LDA Audio Tech A-1 User manual

Model: A-1
User's Manual
PAGING MICROPHONE

Content:
1 TECHNICAL DESCRIPTION:...................................................................................................... 1
2 PACKAGE CONTENT:................................................................................................................ 1
3 FUNCTIONING DESCRIPTION:.................................................................................................. 2
3. 1 Functioning modes:.................................................................................................................... 2
4. CONNECTION AND CONFIGURATION..................................................................................... 3
5. FRONTAL DESCRIPTION............................................................................................................ 4
6 TECHNICAL SPECIFICATIONS:.................................................................................................. 5
.......................................................................................................................................................... 5
WARNING:
This piece of equipment must not be exposed to dripping or splashing and no objects filled
with liquids, such as vases, shall be placed over it.
AC power cords are the primary disconnect devices for this product and should be easily
accessible at all times.

1 TECHNICAL DESCRIPTION:
The A-1 is an advanced paging microphone for professional PA installations.
The microphone features control by logical digital signals.
It features functions of “all-call”, signalling floor given and occuppied line by led lights.
The sound processing has been adapted to achive high quality results, in terms of quality,
distortion, sensitivity, broadband and S/N ratio. That is why the A-1 includes a high quality
dynamic capsule.
The A-1 has different modes of configuration, in order to be easily integrated in any type of
installation. Additionally, it features pre-amp to provide a balanced output and preserve the
audio quality in long distances.
As an option, it is possible to configure a chime tone before and after a paging.
2 PACKAGE CONTENT:
1 A-1 Microphone
2 Gooseneck
3 5 V DC Power supply
4 Anti-pop filter
5 XLR-5 female connector
6 User's manual
LDA Audio Tech - 31 st Severo Ochoa St.- 29590 MÁLAGA, SPAIN. Tl: [phone]. www.lda-audiotech.com 1
USER'S MANUAL: A-1

3 FUNCTIONING DESCRIPTION:
The microphone A-1 functions as an “all-call” , press to talk, single button
microphone. It features light indicators to signal the state of the line/zone where the
page will be broadcasted.
3. 1 Functioning modes:
Depending on the selected configuration, the microphone has different ways of
acting in the system (see 4, Connection and configuration):
•PTT/LATCH MODE: Throughout the microphone selector, the behavior will be
different. When its position is OFF, the microphone will work in PUSH TO TALK
(PTT) mode, that is, the button should be pressed in order to make a page. In the
position ON, with the first push of the button the microphone will be fixed on the
“floor granted” to the user, and it will cease emitting once pushed again.
•0V/5V MODE: Using the operation selector, it is possible to configure the TTL
output line signal, to indicate the use of the audio line in the system. 0V is low level
signal and 5V is high level signal.
•ON/OFF CHIME: This position indicates if the chime tone is ON or OFF.
•TTL/RS-485 MODE: As a default, the functioning mode is TTL. Optionally, the A-1
can use the RS-485 protocol to communicate with LDA compatible units. In that
case, this option should be active and the “jumpers” situated in the correct position.
This option will always be activated by the technical team because a wrong
configuration could severely damage the A-1.
•BUSY=LED MODE: This selector configures the operating mode against a busy
line signal. On the one hand, if it is in the OFF position, the microphone will not
send audio or operation signals while the “BUSY LINE” signal is active. On the
other hand, in the ON position, the microphone will only operate over the
corresponding light indicator, sending signals of petition and audio. This mode
requires normally a microphone signal process.

4. CONNECTION AND CONFIGURATION
EXTERNAL CONNECTION & CONFIGURATION:
1. Gain control: The potentiometer adjust the audio output gain.
2. PTT/LATCH selector
3. Audio+Control connector XLR 5 pole male.
Pin out:
1. GND
2. Audio -
3. Audio +
4. Operation output 0/5 V
5. BUSY input, active at 0V.
4. Power supply: 5V DC
5. XLR-3 female connector for gooseneck.
1. GND
2. 2. Audio+Power supply to the capsule
3. LED
LDA Audio Tech - 31 st Severo Ochoa St.- 29590 MÁLAGA, SPAIN. Tl: [phone]. www.lda-audiotech.com 3
USER'S MANUAL: A-1

INTERNAL CONFIGURATION
5. FRONTAL DESCRIPTION
In the frontal part of the microphone is where there are all the elements necessary to its
operation.
1. TALK button
2. Indicator of busy line, permission to talk.
3. Light indicator to signal that the capsule is
active and ready to page.
N NAME CONFIG.
1 CHIME SELECT* ON / OFF
2 MAN SELECT 0V / 5V
3 BUSY=LED
TTL=ON ON/OFF ON/OFF
4 RS485/MAN&BUSY A/B
5 GAIN ADJUST +/-

6 TECHNICAL SPECIFICATIONS:
Model A-1
Reference LDAA1S02
Power supply 5V DC , 200mA.
Frequency response 200- 15000 Hz (+ -2dB).
Audio output 750mV 600 balanced
S N ratio 100 dB (A weighting)
Sensitivity -43 dB. at 1KHz
Direction Axial polar hypercardioid diagram
Transducer type Condenser
Dimensions 125 x 45 x 125 mm (width x height x depth)
Length of gooseneck 350mm
Power consumption 1W
LDA Audio Tech - 31 st Severo Ochoa St.- 29590 MÁLAGA, SPAIN. Tl: [phone]. www.lda-audiotech.com 5
USER'S MANUAL: A-1

Ver. 1