manual ppa1200
Contents
1. SPEAKON NL4FC NS m Figure 3 10 PPA 1200 with 2 terminal loudspeaker connection If you don t want to use the DDC feature at all the DDC and the signal ground leads should be linked at the amplifier output in the speakon connector see figure 3 11 The DDC terminals can also be left unconnected but the performance will be less SPEAKON NLAFC Figure 3 11 PPA 1200 with 2 terminal loudspeaker connection ill SNOILO3NNOO PPA 1200 USER MANUAL stage accompany WARNING Never shortcircuit the DDC terminals and never connect the signal terminal to the DDC ground terminal or vice versa see figure 3 12 on the next page Since you are disabling the amplifier s feedback network signal gain will be almost infinite The smallest input signal will result in full power output with the possibility of square waves damaging your loudspeakers Therefore check your cables regularly We also advice you to use special Stage Accompany 4 wire loudspeaker cable 2 x 3 0 square millimeters and 2 x 0 75 square millimeters SPEAKON NLAFC 7 xS NA SPEAKON NLAFC m Figure 3 12 Dangerous PPA 1200 output connections n SNOILO3NNOO PPA 1200 USER MANUAL stage accompany When more speakers are going to be connected to one amplifier split the output and DDC lea2. because the output wiring might have to be changed see paragraph 3 3 4 11 Software Version As a result of Stage Accompany s policy of continuous development and improvement the software of the PPA is regularly updated To check which software version your PPA is provided with act as follows Reading the software version Press the lt READOUT SELECT key and keep it depressed Next press the channel 1 DOWN key for at least 1 second The software version installed in your PPA appears in the channel 2 display for example 2 4 see figure 4 2 Press the lt READOUT SELECT gt key to return to normal readout mode NOOO ODO OOO G Figure 4 2 PPA 1200 software version readout example 4 12 ID Code Each PPA has its own unique identity code This code is important when using a PPA in combination with a Personal Computer because the computer recognizes the PPA by its ID code However the ID code is also very important for you After hiring out or lending a PPA you can check whether the PPA returned is the correct one Furthermore the unique ID code in addition to the lock function provides extra protection against theft If you note the ID codes of your PPAs and report them to Stage Accompany in the event of theft the ID codes concerned will be circulated worldwide throughout the Stage Accompany dealer network This prevents trading of
3. 5 2 5 6 High Power Fuse BloWn 5 2 ake professor ayy d PPA 1200 USER MANUAL stage accompany 6 Recommendations for Optimum Use 6 1 7 PPA 1200 Specifications nr lI RET xe e xw xe Res 7 1 8 Security PUNCHON o Sin Routine iaa aaa 8 1 8 1 Resetting the System Lock and Lock Code 8 1 de il SIN3 INOO dO 3 18V 1 1 stage accompany PPA 1200 USER MANUAL 1 Quick Introduction to the PPA 1200 If you have to start using the PPA 1200 straight away and do not have time to read the complete manual make sure that you at least read the following Ensure that you have a reliable well earthed power source The required current for the PPA can be found in the table in paragraph 3 1 Connect the PPA to your signal sources via the AUDIO IN inputs Connect this PPA to other units via the AUDIO OU T gt outputs using short signal leads Connect your single signal source to the channel 1 input if you use the PPA in active crossover mode or bridge mode a NOLLINCOYLNI 321n0 IMPORTANT Due to the fact that the low frequency loudspeaker of the Blue Box has an polarity opposite to that of the PPA all other SA loudspeakers combination the Blue Box has to be switched to inverted phase or cross cables between PPAs and Blue Boxes have to be used f computer control is desired connect all PPAs with each ot
