User manual BSS DPR402

[. . . ] DPR 402 User Manual 1 V3. 0 JMK 13 May 1997 This equipment has been tested and found to comply with the following European Standards for Electromagnetic Compatibility: Emission Specification: Immunity Specification: Mains Disturbance: EN55013 EN50082/1 EN61000/3/2 (1990) (1992) (1995) (Associated equipment) (RF Immunity, Fast Transients and ESD) For continued compliance ensure that all input and output cables are wired with cable screen connected to Pin 1 of the XLR. The input XLR Pin 1 on BSS equipment is generally connected to chassis via a capacitor to prevent ground loops whilst ensuring good EMC compatibility. We have written this manual with the aim of helping installers, sound engineers and musicians alike get to grips with the DPR-402 and obtain its maximum capability. If you are new to BSS products, we recommend that you begin at the start of the manual. If, however, you are already familiar with the intended application, and just want to get the unit installed without delay, then follow the highlighted sections. [. . . ] The peak limiter threshold is unaffected by the GAIN control, and is set by the PEAK LIM control, which is scaled directly in dBv. A green LED is provided to indicate when limiting begins, and a red LED indicates when heavy limiting occurs (above 10dB) (See figure 12. 4). This red LED indicates that more than optimum peak limiting is being used, and the output gain control should therefore be backed off, so that it only flashes on occasional peaks. Fig 12. 4 PEAK LIMITER controls 27 Rear Barrier Strip 13. 0 Rear Barrier Strip The DPR-402s rear barrier strip provides an interface with the main compressor section, allowing for various configurations which utilise the internal facilities as well as external equipment. For correct operation of the unit, make sure that both the SUBTRACT and CONTROL side chain points are closed, either by links or by externally connected equipment. Connections to the subtract side chain will be phase conscious, whereas those to the control will not be. Any externally connected equipment should operate at unity gain, and be capable of handling signal levels up to +20dBv. Rear Barrier Strip Designations Pin A B C D E F G H Function Ground Insert Return : Insert Send : Insert Send : Insert Send : Insert Send : Insert Return : Insert Return : Control Side Chain Reversed Phase Normal Phase L. F. Re-emphasised Subtract Side Chain Subtract Side Chain Gain Link (Expand or over infinity mode) J K L M Ground Insert Send : Insert Send : Stereo Link Subtract LP Filter Control LP Filter Fig 13. 1 Rear Barrier Strip 28 Operation/Applications 14. 0 Operation and Applications 14. 1 Compression Barrier strip linking B-C and D-G (as factory set). Controls MODE SWITCH THRESHOLD RATIO ATTACK RELEASE GAIN CHN BYPASS DE-ESS THRSHLD FREQ PK LIM THRSHLD Position Compress Out 4 Auto 0dB In (Illuminated) Out Out Rotate the THRESHOLD control anticlockwise until the BELOW THRESHOLD meter is fully illuminated and an appropriate amount of gain is indicated on the GAIN REDUCTION meter. This operation will be accompanied with a drop in output level, as indicated by the OUTPUT METER. The output GAIN CONTROL should now be adjusted to reinstate the output level. The levels of the uncompressed input signal and the compressed output signal can now be compared on the output meter by operating the METER INPUT switch. Final adjustments of the controls can then be made to suit particular requirements, including the RATIO, ATTACK, and RELEASE controls. The 'auto' position of the release control provides for a program related operation of the dynamics of the unit, and will be accepted for most general purpose applications. Should a tighter or looser requirement be neccesary, then both the attack and release controls can be set individually to suit. The experienced engineer will be able to set the compressor controls to near optimum position for any source material with the BYPASS switch out, so that the compressor can be 'dropped' into a live performance without disturbance. 14. 2 De-essing The DPR-402 has three modes of de-essing available, de-ess wide with simultaneous compression, de-ess wide with full dynamic control, and de-ess HF with full dynamic control. De-ess wide attenuates with whole frequency spectrum, and although acceptable for most vocal sources, it may cause undesirable side effects on a mixed program source (refer to section 12. 2 and 12. 3). De-ess HF only attenuates the high frequencies and therefore produces superior results in all cases, which is essential when de-essing a mixed program source. If simultaneous de-ess HF and compression are required, the separate channels must be used for each function. 29 Operation/Applications 14. 3 De-essing Wide with Simultaneous Compression Barrier strip linking B-C and D-G (as factory set). Set all compressor controls as required (refer to section 14. 1). For optimum deessing effect, no more than 10-15dB of compression should be used. If compression is not required, then set THRESHOLD to OUT. [. . . ] PEAK LIMITING: 2 LEDs to indicate normal and hard peak limiting. 42 Stereo Switch (Rear Panel): Rear Connections: Couples channel 1 and channel 2 control signals for stereo operation. INPUT: XLR 3-31 or equivalent (Balanced) OUTPUT: XLR 3-32 or equivalent (Unbalanced) ACCESS POINTS: Barrier strip, providing control and subtract side chain insertion points including HP and LP filter sends, pre-emphasis and de-emphasis network sends; inverse phase sends for expander mode; and control side chain DC access point for stereo, quad etc. , coupling and gating. Power: Mounting requirements: Switch selectable 120V or 240V, 50/60Hz, 15VA. (Ht x W x D) 44. 5mm x 483mm x 229mm 1U/1¾" x 19 x 9" 4. 5kg (Packed) Weight: 43 Warranty Information 19. 0 Warranty Information When sold to an end user by BSS Audio or a BSS Audio Authorised Reseller, this unit is warranted by the seller to the purchaser against defects in workmanship and the materials used in its manufacture for a period of one year from the date of sale. Faults arising from misuse, unauthorised modifications or accidents are not covered under this warranty. [. . . ]