OMB AUDIO PROCESSOR COM LIM 20
Digital stereo generator, 4 bands audio processor and RDS
The OMB COM LIM 20 audio processor is the combination of a professional digital stereo generator (with more than 60dB channel separation) and a high-dynamic limiter, with stop band rejection higher than 90dB above 75KHz. A 4-band equalizer is integrated, too. All these advanced characteristics give the COM LIM 20 an outstanding range of professional features, really useful in radio studios. It also includes RDS/RBDS digital encoder, and programming, visualization and control trough LCD display.
GENERAL CHARACTERISTICS
- WEIGHT 4.5Kg approximately
- DIMENSIONS 1 standard rack unit of 19”, 352x483x44mm
- AC RATE 220VAC/110VAC
- PRESET CURVES 30, factory programmed
ANALOG STEREO AUDIO INPUT
- CONVERSION 24bit
- CONNECTOR TYPE XLR (F) el. Balanced
- MAX. INPUT LEVEL +20dBu
- LEVEL RANGE -12dBu to 12dBu (1dB steps)
- IMPEDANCE 600 Ohm/10Kω EMI – suppressed
- AGC RANGE ±20dB (relative sensibility)
DIGITAL AUDIO INPUT (OPTIONAL)
- CONNECTOR TYPE XLR el. Bal. + optical Tos link
- FORMATS AES/EBU, SPDIF
- SAMPLING RATES 32KHz/44.1KHz/48KHz/96KHz
- CONFIGURATION Automatic selection and jitter correction
- INPUT SENSIBILITY 200mVpp
- AGC RANGE 0 to -20dBF
AGC OPERATION
- AGC SPEED 0 to 6dB/sec. (adjustable - 0.2dB steps)
- AGC HOLD TIME Selectable, from 0 to 3 seconds
- AGC MAX. GAIN Selectable 8, 10, 12, 15 or 20dB
PROCESSING
- Nº OF BANDS 4
- Nº OF PRESETS 30
- BASS COMPRESSOR THR: related to the chosen preset ATCK. Time: 80ms, REL Time: 250ms, Compression Ratio: 1: INF
- MID COMPRESSOR THR: related to the chosen preset ATCK. Time: 30ms, REL Time: 90ms, Compression Ratio: 1: INF
- HIGH COMPRESSOR THR: related to the chosen preset ATCK. Time: 10ms, REL Time: 50ms, Compression Ratio: 1: INF
- BROAD BAND LIMITER ATCK Time: 5ms, REL Time: 50ms. Applied to high frequencies band
- DYNAMIC EXPANDER (NOISE GATE) Gate threshold adjustable between -51dB and -80dB. Expansion ratio 2:1 (fixed)
STEREO AUDIO OUTPUT (ST VERSION ONLY)
- CONNECTOR TYPE XLR (M) el. balanced
- CONVERSION 24bit
- IMPEDANCE 600 Ohm/10kOhm EMI – suppressed
- LEVEL -10dBm to +14dBm (0.5dBm steps)
REMOTE CONTROL
- SERIAL PORTS 2 RS232 Sub D 9P optically decoupled
- BAUD RATE 19200 Baud
LOW PASS 15KHz INPUT FILTER
IIR 8th ORDER ELIPTIC, 15KHz/-0.1dB, 17KHz/-60dB
BY-PASS MODE (AGC Off, Gain Ofst 0dB, Out Lvl 0dB)
- FREQUENCY RESPONSE 30Hz-15KHz (±0.1dB)
- OUTPUT NOISE -90dB (A-weighted)
- THD 0.01%
- PASS BAND RIPPLE ±0.1dB
SIGNAL PROCESS FILTERS
- LP 400Hz IIR 2º Order-Butterworth
- BP 400Hz-5KHz IIR 4º Order-Butterworth
- BP 5KHz-15KHz IIR 4º Order-Butterworth
- HIGH FREQUENCY DENOISER Threshold adjustable -51 to -80dB
MPX OUTPUT (FM VERSION ONLY)
- CONVERSION 24bit
- PILOT FREQUENCY 19KHz ± 1Hz
- PILOT INJECTION -15.5 to -25.0dB (0.1dB steps, from 5.6% to 16.8%)
- PILOT PHASE Adjustable ±12 degrees (1dB steps) S/N >85dB
- STEREO SEPARATION 55dB typical on the whole band
- CROSSTALK M/S 60dB
- CROSSTALK S/M 60dB 38KHz SUPPRESSOR Less than measurable level
- MPX OUTPUT LEVEL -9dBm to +15dBm (0.1dBm steps)
- OUTPUT IMPEDANCE 600 Ohm
- OUTPUT CONNECTOR BNC floating over chassis, EMI supp.
- PILOT REF. OUTPUT TTL level wave
- PRE-ENPHASIS 50/75 usec.
AUX INPUT (1 Y 2) (MPX VERSION ONLY)
- CONNECTOR TYPE Floating BNC, EMI suppressed
- INPUT LEVEL -40 to 0dB
- IMPEDANCE 10 KOhm
- PURPOSE SCA, RDS inputs
CODER RDS/RBDS (FM VERSION ONLY)
- SUPPORTED STANDARDS RDS (RADIO DATA SYSTEM) according to standard CENELEC EN50067; RBDS (RADIO BROADCAST DATA SYSTEM) according to standard NRSC
- STANDARD CODING METHODS PI, TP, TA, M/S, RT, PSN, PTY, DI, AF (8 lists)
- CUSTOM CODING METHODS PS Sequence (up to 8 messages), PS Scrolling (up to 32 characters)
- RDS SUBCARRIER FREQUENCY 57KHz ±3Hz
- RDS OUTPUT LEVEL Adjustable from -44dB to -20dB (0.1dB steps)
- SYNCHRONIZATION To internal 19KHz pilot tone
Titel | Type | Størrelse | Download |
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OMB-COM-LIM-20_ING-1.pdf | 553.07KB | Download |