NC200A/IC Factum Radioscape TV Equipment

Additional Features:

• AD conversion of two sound (stereo) channels
• Transcoding of digital sound signals to NICAM format
• QPSK modulator
• Optional Encoder-only version
• Optional 2-channel Encoder version

Audio Inputs

• Nominal level (NICAM test level): 0 dBu (differential inputs)
• Impedance: 600 Ohms ±1% alt. high impedance
• Connector: XLR, female type

FM Channel Audio Output

• Mono Mode: M1/left channel
• Stereo Mode: (A+B)/2
• Gain: 0 dB (sel. +3 dB in stereo mode)
• Impedance: < 1 Ohm, electronically floating output (either side may be grounded)
• Load: > 600 Ohms
• Frequency Response: within ±0.1 dB, DC -20 kHz
• Overload level: Balanced: > +24 dBu; Side grounded: > +18 dBu
• Noise: < -92 dBu rms 20 Hz-20 kHz
• Distortion: < 0.005%
• Crosstalk: < -100 dB (M2 to M1)
• Connector: XLR, male type

A/D Conversion

• Pre-emphasis: CCITT J.17 (analogue)
• Digital Overload Level System BG/DK: +22 dB at 400 Hz
• Digital Overload Level System I: +24.3 dB at 400 Hz
• Sampling Frequency: 4096 kHz
• Resolution: 16 bits (delta/sigma)
• Frequency Response: 20 Hz-13.75 kHz: within ±0.2 dB (rel. ideal CCITT J.17); 14 kHz: -0.5 dB; 14.75 kHz: -3 dB; >17.3 kHz: < -65 dB
• Crosstalk: < -90 dB at 1 kHz
• Distortion THD+N: 0.01% at 1kHz max input (typical)
• NICAM Encoded Signal: 0.04% (typical)
• Noise: -70 dB rel. 0 dBu (typical)

Stereo/Dual Mono Mode Switching Input

• Stereo: Logic ‘1’
• Mono: Logic ‘0’
• Connector: 3.5mm jack
• Electrical Interface: CMOS input with 10kOhms pull-up resistor

Data + Clock Output (Optional)

• Logic Levels: ±2.5 V into 75 Ohms load
• Impedance: 75 Ohms, ± 10%
• Polarity: Positive voltage, logic ’one’
• Phasing: Data changes on negative clock transitions
• Connectors: BNC

NICAM Intercarrier Signal Output

• Frequency - System BG/DK: 5.850 MHz
• Frequency - System I: 6.552 MHz
• Impedance: 75 Ohms
• Subcarrier Accuracy: ± 2 ppm when locked to internal reference
• Spectrum Shape –System BG/DK: Roll-off 0.4
• Spectrum Shape –System I: Roll-off 1.0
• Demodulated Response: eye height > 85%
• Harmonics and Spurious Noise: < -50 dB rel. NICAM carrier level
• Connector: BNC

Power Supply

• Voltage: 100V – 264V AC
• Frequency Range: 48Hz – 64Hz
• Connector: IEC 320
• Typical Power Consumption: 15W (typical)

Chassis

• Type: 19” rack-mounting
• Dimensions: 44mm (h) x 482mm (w) x 360mm (d)

Environmental

• Operating Temperature: +5° - 50°
• Humidity: 10% - 85% noncondensing

The Factum Radioscape NC200A/IC is an Encoder/QPSK Modulator for NICAM 728 System B/G, D/K and I. The Encoder is mainly used in broadcasting networks, but also used for CATV and in laboratories. The output is a QPSK modulated carrier at intercarrier frequency, locked to the bit-rate. The NC200A/IC converts analogue stereo sound via A/D conversion of two sound (stereo) channels, Transcoding of digital sound signals to NICAM format and QPSK modulation. Options include a 2-channel version and an Encoder-only version with Data + Clock output.