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A complete air-chain broadcast audio processor for AM radio stations. Powerful yet subtle AGC plus enhancement features for brightening and clarifying your program. Meets UK and international broadcasting specifications.
BENEFITS:
- Loud, clean audio for AM broadcasting
- Handles speech just as well as music (not all digital audio processors manage this!)
- Improves audibility and clarity of programme
- Meets all national and international spectral occupancy and other specifications
- Automatically adjusts levels if output from studio is too low
APPLICATIONS:
- Audio processing for all AM broadcast applications:
• LW
• MW (AM)
• SW / HF
FEATURES:
- Complete digital air-chain processing for AM radio broadcasters in a compact package
- Adjustable input High-pass filter 3Hz to 200Hz
- Phase rotator to reduce programme asymmetry
- Advanced AGC as used in our ‘ALPS’ audio levellers offers unsurpassed rapid control of levels
- Independent programme compression stage
- Presence enhancer to brighten programme and cut through noise
- Choice of pre-emphasis to meet national requirements including NRSC
- Adjustable low-pass filter for all applications Fco 4.5kHz to 10kHz
- Sophisticated peak control dramatically increases loudness without digital grunge
- Positive peak asymmetry up to 145% (where legal)
- Factory presets deliver exactly the results you need for any application …fast
- No-tamper front panel (set-up by PC only: GUI software, USB and RS-232 ports provided)
- Bright, Always-Visible LED bargraphs for audio confidence checks
- Low audio latency (4 milliseconds), fast boot-up (<1 second)
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SPECIFICATIONS:
Frequency Response:
DIGITAL-DIGITAL: 20Hz-9.75kHz +/-0.1dB
ANALOGUE-ANALOGUE: 30Hz-9.75kHz +/-0.5dB
Noise:
DIGITAL-DIGITAL (rms 20Hz-20kHz):
<-110dBFS
ANALOGUE-ANALOGUE: (rms 20Hz-20kHz):
<-75dB ref: Limit point +8dBu
Distortion:
DIGITAL-DIGITAL (6dB limiting):
<-90dB / 0.003% THD
ANALOGUE-ANALOGUE (6dB limiting):
<-70dB / 0.03% THD
Inputs:
ANALOGUE: Active Balanced, 10k (bridging), standard operating level -6dBu to +14dBu
DIGITAL: AES-3 (XLR); 32, 44.1, 48, 88.2, 96kHz sample rate. 16, 20, or 24 bits.
Outputs:
ANALOGUE: Active True Balanced, standard operating level -6dBu to +14dBu
DIGITAL: AES-3 (XLR); full input rate / half input rate.
Processing blocks:
High-Pass: 3dB Frequencies 3Hz [DC Block], 20Hz, 30Hz, 45Hz, 75Hz, 90Hz, 135Hz, 150Hz, 180Hz, 290Hz.
Phase Rotator: Cancels asymemetry in certain programme material.
Gated AGC: Capture range 40dB (+/-20dB) maximum positive gain can be set. Advanced AGC enables faster, programme-dependent, operation.
Compressor: Nominal 2:1 slope.
Presence Enhancer: Boosts selected frequencies for intelligibility and / or brightness.
Limiter: Look-ahead limiters plus NCDCS anti-aliasing clipper.
Low-Pass Filter: Cut-off frequency 4.0, 4.5kHz, 5kHz, 5.5kHz, 6kHz, 6.5kHz, or 10kHz NRSC compliant.
HF Limiter: 50us or modified 75us (NRSC) emphasis curve.
Control:
Setup is via PC GUI only. Select a factory preset, modify it, set levels etc, save to Flash memory. USB on front panel, plus RS-232 on rear panel. ASCII Text based command format. Choice of ‘Easy’ mode (simplified, with Wizard), or Expert mode for GUI control.
Power:
100V - 230V AC / 5 Watts.
Dimensions & Weight:
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).
Warranty:
3 year return-to-base warranty
Approvals:
CE (EMC and LVD), RoHS
[PRODUCT INFORMATION Issue 0.2 - E&OE - SUBJECT TO CHANGE WITHOUT NOTICE.]
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