4. Cable Gauge mrn2 9 O0hms 15 25 30 40 60 100 160 27 16 14 10 07 04 0 3 cape 29 51 32 27 20 14 08 05 72 46 39 30 20 12 0 8 Length m 91 60 51 39 27 16 10 507109 72 62 48 33 20 13 100 17 2 124 109 87 62 39 25 Figure 3 16 Proportional power loss as a function of loudspeaker cable gauge and cable length n SNOILO3NNOO 2 papse yy qu f Lai stage accompany Cable Gauge mrn2 4Ohms 15 25 30 40 60 100 160 51 32 27 20 14 08 0 5 Cable 20 21 60 51 39 27 16 10 30 124 84 72 56 39 24 1 5 Length m 40 151 105 9 1 72 5 32 20 172 124 109 87 62 39 25 100 231 189 172 145 109 7 2 48 Figure 3 17 Proportional power loss as a function of loudspeaker cable gauge and cable length Cable Gauge mm2 2O0hms 7555 30 40 60 100 160 10 9 1 6 0 5 39 27 1 6 1 0 cable 3 15 1 105 91 72 51 32 20 Length 307 189 141 124 100 72 46 3 0 m 21 5 168 151 124 91 60 39 50 f 231 189 172 145 109 72 48 100 24 9 24 1 23 1 209 17 2 124 87 Figure 3 18 Proportional power loss as a function of loudspeaker cable gauge and cable length 3 15 PPA 1200 USER MANUAL n SNOILO3NNOO PPA 1200 USER MANUAL stage accompany 3 4 SAnet Connections SAnet uses a symmetrical two wire connection The advantage of a symmetrical connection is that common mode interference external i
5. However all the ground terminals ALWAYS have to be shortcircuited for proper bridge mode operation SPEAKON NL4FC CH1 ee Fi gi SPEAKON NL4FC CH2 Figure 3 14 PPA 1200 bridge mode to loudspeaker connections An indication of the proportional loudspeaker cable power loss can be calculated using the following formula where means multiply 100 Proportional Power Loss G R 0 034 L 27 O h L m il SNOILO3NNOO o PPA 1200 USER MANUAL stage accompany where the variables represent L cable length in meters G cable gauge in square millimeters R DC resistance of the loudspeaker s in Ohms This formula is based on the DC resistance in stead of the complex impedance of the loudspeaker s However the approximation can be used to get a good impression of the loudspeaker cable power loss Per loudspeaker impedance a table is shown in figures 3 15 to 3 18 with the proportional power loss given the loudspeaker cable gauge in square millimeters and the cable length in meters Cable Gauge mrn2 l Ohm 15 25 30 40 60 100 160 14 08 07 05 04 02 O Prin 27 16 14 10 07 04 03 307 39 24 20 15 10 06 04 Length iri 51 32 27 20 14 08 05 62 39 33 25 17 10 07 1001 109 72 62 48 33 20 13 Figure 3 15 Proportional power loss as a function of loudspeaker cable gauge and cable length
6. h x w x d mm PPA 1200 USER MANUAL 1x 700 W RMS into 16 Ohms 1 x 1200 W RMS into 8 Ohms 1 x 1800 W RMS into 4 Ohms otated at rear of amplifier Standby 100 W max output 3520 W 33 7 kg 19 inch rack mount 4 units high 17 3 inch deep without connectors 178 x 482 x 442 without connectors v 1 0 11 95 cai I SNOILVOlsIDAdS 7 3 stage accompany PPA 1200 USER MANUAL I SNOILVOlsIDAdS he ioe j stage accompany PPA 1200 USER MANUAL 8 Security Function This chapter contains the information of one security function You may remove this chapter from the manual for safety reasons 8 1 Resetting the System Lock and Lock Code This function allows you to unlock the PPA 1200 in case you have forgotten the lock code To do this depress the lt SA NET GROUND gt key while switching on the PPA The PPA will then be unlocked and the locking code set to 1 il NOILVINHO3NI TVILNAGIANOOD PPA 1200 USER MANUAL stage accompany PPA 1200 Programmable Power Amplifier FRONT VIEW INDIVIDUAL POWER SUPLIES O LEVEL O TEMPERATURE O AVERAGE POWER O PEAKPOWER O POWER AMP ON DELAY O CLIP O CLIP O POWER LIMIT O POWER LIMIT L3 O SIGNAL PRESENT O SIGNAL PRESENT READOUT SELECT Oo O PROGRAMMABLE POWER AMP ON POWER AMP ON POWER o Oo o O o Oo O O l STANDBY I STANDBY LOCKED ON LIFTED LIFTED AMPLIFIER INPUT GROUND UN OD INPUT GROUND UN OD SYS OCK BRIDGE MOD SY
7. performer 2 26 system The following versions are available Type Cabinet X over ch1 Hz X X over ch2 Hz SOIIWHOVSESI Standard M44 M47 15 1000 1000 V2 8 Master M49 15 1007 15 100 2 V10 8 Master M49 15 1000 1000 3 V11 8 Champion Cia 15 100 15 100 V14 8 Performer 24 26 P16 40 100 40 100 V16 0 Performer 27 29 P17 40 70 40 70 V17 0 Performer 24 26 P24 amp P26 100 1000 1000 1 V18 0 Performer 27 29 P27 amp P29 70 1000 1000 9 1 V19 0 Notes 1 No low pass filter for the high frequency is installed 2 The 100 Hz low pass filter has 6 dB octave slopes 3 24 dB octave Bessel filter including compensation for the Constant Directivity Horn 4 This version is intended as sub low in combination with the BB25 Blue Box 5 The 100 Hz low pass filter has 12 dB octave Bessel slopes As soon as the active crossover factory preset selection is entered the channel mode of both amplifiers is reset to lt STAND BY This is done to prevent damage to your loudspeaker system during selection The active crossover factory preset selection can be left by pressing the channel 1 or channel 2 UP key until the channel 1 or channel 2 maximum power becomes 30 Watts or more NOTE Once an active crossover factory preset has been selected each time an UP or DOWN key is pressed the displays sequencially show two indications low mid high LO MI HI and level or active crossover factory prese
