User Manual Digital Processor DMS48
CONTENTS CONTENTS V 1.1 Contents 1 Important safety instructions 5 2 Thanks and Unpacking 2.1 Unpacking the APG DMS48 . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 3 Introduction and Key Features 3.1 Introduction . . . . . . . . . . . . . 3.2 Key Features . . . . . . . . . . . . . 3.3 Drive Modules . . . . . . . . . . . . 3.4 LIR Linear Phase Crossover Filtering 3.5 FIR Linear Phase Equalisation . . . 8 8 8 9 9 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONTENTS C Input C.1 AES3 / Network Inputs C.2 Gain and Polarity . . . C.3 Delay . . . . . . . . . . C.4 High Pass Filter . . . . C.5 Parametric Equalisation C.6 FIR Shelving EQ . . . . C.7 Parametric Filters . . . C.8 Routing . . . . . . . . CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D Output D.1 AES3 outputs . . . . . . . . . D.2 Gain and Polarity . . . . . . . D.3 Delay . . . . . . . . . . . . . . D.4 High and Low pass Filters . . . D.5 LIR Crossover Filtering . . . .
1 IMPORTANT SAFETY INSTRUCTIONS I Technical Specifications I.1 Connectors . . . . . . I.2 Environmental . . . . I.3 Dimensions . . . . . . I.4 Options . . . . . . . I.5 DMS48 Synoptic view 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 IMPORTANT SAFETY INSTRUCTIONS 10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and the point where they exit from the apparatus. 11. Only use attachments / accessories specified by the manufacturer. 12. Unplug this apparatus during lightning storms or when unused for long periods of time. 13. Refer all servicing to qualified service personnel.
2 THANKS AND UNPACKING For customers in the USA This product has been tested for electrical safety and complies with: UL60065 7th edition. Federal Communications Commission Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
3 3 INTRODUCTION AND KEY FEATURES Introduction and Key Features 3.1 Introduction The APG DMS48 processor represents current state-of-the-art technology. Taking advantage of the latest advances in analogue to digital conversion and digital signal processing technologies the units achieve performance levels higher than previous devices. Below is a list of key features, followed by some information on the major advancements of the DMS48 feature set. 3.
3 INTRODUCTION AND KEY FEATURES 3.3 3.3 Drive Modules Drive Modules The DMS48 processor has a new way of ordering and grouping channels in order to give a more speaker based approach to controlling, designing and recalling speaker configurations; these are called Drive Modules. A Drive Module is the Processing provided by one Input DSP Block, and a number of Output DSP Blocks, which are associated with one-another by means of routing.
3.5 FIR Linear Phase Equalisation 3 INTRODUCTION AND KEY FEATURES this EQ is not linear phase, then the zones where the speakers combine may suffer frequency response anomalies. User Manual DMS48 V1.
A MENU BUTTONS The User Guide This user manual gives a progressively more detailed description of the functions of the APG DMS48 processor. A single page quick reference guide is provided for those users who are experienced with this type of equipment and just need to know how to drive the front panel. A detailed explanation of the front and rear panel controls and indicators is contained in the next section.
A.1 Front Panel A MENU BUTTONS even relatively low input signal levels. The 0 indicators are intended to show nominal operating level and can also be useful for setting system gain structure. A.1.3 Input Clip/mute Indicator The input clip/mute indicator CLP warns the user of either input mute or input overload at +19 dBu. The overload indicator will only come on when all other signal lights are illuminated. If the other lights are off, this indicator shows a muted input state.
A MENU BUTTONS A.1.9 A.2 Rear panel Limiter Indicators The limiter indicators are a collection of indicators which signal different information about the limiter status. The indicator shows signal presence and will illuminate when a signal above - is present in the output. The second indicator <-6dB> shows that the signal has reached 6dB below the limiter threshold. The third indicator signals that the threshold of that output channel has been reached.
B A.2.3 OPERATION Audio Output Connectors The processed outputs are impedance balanced, and wired; pin-1 directly bonded to ground as required by the AES48 standard, pin-2 hot and pin-3 cold. An unbalanced input may be driven by connecting pin 3 cold to the ground connection at the source end. When AES3 operation is selected on an output pair, the Odd channel connector is used for both channels (e.g. Input 1 is used for channels 1 and 2). A.2.
B OPERATION B.2 B.2 Drive Module Presets Drive Module Presets 1 bloc = Device 1 DSP input name Preset name and ID Output for DSP input affected to DSP input DSP input Figure 4: Main screen The DMS48 uses Drive Module presets, which are defined as a number of outputs driven from one DSP input. This system allows for better flexibility and greater functionality when loading and storing presets. Drive modules allow for a less processor centric and more speaker orientated system design.
B.4 Factory Presets B OPERATION A The DMS48 has 45 drive module preset locations and these can be stored and recalled from the pages, for the channel being viewed. To design a new crossover, press the desired or button to enter the pages where the parameters for each of the channels are shown. Once in these pages the up and down buttons will scroll through the parameters for the inputs/outputs through the signal chain.
