Redback A 1760 Operating Manual

Redback® A 1760 Microphone Delay/Mic-Line Recorder
1.0 INTRODUCTION
The Redback® A 1760 has three modes of operation,
Microphone Recorder and a Audio Recorder.
When in Audio Delay mode (Mode 0), recording is activated by either the PTT switch on a 5 pin XLR microphone connected
to the "MIc In" connector, or by the PTT switch or PTT trigger on the front of the unit. The A 1760 is designed to be inserted
in between a microphone and an amplifier (for example), to remove feedback issues which arise when paging is executed
in close proximity to the output speakers. This is achieved by delaying the output audio. The audio into the Mic or Music
inputs will continue to be recorded while any of the PTT contacts are closed. Once the PTT contact becomes open, recording
is completed and the recorded message will play back instantly. The recorded messages are stored on the Micro SD card for
playback at a later date if required. A maximum of 999 recordings can be stored with the first message being over ridden
once the limit is achieved. An optional pre announcement and/or post announcement chime or message in .mp3, .ogg or
.wav. format can also be included with the playback.
When the unit is in Microphone or Audio recording modes (Mode 2 or 3), a momentary closure of the PTT switches will
activate recording through either the respective Mic or Music inputs. As the audio is being recorded it is stored on the Micro
SD card in the same manner as in the Audio Delay mode. The audio can be "Passed Through" to the Mic output connector
as it is recorded, or set to NO audio output. When in "Audio Pass Through" the "Output Active" contacts will be closed,
enabling remote monitoring. Recording is stopped when another momentary closure of the PTT switches occurs. The record-
ing is saved to the Micro SD card and no further action is taken. The recorded messages can be accessed from the Micro SD
card for playback at a later date if required.
2.0 SPECIFICATIONS
FREQUENCY RESPONSE
Mic input :.............................................50Hz - 12kHz, -3dB
Music input: .........................................50Hz - 15kHz, -3dB
INPUT SENSITIVITY
5 pin XLR Mic input: ................................................... 3mV
3.5mm Music input: .......................................................1V
OUTPUT SENSITIVITY
3 pin XLR Mic output: ................................................. 3mV
OUTPUT CONNECTORS
Output Active closing contact: ....................Screw terminals
Mic output: ......................................................... 3 pin XLR
PTT ACTIVATION....... PTT via 5 Pin XLR microphone switch
Distributed by Altronic Distributors Pty. Ltd. Perth. Western Australia. Phone: 1300 780 999 Fax: 1300 790 999
www.redbackaudio.com.au
A 1760
determined by DIP switches,
or PTT Screw terminals
or PTT switch
* Specifications subject to change without notice.
Operating Manual
Microphone Delay/Mic-Line Recorder
which
INPUT CONNECTORS
Mic Input: ..............................................5 pin XLR balanced
Music Input: ...................................... 3.5mm stereo socket
24V DC power: ..........................................Screw terminals
24V DC power: .......................................... 2.1mm DC Jack
PTT Trigger: .................................................Screw terminals
CONTROLS
LED Indicator:...Ready, Recording, Busy, Playing, No SD Card
AUDIO FILE FORMATS ........................mp3, .ogg or .wav
POWER SUPPLY ..........................................24V DC 1Amp
CURRENT DRAW .................................... 40mA @ 24V DC
DIMENSIONS ................ 134mm(L) x 75mm(D) x 46mm(H)
WEIGHT ................................................................... 0.2kg
Redback® Proudly Made In Australia
include an Audio Delay, a
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