono channel
Unbalanced
mono channel
Balanced
mono channel.
Phantom Power
Balanced
mono channel
Power A-B
1
Shield
Shield and
return
Shield and
negative
power
Shield
2
Positive
polarity
Positive
polarity
Positive
polarity
and power
Positive
polarity
and power
3
Return
Note 1*
Positive
return and
power
Negative
return and
power
Note 1*
If a balanced
microphone is
connected to an
unbalanced
amplifiers, the
number 3 pin of
the input will be
connectedto pin
number 1.
PIN ASSIGNMENT
3.1.1. Audio input connections
The AM-03 is equipped with three stereo audio inputs (19-20 input 1), (17-18 input 2), (15-16
input 3).
Connect the audio inputs already mentioned and be aware of that the equipment comes
equipped with a parallel output for the selected output (13-14 parallel output). This permits to direct
the audio signal that is being monitored, for example, metering instruments, patch panel, etc.

4. OPERATION INSTRUCTIONS
4.1. General
The AM-03 Self Amplified Audio Monitor has been designed in accordance with the actual
needsoftheoperatorsandaudio technicians that carry out theirlabourinTVandradiobroadcasting
controls, mobile production units and retransmissions, VTR rooms, cinema control cabinets, multi
video systems, etc.
The AM-03 allows stereo monitoring using a very small space. It includes five speakers fed by
three way power amplifiers.
This design provides significant advantages offering high quality sound properly calibrated for
operatorsworkingwithinacloseaudiorange(between30to90cm),thankstoitsthreewayspeakers
(low,high-midrangeinleftchannelandhigh-midrangeinrightchannel).Also,thephasemeterinthe
front panel is able to detect any signal out of phase, background noise, etc.
All the controls are located on the front panel of the equipment:
- Gain control
- Three stereo audio inputs selector.
- Left or right channel and balance selector.
- Headphones connector with automatic speaker disconnection.
- Phase meter.
- On / off switch with power led indicator.
The AM-03 provides innovative solutions to multiple audio monitoring problems, offering
comparable funtions to bigger monitors in one unit rack, saving rack space and gaining portability.
Themagneticshieldingoftheequipmentallowstopperformancesinenvironmentsnexttovideo
monitors without video image degradation.
4.2. Operating the equipment
4.2.1. Gain control
The gain control (6) of the unit allows adjusting the volume of the speakers or the headphones
(1). The unit is equipped with a power limiter, factory adjusted to the maximum level admitted by the
equipment.

4.2.2. L/R balance selection
The balance switcher (7) admits us to balance the signal between the left and right channels
or, if necessary, using only one of this, turning the switch anti-clockwise for the left channel or
clockwise for the right channel.
4.2.3. Audio Input selection
The switch (8) allows us to select one of the three stereo audio inputs that the unit is equipped
with.
Rememberthat theinputselected withthisswitchwillalsobepresentattheparalleloutput (13-
14), as already mentioned in Section 3.1.1.
4.3. Audio phase metering
4.3.1. General
The phase meter permits us to monitor the audio signal in phase. This can be done in stereo
or only left or right channel respectively.
4.3.2. Left channel signal presence
Inthecase thattheequipmentonly disposesofasignal procedingfromleftchannel,the phase
meter will illuminate as shown in figure 5.
FIGURE 5
4.3.3. Right channel signal presence
Inthecasethattheequipmentonlydisposesofasignalprocedingfromrightchannel,thephase
meter will illuminate as shown in figure 6.
FIGURE 6

4.3.4. Stereo signal presence in phase
In case the equipment is receiving an stereo signal in phase, the phase meter will present the
following aspect (fig. 7).
FIGURE 7
4.3.5. Monoaural signal presence in phase
Incasethatthesignalpresentinbothchannelsismonoaural,anditisinphase,thephasemeter
will present the aspect as shown in figure 8.
FIGURE 8
4.3.6. Stereo signal presence out of phase
In the case that the signal received by the equipment is stereo, but out of phase, the display of
the phase meter will have the aspect as in figure 9.
FIGURE 9
4.3.7. Monoaural signal presence out of phase
In the case that the signal received is monoaural, and out of phase, the display of the phase
meter will have the aspect as shown in figure 10.
FIGURE 10
4.4. Headphones monitoring
4.4.1. Headphones connector
The headphones connector (1) gives the opportunity to carry out a direct monitoring. The
disconnection of the speakers will be done automatically when the headphones jack is inserted on
the connector. All the controls (gain, balance, etc.) will remain operative in this listening mode.

5. DESCRIPTION OF AM-03 FRONT AND BACK PANELS
5.1. AM-03 front panel
1.- Headphones connector.
2.- Left channel mid - high frequency stereo way.
3.- Phase meter.
4.- Monoaural low frequency way.
5.- Right channel mid - high frequency stereo way.
6.- Gain control.
7.- Left / right and balance control.
8.- Stereo input selector (1,2,or 3).
9.- Power on / off switch.
10.- Power indicator led.
5.2. AM-03 back panel
11.- Mains connector socket and fuse's box
12.- Voltage selector.
13.- Parallel audio output for the selected right channel input.
14.- Parallel audio output for the selected left channel input.
15.- Audio input number 3. Right channel.
16.- Audio input number 3, canal "L".
17.- Audio input number 2, canal "R".
18.- Audio input number 2, canal "L".
19.- Audio input number 1, canal "R".
20.- Audio input number 1, canal "L".

6. TECHNICAL SPECIFICATIONS
6.1. Technical specifications of the AM-03
Inputs: 3 stereo inputs, selectable from the front panel, electronically balanced
with RF filter.
Impedance: > 100 KOhm.
Nominal level: 0 dBv.
Conectors: XLR - 3 female.
Outputs: 1stereo parallel audio output to the selected input, with direct cable
connection.
8 ó 600 Ohm, stereo headphones connector female 1/4" connector
with automatic speaker disconnection.
Controls: Input selector; 1 de 3.
Balance control.
Gain control.
Metering: Phase meter Left Right by 25 led matrix in a 5 x 5 configuration.
Acoustic
System: Three ways acoustic system:
Low: Monoaural. 1 compression magnet-dynamic speaker.
Mid: Stereo. 2 compression magnet-dynamic speakers.
High: Stereo. 2 piezo-electric speakers.
LImiter: Incorporated to protect speakers, adjusted to the optimal output
power.
Cross -over frequencies:
Low-Mid: 600 Hz.
Mid-High: 4 KHz.
Frequecy responso:
65 Hz to 19 KHz.
Harmonic distortion: < 0.1 %.
Power 110V / 220 V AC, 50 - 60 Hz, 50 VA., with voltage selector and power
requirements: supply incorporated.
Dimensions: Width: 483 mm (19").
Height: 44 mm (1 Unit rack).
Depth: 365 mm (14.4").
Weight: 6.2 Kilograms.
Note: The technical specifications contained in this page are merely orientative. They are subject to change without previous advice.