Specifications
System Performance
- Frequency Response: Follows standard 50µs or 75µs
- Separation: >70dB; 20Hz-15kHz.
- Noise (75µs De-emphasized, 100% modulation): <-90dB.
- Total System Distortion: 0.02% THD, 0.01% SMPTE IMD, 20Hz-15kHz.
- Spectral Protection: 61-100Hz (3dB or less overshoot peak reduction): Overshoot compensator-induced spectral splatter <-80dB.
- Crosstalk-Linear (referenced to 100% modulation): <-85dB.
- Crosstalk-Non-linear (referenced to 100% modulation): <-85dB.
- 38kHz Subcarrier Suppression (referenced to 100% modulation): -70dB.
- 76kHz Subcarrier Sideband (referenced to 100% modulation): <-85dB.
- Pilot: 19kHz, ±1Hz, adjustable, 7% to 11% modulation.
Installation Analog Input
- Configuration: Left and right.
- Impedance: 100k ohms. Termination resistor can be installed.
- Common Mode Rejection: >60dB.
- Sensitivity: Adjustable to +15dBu to produce 100% modulation.
- Maximum Input Level: +18dBu balanced or single-ended.
- Connector: XLR-type, female. EMI-suppressed. Pin 1 chassis ground, Pins 2 and 3 are electrically balanced and symmetrical.
Digital Input
- Configuration: Two-channel AES/EBU standard.
- Sample Rate: Variable, 32kHz to 48kHz, automatically selected.
- Sensitivity: -21 to 0dBFS to produce 100% modulation.
- Connector: XLR-type.
SCA Subcarrier Inputs
- Configuration: Subcarrier inputs sum into composite baseband outputs.
- Input Impedance: 600 ohms, unbalanced.
- Sensitivity: 0.8Vp-p for 10%, 1.0Vp-p for 12.5% modulation of main carrier.
- Maximum Input Level: +18dBu.
- Connector: BNC, floating over chassis ground. EMI-suppressed.
Composite Baseband Outputs
- Configuration: Two BNC outputs, each with independent Output Level control, output amplifier and connector.
- Source Impedance: 0 ohms voltage source or 75 ohms (jumper-selectable).
- Load Impedance: 37 ohms or greater. Termination not required.
- Level: (0 ohms source impedance, 75 ohms or higher load impedance): Adjustable, 0Vp-p to 8.8Vp-p (100% modulation) with Output Level control.
- Connector: BNC, floating over chassis ground. EMI-suppressed.
Pilot Reference Output
- Configuration: Buffered square wave reference for RDS or other subcarrier services, TTL level (0 to +5V peak).
- Source: TTL level signal. 0 to +5V peak.
- Connector: On Remote Control Interface.
AES/EBU Error Flag Output
- Source: +15V (On), -15V (Off); 10mA maximum.
- Connector: On Remote Control Interface.
Remote Control Interface
- Configuration: Seven inputs - select between Analog/Digital Input, Pre-Emphasis On/Off, Operation Mode (Stereo, Mono From Left or Mono From Right).
- Voltage: 5-12VAC or DC, momentary or continuous, optically-isolated. Current-limited 10VDC provided to facilitate use of contact closure.
- Connector: DB-25, male. EMI-suppressed
Physical
- Switches: Input (Analog, Digital), Stereo/Mono (Stereo, Mono L, Mono R), Pilot (On/Off), Crosstalk Test (Operate, Main>Sub, Sub>Main), Meter (Composite, Pilot), Limiter (On/Off).
- Screwdriver-Adjustable Controls: Drive (Left, Right and Digital) and Output Levels (Pilot, Comp 1, Comp 2).
- Metering: Two 10-segment LED bargraph displays show peak level of Left and Right inputs.
One 10-segment display shows Composite or Pilot output level. - Rear Panel DIP Switch: Selects Pre-emphasis In/Out, Pre-emphasis type (50µs or 75µs), J.17 de-emphasis In/Out, whether or not pre-emphasis and J.17 de-emphasis respond to AES/EBU status bits, digital input level range (four 6dB ranges), and overshoot compensator on/off.
- Power Requirements: Switch-selectable on the rear panel, 98-132VAC or 196-264VAC; 89-120VAC for Model 8218/J; 50-60Hz. IEC-standard detachable mains cord supplied. EMI-suppressed.
- Fuse: 1|2-amp 3AG 250V Slow-Blow for 115V operation; 1|4-amp "T"-type (250mA) Slow-Blow for 230V operation.
- Safety Standards: NRTL-tested to UL Standard 1419, IEC-65 and EN50082-1.
- Dimensions: 19" (48.3 cm) wide, 10.25" (26.1 cm) deep, 1 3|4" (4.5 cm) high. 1 rack unit.
- Operating Temperature: 32-122°F; 0-50°C.
- Humidity: 0-95% RH, non-condensing.
- Limited Warranty: One year parts and labor.
Circuit Characteristics Analog-to-Digital Converter
- Device: Crystal CS5390.
- Performance: 20-bit.
Digital Signal Processing
- Device: Motorola DSP56009.
- Performance: 24-bit, 144dB internal dynamic range.
Digital-to-Analog Converter
- Device: Analog Devices. AD1860.
- Performance: 18-bit.
Overshoot Control Limiter
- Range: 6dB or more, overshoot compensation and peak limiting.
- Overshoot Control at output (input overshoot less than or equal to 4dB): <0.6dB maximum; 0.4dB typical.
- Spectral Control (63-100kHz): Splatter caused by Overshoot Limiter <-80dB. Notches protect 19kHz pilot tone and 57kHz RDS spectrum <-80dB.
- Circuitry: DSPlockhead algorithm.
- Delay Time: 4 milliseconds.
Specifications subject to change without notice.