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ALPS-1

ALPS-1 Audio Leveller-Leveler-AGC


Solving Audio Level Problems Completely:
DIGITAL, COST-EFFECTIVE and TAMPER-PROOF!


Perceived loudness, dynamic range and peak level; suitable for all situations where some combination of these three must be powerfully yet unobtrusively controlled.

BENEFITS:

• Brings consistency to all programme streams
  without erasing musical dynamics

• Ends listener annoyance from over-loud
  segments such as commercials and shouting
  DJs

• Improves audibility and clarity of programme

• Eliminates overload distortion and damage
  forever

• Eliminates the inconvenience of unauthorised
  tampering with front-panel controls

• Maintains programme path reliability – fail-
  safe mode


APPLICATIONS:

• Sound level control for Radio and Television

• Normalise levels of news booths and
  unattended studios, ingest points, etc.

• Overload protection for STLs, digital codecs,
  PA and monitors

• FM broadcast: Networks, Relay from satellite,
  Community Radio & RSLs

• Professional-level audio streaming, archiving
  and podcasting


FEATURES:

• Minimal feature set; very cost-effective yet
  fully professional

• Excellent quality – 96kHz and 88.2kHz native
  modes avoid unnecessary ASRCs

• Complete programme reliability - 'pass-
  through' relays for analogue and digital paths

• Factory presets deliver exactly the results
  you need for any application …fast

• No-tamper front panel (set-up by PC only)

• Bright, Always-Visible LED bargraphs for
  audio confidence checks

• Low audio latency (2.2 - 4 milliseconds), fast
  boot-up (<1 second)

• Stereo or Dual-Mono modes


SPECIFICATIONS:

Frequency Response:
DIGITAL-DIGITAL:        20Hz-20kHz +/-0.1dB
ANALOGUE-ANALOGUE: 30Hz-20kHz +/-0.5dB

Noise:
DIGITAL-DIGITAL (rms 20Hz-20kHz):
<-117dBFS
ANALOGUE-ANALOGUE: (rms 20Hz-20kHz):   
<-83dB ref: Limit point +8dBu

Distortion:
DIGITAL-DIGITAL (6dB limiting):
<-94dB / 0.002% THD
ANALOGUE-ANALOGUE (6dB limiting):
<-74dB / 0.02% THD

Stereo Separation (L/R crosstalk):
DIGITAL-DIGITAL (at 3kHz):         <-117dB
ANALOGUE-ANALOGUE (at 3kHz):  <-83dB

Inputs:
ANALOGUE: Active balanced, RFI-suppressed, 10k (bridging), standard operating level -6dBu to +14dBu (clip >+21dBu)
DIGITAL: AES-3 (XLR); 32, 44.1, 48, 88.2, 96kHz sample rate. 16, 20, or 24 bits.

Outputs:
ANALOGUE: Active true balanced, RFI-suppressed, standard operating level -6dBu to +14dBu
DIGITAL: AES-3 (XLR); full input rate / half rate.  24-bit.

Processing blocks:
Input HPF (adjustable) & LPF
Gated AGC: Capture range +/-20dB; maximum positive gain can be set.
Advanced AGC enables faster, programme-dependent operation; defeat plus three levels.
Compressor: Nominal 2:1 slope and 4dB maximum boost of low levels.  Defeatable.
Wide-band Limiter: Zero overshoot 1.3ms look-ahead zero clipping. Defeatable.
HF Limiter: Protects 50us or 75us emphasis curve for FM broadcast applications and de-essing. Defeatable.

Control:
Setup is via PC GUI only.  Select a factory preset, modify it, set levels etc, save to Flash memory.

Power:
100 – 230V AC / 5 Watts.

Dimensions & weight:
1-RU: 44 x 482 x 290mm deep / 1.75” x 19” x 11.25” deep.  Weight: 1.8kg / 4lbs


Computer Control:
Every processing parameter, including all thresholds and time constants, can be accessed and modified under PC control (GUI included).  For full range of panel and remote control options see ALPS-2 and ALPS-3  products.

Warranty:
3 year return-to-base warranty

Approvals:
CE (EMC & LVD), RoHS

[PRODUCT INFORMATION Issue 1.1 - E&OE
- SUBJECT TO CHANGE WITHOUT NOTICE.]



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Audessence Limited... Digital Audio and Broadcast
Audessence Ltd, 64 Kimberley Road, Brighton, East Sussex, UK | +44 (0) 330 6600 108

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