8. 4 6 10 v 25 42 amp of 5 5 8 13 20 33 53 7 4 10 14 24 38 5 30 10 3 4 7 10 17 27 Figure 3 5 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable Jhe P eet Lai n SNOILO3NNOO stage accompany PPA 1200 USER MANUAL OV Cable Gauge mrn2 16 0 soar at mem 323 2 EN 16 No 4 8 5 m9 99 o 5 6 r 65 PPAs 6 5 54 9 ae mo 151 M ale gt n 2 3 10 3 32 Figure 3 6 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable Cable Gauge mm2 230V 1 5 2 0 4 0 one 10 0 16 0 33 55 68 132 220 353 2 v 28 4 65 no 176 s n iw 2 4 75 n8 No 8 ta 22 3 55 88 o 5 7 18 71 wai si m vs 5 13 51 a 5 no u m a a 6 w i s 10 3 9 ES 22 35 Figure 3 7 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable ae popit ayy d PPA 1200 USER MANUAL stage accompany AOV Cable Gauge mrn2 V 16 0 n an 240 384 2 192 CEN ROMAN Z o 5 7 12 77 PPAS 6 i 64 Q 7 5 55 z ANN NNNM NM M a 2 n ely 4 8 10 4 39 Figure 3 8 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable au EET PPA 1200 USER MANUAL st
9. Energy Control is a two fold protection against clipping and overload at average power and at peak power which maintains the complete dynamic range of the signal The micropro cessor continuously measures the output power of the amplifier and monitors both the average power and peak power All levels are compared with the pre and user programmed values of the AEC As soon as an overload is detected the volume is reduced in proportion to the amount of overloading au NOILONGOULNI As soon as the cause of the overload has disappeared the volume is gradually returned to its original value Attack and release times are independent of the type of overload and have been chosen in such a way that a virtually inaudible operation is guaranteed DDC Dynamic Damping Control is a special way of measuring the cone movement of a loudspeaker The voltage induced in the voicecoil is sensed and fed back to the amplifier s feedback circuit Hence a virtually infinite damping is achieved which results in an exceptionally tight sound reproduction Built in SA loudspeaker presets with crossover and protection For optimum performance the PPA can be used in combination with a number of Stage Accompany two and three way cabinets to form an active loudspeaker system For this purpose the PPA has a built in crossover and a number of so called crossover presets which are programmed with predefined low and high levels and optimum protection parameters The crossov
10. Y PPA 1200 USER MANUAL e stage accompany Published by Stage Accompany B V Training amp Documentation Anodeweg 4 1627 LJ Hoorn The Netherlands Copyright 1989 by Stage Accompany B V All rights reserved No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical without written permission from Stage Accompany except for the inclusion of brief quotations in a review First Printing September 1989 Printed in The Netherlands This manual is designed to provide information about the PPA 1200 Every effort has been made to make this manual complete and as accurate as possible But no warranty of suitability purpose or fitness is implied The information is provided on an as is basis Stage Accompany shall have neither liability nor responsibility to any person or entity with respect to any loss or damages in connection with or arising from the information contained in this manual IBM is a registered trademark of International Business Machines Corporation Yay PPA 1200 USER MANUAL stage accompany Stage Accompany PPA 1200 Programmable Power Amplifier User Manual abe paper d net Y stage accompany PPA 1200 USER MANUAL Published by Stage Accompany B V Training amp Documentation Anodeweg 4 1627 LJ Hoorn The Netherlands Copyright 1989 by Stage Accompany B V All rights reserved No part of this manual may be reproduc
