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These eight channel, audio tone generators provide 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 including 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. External synchronisation is by word-clock or optional boards to provide analogue video, digital audio or digital video inputs. The units are 1U rack-mounting.

RB-TGHDX - XLR Digital Outputs

The generator offers the choice of the following tone sequences: EBU R49 stereo line-up, GLITS stereo line-up, BLITS stereo line-up, EBU R49 channel ID, BLITS channel ID, Phase and user-defined sequences. The audio level line-up level can be adjusted to suit different environments. Changing the audio line-up does not affect the gain relationship between each channel, ensuring that correct levels through the target system can be maintained. The serial port allows the RB-TGHD to be connected to a PC running SCi, the Sonifex Serial Control Interface. This allows full control of the unit and the ability to generate a user-defined audio tone sequence. In addition, a remote port provides a simple interface to control the unit and has several outputs to indicate which tone sequence is active.

The front panel has an LED to show power. Eight LEDS marked 1 to 8 as well as L, R, C, LFE, Ls, Rs, Lr, Rr, show activity on the eight outputs. A further LED indicates when the unit is synchronised to an external word-clock signal or optional video sync cards. There are four push buttons, each with a set of LED indicators arranged in an arc. The first button selects how many channels are fed with signals, either 2, 4, 6 or 8. The second selects sequence mode, either automatic or manual. The third selects the tone output sequence, while the final button sets the sequence to play once or loop. A short press on the button restarts the sequence. A small panel may be unscrewed to reveal two banks of eight miniature (DIP) switches, which set the sample rate, sync mode, bit-rate and audio line-up level.

The rear panel has eight male XLR connectors providing the eight analogue outputs, which are also marked ‘L’, ‘R’, ‘C’, ‘LFE’, ‘Ls’, ‘Rs’, ‘Lr’, ‘Rr’. The AES/EBU balanced digital outputs are provided with four more male XLR connectors, marked ‘1+2’, ‘3+4’, ‘5+6’, ‘7+8’ as well as ‘L+R’, ‘C+LFE’, ‘Ls+Rs’, ‘Lr+Rr’ respectively. 9-pin and 25-pin female D-sub connectors provide the RS232 serial port and the remote control connections. A BNC connector provides a word-clock sync input, which is also used for the optional sync boards if fitted. The IEC AC power inlet has an adjacent fuse.

Analogue output: +24V maximum, 50 ohms. Distortion: Better than -85dB THD+N, 1kHz. Dynamic range: Better than 100dB. Crosstalk: Better than -110dB, 20Hz to 20kHz, for analogue outputs. Sample frequency: 32, 44.1, 48, 88.2, 96, 176.4 or 192kHz switched. Sample width: 16 or 24 bits, switched. Audio line-up level: 0dBu to +24dBu, in 1dB steps, for FSD, switched. Power source: 85-264V AC, 47-63Hz, 60W peak, 30W average. Dimensions: 480 x 158) x 43mm, 1U rack mounting. Weight: 1.3kg.

Included accessories: Manual, AC power cable.
Optional accessories: RB-RK3 Rear rack panel kit. Sync boards, see below.

RB-TGHDB - BNC Digital Outputs

This is similar to the RB-TGHDX except that rather than four balanced XLR connectors for the AES/EBU digital audio outputs, there are four BNC types for unbalanced connections. Specifications and accessories are the same

Sync Boards

These mount inside the case, with a BNC connector protruding through a pre-punched aperture. They can be used to synchronise the outputs to a 48kHz sample rate. They are available as factory options replacing the standard word-clock board.

The RB-SYA analogue sync board will accept a composite signal of NTSC (525), PAL (625) and SECAM (625) signals covered by SMPTE-170-M (NTSC) and ITU-R BT.470-6 (PAL and SECAM).
The RB-SYD digital video sync board will accept 270Mbps SD-SDI and HD-SDI signals covered by SMPTE-259-M-C (SD) and SMPTE-292M (HD).
The RB-SYE AES/EBU sync board will accept a digital audio input signal with a sample frequency between 32kHz and 192 kHz. When using it, the channel status information that is encoded in the input data signal is copied to all digital output channels.

  Description Price £
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SONIFEX RB-TGHDX TONE GENERATOR Eight-channel HD, 8x analogue XLR and 8x AES XLR outputs Stock code: 95-7651
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SONIFEX RB-TGHDB TONE GENERATOR Eight-channel HD, 8x analogue XLR and 8x AES BNC outputs Stock code: 95-7652
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SONIFEX RB-SYW SYNC CARD Word clock, for RB-TGHDX, RB-TGHDB Stock code: 95-7654
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