TC ELECTRONIC PROCESSORS - DB4 MKII - Transmission processor
The DB-4 mkII is a dual-engine loudness tool with redundant power, designed for broadcast centres such as regional television studios. Using this hardware along with the TC Icon remote or a connected computer running TC Icon Software, the user can ensure that the loudness of the source is compliant with the latest legislation including ITU BS.1770, EBU R128, ATSC A/85, TR-B32, and OP-59.
The two engines of the DB4 are capable of running a total of two independent processing algorithms and a LM6 Radar meter.
Algorithms that are pre-installed include:
LM6 - a visual reference of an audio source including information such as loudness history, momentary loudness, program loudness and loudness range.
DMix - an algorithm that allows the downmix, peak limit, and loudness of a mono, stereo, or 5.1 source.
UpCon HD -.uses intelligent monitoring to 'seemlessly' crossfade any signals to 5.1 if they fall back to stereo.
Multiband 5.1 - simple four band dynamic control for 5.1 including compression, limiting and expansion.
EQ/Delay 8 - multi-channel EQ with four band parametric EQ, and user defined delay.
ALC6 - automatic loudness management with correction.
MDX 5.1 - a dynamic controller with compression and limiting for multichannel signals.
ATX/DTX - 48 bit peak limiter, level optimiser and loudness control for stereo, wide stereo, or dual mono signals.
Downconvert 5.1 - is an algorithm to downmix multichannel formats such as 5.1, to stereo or mono output.
The 2U front panel is mainly dedicated to visual indication, with LEDs illuminating green to signal power to each of the two independent power sources - these LEDs light up red if there is a problem with the related power input. A single LED shows the status of the unit - with green being 'ok', flashing orange meaning 'update in progress' and red indicating a network issue. Additionally, the front panel houses a reset button which can be used to reset the I/P address to default and a PCMCIA slot whereby a user can use a card of up to 2MB SRAM to store additional presets and banks.
The rear panel has IEC inlets for mains power and input and output connectors.
The DB-4 mkII is offered in four configurations. All share the same features of MIDI in/out/through connectors, 6.35mm jack input socket for SMPTE sync and a 6.35mm jack socket input to which a pedal can be connected to switch up to eight presets. A ground-lift switch can also be used if there is a problem with mains 'hum'. An RJ45 Ethernet LAN connection can be used to link to a computer or TC Icon remote.
These configurations have in addition the differing I/O options listed:
87-0141 8-channel single-stream HD SDI with BNC I/O
87-0142 16-channel dual-stream HD SDI with BNC I/O
87-0143 8-channel AES I/O with balanced D-sub connectors and XLR breakout
87-0144 8-channel AES3id I/O with unbalanced BNC connectors
Inputs and outputs:
87-0141: 2x 75 ohm BNC input, 2x 75 ohm BNC output, 1x Firewire.
87-0142: 4x 75 ohm BNC input, 4x 75 ohm BNC output, 1x Firewire.
87-0143: balanced 110ohm 25-pin D-Sub.
87-0144: 4x unbalanced 75ohm BNC input, 4x unbalanced 75ohm BNC output
Power source: 2x 100-240 V AC, 50-60 Hz, 60W. Dimensions: 89 x 483 x 305 (h x w x d) mm. Weight: 8.6kg
If more processing in a single mainframe is required, the DB-8 MKII has the same functionality and algorithms as the DB-4 mkII however it houses four processing engines so is capable of running four independent and simultaneous algorithms - sometimes preferred in larger broadcast centres. See TC Electronic Processors - DB8 MKII - Transmission processor