11. a signal greater than 40 dBu is present at the input stage 5 2 Clipping of the Amplifier The CLIP indicator is active for at least 0 3 seconds if the output voltage of the amplifier clips against the supply voltage 5 3 Power Limiting The input signal for the amplifiers is reduced by the processor so that the peak and average power delivered to the loudspeaker do not exceed a preprogrammed save limit The maximum peak power has been factory set while the average maximum power may be adjusted by the user through the MAXIMUM POWER function see paragraph 4 3 Large signal peaks can be withstood by a loudspeaker and are transmitted without hindrance Thus the signal remains fast tight and transparent The protection needs to react quickly in unexpected situations for example in case of feedback However this is not a 10096 guarantee that the speaker cannot be damaged It is therefore important that the system is not used for too long at POWER LIMIT conditions the activation of the POWER LIMIT protection indicates a serious degree of overload he mm ii SYOLVIIONI Y stage accompany PPA 1200 USER MANUAL Explanation of the display messages 5 4 DOC Protection of the Amplifier The dc message is shown in the display whenever a direct current that would be dangerous for the loudspeaker is present at the output of the amplifier The DC protection disconnects the loudspeaker from t
12. press the SYSTEM LOCK gt key again the PPA is now locked No parameters can be changed It is however possible to call up various readings in the displays using the lt READ OUT SELECT gt key Unlock To unlock the PPA proceed as follows Press the SYSTEM LOCK gt key until an initiated unlock code with a value of 1 appears in the channel 1 display Now use the lt UP DOWN gt keys to set the correct unlock code i e the value entered previously in the locking procedure From 1 you can jump directly to 999 and lower numbers using the DOWN key After setting the correct value press the SYSTEM LOCK gt key again the PPA is now unlocked If an incorrect unlock code is entered the PPA remains locked and the figure 1 will appear in the display again indicating that your entry was incorrect The unlocking procedure can then be repeated EM Y stage accompany PPA 1200 USER MANUAL Resetting the System Lock and Lock Code This confidential information is given in paragraph 8 1 which may be omitted from this manual for safety reasons 4 10 Bridge Mode The PPA can be internally set for bridge mode operation by pressing the BRIDGE MODE switch for at least 1 second In bridge mode the yellow LED by lt ON gt will light and all functions are controlled by the channel 1 keys and display After bridge mode has been selected on or off both amplifiers of the PPA are set STAND BY
13. 2 seconds From 2 you can jump directly to 100 and lower values using the DOWN key m NOIL Vt3dO IMPORTANT To avoid overburdening the power supply ALWAYS adjust the two power amp on delays with a different value In a permanent installation such as in a discotheque etc this feature makes it possible to centralize the power supply of the PPAs so that it is not required to switch each unit on and off individually 4 5 Channel Mode Both amplifiers of the PPA start up in lt STAND BY mode the first time the PPA is used with the green LEDs on Using the CHANNEL MODE gt keys both amplifiers may be switched on separately whereby the red LED for lt POWER AMP ON comes on IMPORTANT To avoid overburdening the power supply NEVER switch both amplifiers simul taneously on After switching the amplifier s on the system waits five seconds before connecting the loudspeakers to the amplifier s Both amplifiers require this period to stabilize Subsequently the signal is gradually fed to the amplifier s using an automatic fade in The amplifiers of the PPA start up automatically in the POWER AMP ON mode if they were switched off the previous time while in the lt POWER AMP ON mode The system remembers the last mode After switching the system on the adjustable delay variable from 2 to 100 mm EM PPA 1200 USER MANUAL stage accompany seconds is counted down Subsequently the ampl