C INPUT B.5 Storing Presets same way as the Factory Presets described above. These Presets are also usually locked but the user can name and store their own edited versions in any free preset location. B.5 Storing Presets A STOR Preset Name Preset1 23 ABCD Once a drive module has been created it can be stored by pressing the button until the edited channel is reached, then pressing the down button until store page is reached. Using encoder A will change the preset number.
C.2 Gain and Polarity C INPUT for AES3 operation, the AES3 indicator under the input meters will illuminate. So that the relative gain between an Analogue input and an AES3 input can be normalised, it is possible to adjust the gain of the AES3 channel using the Input Route AES3 Gain parameter. This device will automatically select the correct sample rate from the incoming stream between 28kHz and 108kHz. When the Digital Audio Network option (e.g.
C INPUT C.5 Parametric Equalisation its order as the filter becomes progressively steeper rather than following a linear slope so a dB/octave description is not accurate. C.5 Parametric Equalisation There are eight stages of equalisations available for each input channel, two shelving filters and six parametric filters. C.6 FIR Shelving EQ A FIR/ Preset1 Freq Gain 100Hz 0.
D OUTPUT Routing allows users to route any physical or digital signal to any DSP input. This is a matrix mixing system where all DSPs can be driven from any one input or pairs of inputs 1+2 or 3+4. Summed inputs have 6dB of attenuation so that a sum of largely similar programme material remains at the correct calibrated level. When a sum input is selected, the input DSP meters show the higher of the two inputs so that indication of the onset of clipping of either input is indicated. D D.
D OUTPUT D.5 D.5 LIR Crossover Filtering LIR Crossover Filtering Unique to APG, Linea Impulse Response (LIR) crossover filtering gives a Linear Phase crossover which has a constant delay regardless of frequency (unlike other types of crossover which delay different frequencies to a different extent, thus smearing the arrival time).
D.8 Routing E UTILITY PAGES non-VX mode, this delay will depend on the lowest high-pass frequency used in the crossover filters in a given Drive Module. In VX mode, the delay is related to the Split frequency. This delay will be applied to all of the outputs in a given Drive Module to keep them in phase. Also see Latency Delays on page 25. D.7.2 Tmax Thermal Limiter The Thermal Limiter is intended to protect the driver against damage due to over-heating.
E UTILITY PAGES E.3 E.3 Current Ethernet IP Address Current Ethernet IP Address U IP Curr 192.168 0 123 This may be viewed in The IP Curr page of the UTIL menu. This value cannot be edited. E.4 IP Mode The Ethernet IP address may be automatic Auto or may be a fixed static value Static as determined by the IP Mode page of the UTIL menu. Warning Do NOT use Static mode unless your IT system specifically requires it.
G F SNAPSHOTS Ethernet F.1 Ethernet configurations IP addressing in the Device can be completely automatic; No setup is required. When first installing and launching PWAPG, the computer Firewall may ask to allow PWAPG to access the network. Note: F.2 This must be allowed. DHCP There are two primary IP address ranges one used when there is a DHCP server present (e.g. a Router in the system), and another where there is no DHCP server (so the Device and the Computer will instead use ’Auto IP’).
H LATENCY DELAYS G.1 AUX Port the DMS48’s front panel, the first two snapshots are also recallable from the auxiliary port using a binary combination of pins. The parameters inside Drive Module Presets are not individually stored in Snapshots, so recalling a Snapshot will merely trigger the recall of the appropriate Drive Module presets, rather than restoring the parameters that were active when the Snapshot was stored.
H.1 Audio Network outputs H LATENCY DELAYS (1) This latency figure is calculated using the Vx Split frequency (in kHz). Analogue Input 0.385ms Analogue Output 0.402ms Input HiShelf FIR (On) 0.4ms Example: LIR Linear Phase crossover (Off) 0ms VxLim Limiter (VX mode on, 1KHzFsplit) 0.358ms Total 1.545ms Please note that the latencies within a Drive Module are equalised among outputs of that Drive Module.
I TECHNICAL SPECIFICATIONS I Technical Specifications • • • • • • • • • • • • • I.1 Input impedance >10kΩ balanced Output Imp <100Ω imp. balanced Max Input level +20dBu Max Output level +18dBu into 600Ω Sample rate 96kHz AES3 Input sample rate 28kHz 108kHz AES3 Output sample rate 96kHz Frequency Response 10Hz - 40kHz Input Dynamic range >120dBa Typ. Output Dynamic range >118dBa Typ. THD (20Hz-20kHz) <0.008% Typ. Mains required 85-230VAC 50-60Hz Mains power 30W Connectors • • • • • I.
DMS48 Synoptic view I.
APG France 19 Bis Rue des Ecoles - Site Valnor ZI Haute 95500 Le Thillay - RCS Pontoise 451935084 Tel : +33(0)1.30.18.92.70 - Fax : +33(0)1.30.18.92.71 E-mail : contact@apg.tm.fr - Site : www.apg-audio.
