The RB-TGHD is an 8 channel audio tone generator that provides line identification for multi-channel audio systems, including 5.1 and 7.1 surround sound typically used in high definition television broadcasts. By using a range of widely accepted industry standard tone sequences such as the EBU R49, GLITS and BLITS tones, channel identification and associated levels can be determined easily. Correct channel configuration in fold-down mixes can also be highlighted when a broadcaster needs to mix several audio channels into a stereo feed. The RB-TGHD caters for 2, 4, 6 and 8 channel configurations and all of the available audio tone sequences for each channel configuration can be cycled through automatically, or selected manually, and a loop mode allows patterns of tones to be repeated. A bank of 4 pushbuttons on the front panel sets these options and the associated LEDs indicate the current setting. A set of 8 LEDs on the front panel indicate which channel is currently outputting audio with the LEDs numbered as both 1-8 and as L, R, C, LFE, LS, RS, LR and RR.
Product Features
8 analogue and 8 digital output channels.
EBU R49, GLITS and BLITS tones, with channel identification.
2, 4, 6, and 8 channel configurations.
Wordclock sync input.
Optional analogue and digital video sync boards available.
Audio level line-up adjustable from 0dBu to +24dBu.
Available with BNC (B) or XLR (X) digital audio outputs.
Programmable audio tone sequences using SCi serial remote (RS232).
Typical Applications
It allows correct channel configuration in fold-down mixes when you need to mix several audio channels into a stereo feed, e.g. 5.1 and 7.1 surround sound.
Product Category
Signal Generators
Technical Specifications
Technical Specification
Analogue Output Impedance: <50Ω
Digital Output: 110Ω balanced
Impedance: 75Ω unbalanced
Dynamic Range: >100dB
Max Output Level: +24dBu
Distortion & Noise: <-85dB THD+N at 1kHz
Crosstalk: <-110dB (20Hz to 20kHz) for analogue outputs
Front Panel Controls
Channels: 2, 4, 6 or 8
Sequence Mode: Auto or Manual
Sequence: EBU R49 stereo line-up
Sequence: GLITS stereo line-up
Sequence: BLITS stereo line-up
Sequence: EBU R49 channel ID
Sequence: BLITS channel ID
Sequence: Phase
Sequence: User defined (using SCi)
Sequence Loop Mode: On or Off (enables looping of current sequence)
Digital Sample Frequency: 32kHz, 44.1kHz, 48kHz, 88.2kHz 96kHz, 176.4kHz or 192kHz (via DIPswitches)
Digital Sample Width: 16bit or 24bit (via DIPswitches)
Audio Line-Up: 0dBu to +24dBu in 1dB steps ref FSD (via DIPswitches)
Channel Identification: LEDs indicating 1-8 and L, R, C, LFE, LS, RS, LR and RR