14. 3NNOO PPA 1200 USER MANUAL stage accompany The proportional mains voltage cable loss may not exceed 10 The following formula may be used to calculate the maximum mains cable length in meters where means multiply G V V Maximum Length ML 2400 N The three input variables are N number of PPAs supplied through the cable G cable gauge in square millimeters V mains voltage in Volts This means that the cable length is proportional to the cable gauge and the square of the mains voltage while it is inversely proportional to the number of PPAs supplied through the cable An example will explain the use of this formula N 4 4 PPAs connected G 2 5 cable gauge is 2 5 square millimeters V 220 mains voltage is 220 Volts G V V 121000 Maximum Length ML E 12 6 2400 n 9600 It follows that the maximum cable length is 12 6 meters On the next pages per mains voltage a table is shown with the maximum mains cable length in meters given the cable gauge in square millimeters and the number of PPAs supplied through the cable Warning gt In spite of the surge protection the current peak at power up can be up to three times the magnitude of the nominal required current Therefore never switch on multiple PPAs simulta neously Use the POWER AMP ON DELAY feature see paragraph 4 4 ae popit ayy d ill SNOILO3NNOO uy PPA 1200 USER MANUAL O
15. DU JL ii ii mii Figure 4 4 PPA 1200 signal present time readout example LL d i m NOIL Vt3dO Y stage accompany PPA 1200 USER MANUAL 4 14 Power Amplifier On Time The power amplifier on time of the PPA 1200 is defined as the time during which at least one of the power amplifiers has been in zPOWER AMP ON mode This power amplifier on time in hours has been reset off factory and can afterwards only be reset by a Stage Accompany dealer via the SAnet interface Reading the Amplifier On Time Press the lt READOUT SELECT key and keep it depressed Next press the lt SA NET GROUND gt key for at least 1 second The power amplifier on time in hours of your PPA appears in the channel 2 display for example 789 see figure 4 5 Press the lt READOUT SELECT key to return to normal readout mode 1 0000 UNO I0 Figure 4 6 PPA 1200 power amplifier on time readout example O 4 15 Activating the boot mode m NOIL Vt3dO The PPA is provided with an electrically reprogrammable software memory As a result it is possible to update the software via SAnet without having to open the casing To provide the PPA with new software the so called BOOT mode has to be activated The otage Accompany PC AT or any IBM compatible PC AT can then be used to upda
16. S ROUND A NET GROUND REAR VIEW CHANNEL 1 CHANNEL 2 WARNING ro REDUCE THE RIK oF FIRE oR FUSE S FOR CONTINUED PROTECTION AGAINST FIRE ELECTRICAL SHOCK DO NOT XPOSE THIS APPLIANCE HAZARD REPLACE ONLY WITH SAME TYPE FUSE TO RAIN OR MOISTURE 10 AT 250V CHANNEL 2 CHANNEL 1 OUTPUT OUTPUT C Y CAUTION vo terr pere sue po No s SOG STAGE ACCOMPANY rouw _ REFER SERVICING TO QUALIFIED SERVICE PERSONNEL PPA 1200 USER MANUAL stage accompany Trouble Shooting 1 e p joejuoo N NO pue 440 Buruunj 18e A yoO udue jueuudinbe J9ujo 199y9 punolb jouys Bu Aq N sieeddesip unu punosb ui9js s Bully Aq siesddesip unu T N AdO 9A9 indui Bulnes Aq siesddesip unu punoJB indui Bury Aq sie ddesip unu NI sjouueyo ujoq Auedoud pajoauuoo leuis jndul euBis jndino ul winy p uu paua uo dwe Jamod un N NT N I A indui jsnfpe pejoeuuoo redoud yndjno A U0 dwe Jamod 9pow euueuo Al wa s s yoojun 330 I A dul pay90 uiejs s N NT 9pouJ J9AO X JO eBpuq ul Z guueyo uo jndul NT qai jueseJd jeuBis Y ee s
17. age accompany 3 2 Audio Connections The XLR connectors audio in and audio link of the PPA are wired as follows Pin1 ground Pin2 normal phase or hot Pin3 inverted phase or cold Always use high quality XLR connectors and screened signal cables Using the output connectors up to 30 PPAs can be linked without problem If more than 30 PPAs need to be interconnected a separate signal driver should be used 3 3 Loudspeaker Connections Due to the DDC feature the PPA has 4 output terminals per channel instead of 2 The speakon connector is wired as follows Pin 1 signal or hot Pin 1 ground or cold Pin 2 DDC signal DDC or DDC hot Pin 2 DDC ground DDC or DDC cold For optimum performance the amplifier to loudspeaker connections should be made as shown in figure 3 9 SPEAKON NL4FC Figure 3 9 PPA 1200 with 4 terminal loudspeaker connection g wi D E rofessionalo ill SNOILO3NNOO PPA 1200 USER MANUAL stage accompany The signal and DDC signal Dynamic Damping Control terminals are linked together at the loudspeaker hot terminal The ground and DDC ground terminals are linked at the loudspeaker cold terminal A maximum damping is obtained with these connections If your speaker system is not prepared for a four terminal connection link the DDC and the signal ground leads at the input of the enclosure see figure 3 10
18. be read from the memory Y stage accompany PPA 1200 USER MANUAL Ifthe PPA is in active crossover mode you do not have to adjust both low and high levels They are automatically set with the correct proportion when you select a loudspeaker system In the other modes press both lt UP gt keys of channel 1 and channel 2 and keep them depressed The values in the displays increase from OFF via 59 dB to 0 dB completely open However O you may adjust the level of both amplifiers independently 5 Any earth hum that may be present may be cured with the lt INPUT GROUND gt keys Z the lt SYSTEM GROUND gt key or if connected the lt SA NET GROUND gt key O he use of the lt SYSTEM LOCK gt key is not directly necessary for the function of the e PPA For further information see paragraph 4 9 O The PPA 1200 is now ready for use Z he profesiona stage accompany PPA 1200 USER MANUAL 2 Introduction The Stage Accompany PPA 1200 is a dual channel high power microcomputer controlled amplifier and comprises the following components e Balanced input stages High and low pass filters per channel with 6 24 dB octave slopes Two amplifiers which each deliver 350 Watts RMS into 8 Ohms 600 Watts RMS into 4 Ohms and 900 Watts RMS into 2 Ohms Microcomputer for control and protection of the unit e High speed computer interface SAnet for control via an IBM compatible Pe
19. creases or decreases respectively with increasing speed If you depress both lt UP DOWN gt keys simultaneously the level of the concerned amplifier is set to OFF However in active crossover mode see next paragraph the level of both amplifiers is set to lt OFF gt This works as an emergency stop NOTE If you are free to choose the level input attenuation select 0 dB In this way the chance of overloading the input stage is minimal The input accepts any level up to 20 dBu 4 3 Maximum Power and Active Crossover Presets When you select MAXIMUM POWER with the lt READOUT SELECT key you may adjust the maximum delivered average output power at which the amplifier starts to reduce its output signal This power can be adjusted between 30 Watts and 900 Watts in steps of 10 Watts using the lt UP DOWN keys He mm ci m NOIL Vt3dO Y stage accompany PPA 1200 USER MANUAL Both lt UP DOWNP keys may also be used to select an active crossover factory preset to form an active loudspeaker system Selecta maximum power equalto 30 Watts and keepthe channel 1 or channel 2 DOWN key pressed to enter the active crossover factory preset selection The built in crossover has Bessel slopes Besides the crossover a built in rumble filter with a cut off frequency of 15 Hz and 24 dB octave Bessel slope becomes active In case a factory preset is selected the display will indicate which e g PERF 2 26 for a
20. ds as soon as possible behind the output terminals see figure 3 13 on this and next page SPEAKON NL4FC eS A S S Figure 3 13 PPA 1200 connections to several enclosures il SNOILO3NNOO PPA 1200 USER MANUAL stage accompany SPEAKON NL4FC il SNOILO3NNOO The amplifier can cope with any load of 2 Ohms or higher This means that you may connect a maximum of two 4 Ohms four 8 Ohms or eight 16 Ohms loudspeakers per channel in parallel Linking the loudspeakers from one enclosure to another has two major disadvantages 1 The loudspeaker cable from the amplifier to the first enclosure conducts the current for all enclosures which means extra losses 2 The DDC only works for the first enclosure oplitting the leads at the amplifier output terminals solves these problems see figure 3 13 The DDC system corrects the performance loss due to connectors loudspeaker cables and so on However it cannot prevent loss of power So only use cables of minimal 2 x 1 5 square millimeters or more for the loudspeaker leads and 2 x 0 75 square millimeters for the DDC leads 2 papse ayy d PPA 1200 USER MANUAL stage accompany For bridge mode operation the correct connections are shown in figure 3 14 For the connection of the signal terminals you may use the options previously described according 2 channel operation
21. ed or transmitted in any form or by any means electronic or mechanical without written permission from Stage Accompany except for the inclusion of brief quotations in a review First Printing September 1989 Printed in The Netherlands This manual is designed to provide information about the PPA 1200 Every effort has been made to make this manual complete and as accurate as possible But no warranty of suitability purpose or fitness is implied The information is provided on an as is basis Stage Accompany shall have neither liability nor responsibility to any person or entity with respect to any loss or damages in connection with or arising from the information contained in this manual IBM is a registered trademark of International Business Machines Corporation stage accompany PPA 1200 USER MANUAL Table of Contents Quick Introduction to the PPA 1200 Introduction Connections Operation Indicators Recommendations for optimum Use of the PPA 1200 Technical Specifications Trouble Shooting O Y stage accompany PPA 1200 USER MANUAL Table Of Contents i m 1 Quick Introduction to the PPA 1200 1 1 S O 2 IntrOdUCHON caninas d Len et 2 1 z 3 Connection of the PPA 1200 3 1 T 3 1 WAI SOW Glico datis das a t io di RR Me d 3 1 mM 3 2 AUGIO Gon eecllollS macer cette EXP eee bee eL RES 3 8 3 3 Loudspeaker Connectio
22. eplace a blown fuse only with a new one of the same value PPA 1200 USER MANUAL stage accompany 6 Recommendations for Optimum Use Ensure that the mains supply is of a good enough quality and that it can supply the re quired peak current values In addition a good earthing is necessary to prevent noise hum and safety problems If hum does occur it can almost always be cured using the ground lift keys All programmed settings of a PPA are automatically saved in memory Therefore any changes you may make do not have to be saved separately When a PPA is switched on after first use all parameters will be adjusted to the last programmed values As a result PPAs used as part of a fixed set up only need to be programmed once NOTE After a software update all settings are erased and the PPA concerned has to be reprogrammed Be sure that the PPA is built into a space with sufficient circulation of fresh air A tem perature that is constantly too high leads to switching on and off of the protection and considerably reduces the lifetime of the amplifier As noted earlier the POWER LIMIT function is a sort of emergency measure Con sidering that the processor is much faster than the user the system can react appropri ately and quickly to unexpected situations It is recommended that you trace the source of overload and remedy it as soon as possible Just to reiterate the POWER LIMIT function does not o
23. er Is always activated in preset mode in which channel 1 can be a low or midfrequency amplifier and channel 2 a low or high frequency amplifier Temperature peak and average output power readout True peak and average output power are measured and displayed in Watts for each channel Furthermore the temperature of the power amplifier output semiconductors is displayed per channel in degrees Celcius C 2e pap y d Y stage accompany PPA 1200 USER MANUAL SAnet Interface The SAnet Interface is a computer interface developed by Stage Accompany that can be used for monitoring and control of automated sound systems Apparatus equipped with an SAnet Interface such as the Blue Box PPA 1200 Programmable Amplifier and PPE 2410 Program mable Parametric Equalizer can be connected to a Personal Computer allowing remote monitoring and control All parameters ofthe individual units can be programmed and monitored from the PC Furthermore the apparatus such as PPAs can be grouped as desired and then controlled groupwise The maximum communication distance using the correct type of cable is 500 meters Z SAnetis a genuine communication system data transfer occurs bi directionally along the same S line This is in contrast to for example MIDI MIDI has separate in out and thru provisions and c cabling restricting communication to only one direction The transmission speed of MIDI is I approximately 32 kB s that of SAn
24. ery situation SUCCESS AJ m O O lt lt ITI lt UO gt 4 O lt o profesiona stage accompany 7 PPA 1200 Specifications Input Maximum input level Input impedance Common mode suppression Frequency range Gain Channel separation Two way crossover point Total harmonic distortion THD Intermodulation distortion IMD oignal noise ratio Slew rate Damping with DDC Power delivered PPA 1200 USER MANUAL 6 dBm reference 0 dBm 0 775 V full output in 4 Ohms 20 dBm 24 kOhms each leg 30 kOhms unbalanced 70 dB 1 kHz 65 dB 20 kHz 20 Hz 20 kHz 0 3 dB 9 300 W into 8 Ohms 5 Hz 80 kHz 3 dB 300 W into 8 Ohms 32 30 dB 80 dB 9 1 kHz 300 W into 8 Ohms 60 dB 9 20 kHz 300 W into 8 Ohms 1 kHz 24 dB oct Bessel lt 0 0896 20 Hz to 20 kHz load gt 2 Ohms at all powers 1096 below clip level lt 0 00896 1 kHz 200 W into 8 Ohms lt 0 01596 20 kHz 200 W into 8 Ohms lt 0 00896 1 kHz 1 W into 8 Ohms lt 0 0196 200 Hz to 20 kHz with F1 70 Hz 4 1 200 W into 8 Ohms I SNOILVOlI3I23dS 110 dB 40 V us 10 000 1 kHz 10 V into 8 Ohms 2 x 180 W RMS into 16 Ohms 2 x 350 W RMS into 8 Ohms 2 x 600 W RMS into 4 Ohms 2 x 900 W RMS into 2 Ohms Y stage accompany Bridge mode power delivered Mains supply voltage Continuous power consumption Weight Housing Dimensions
25. et is 375 kB s more than 10 times as fast O SAnet and MIDI are not compatible m For the application of SAnet see paragraph 3 4 of this manual 26 profesiona PPA 1200 USER MANUAL stage accompany 3 Connection of the PPA 1200 Only three connections need to be made mains power audio input signals and loudspeaker leads An SAnet connection is not necessary for normal stand alone functioning of the PPA 3 1 Mains Power The PPA is set for 220 V 50 Hz unless otherwise stated at the back of the amplifier Always ensure that you use a correctly grounded power supply If more than one PPA is to be used it is advisable to connect each one separately to the nearest mains supply instead of connecting several PPAs using an adaptor block see figure 3 1 PPA 1200 PPA 1200 Mains Supply ul LI LJ PPA 1200 SA PPA 1200 PPA 1200 PPA 1200 Mains Supply m Figure 3 1 PPA 1200 connections to the mains supply The m n SNOILO3NNOO PPA 1200 USER MANUAL stage accompany This prevents unnecessary power loss in the cabling If circumstances do not allow this it is advisable to connect the adaptor block directly to the power supply using a short cable and then connect the individual PPAs to it using longer leads Although this method is not ideal it does limit power loss as much as possible Ultimately it is poss
26. ffer a 100 guarantee against damaging the loudspeakers It is however an excellent aid in preventing problems such as distortion s SNOILVQNAWINODSY The excellent sound quality of the PPA greatly depends on the correct adjustment of the various system parameters You are therefore advised to lock the PPA as soon as possible after setting the desired parameters so that it cannot be interfered with by unauthorized personnel Of course it is just as important that you remember the lock code you entered A faulty fuse must ALWAYS be replaced with a new one of the same value A fuse of a different value can cause permanent damage to the microcomputer Always discon nect the PPA from the power supply before operating on the fuse holders Repairs to the PPA should only be carried out by an authorized Stage Accompany dealer Never dismantle the PPA yourself because you risk damaging vital compo nents moreover the guarantee becomes irrevocably invalidated Read this manual carefully As you go try out the various functions described in this manual in this way you will soon become familiar with the many possibilities that the PPA offers t is just as important that your colleagues who will use the PPA also read the manual ake papse y l i PPA 1200 USER MANUAL stage accompany With a good knowledge of the working of the PPA it is possible to fully utilize its supe rior sound quality in ev
27. he amplifier while the signal to the amplifier is switched off After five seconds provided that the direct current has disappeared the signal is supplied again and the connection to the loudspeaker is reactivated In case of permanent DC examination and repair by an official Stage Accompany dealer is necessary 5 5 Overheated Amplifier The fan is switched to high speed whenever the temperature of one of the amplifiers reaches more than 50 degrees Celcius 50 C The fan is switched to low speed again after the temperature has dropped below 45 C The lt HEAT gt message is alternately shown with the temperature in the display whenever the temperature of the amplifier reaches more than 85 degrees Celsius 85 C The processor switches the signal of the amplifier off at this temperature allowing the output devices to cool down The signal is switched on again after the temperature has dropped below 80 C If after switching off the signal the temperature continues to increase the high power supply is switched off after a temperature of more than 90 C has been reached The power supply is switched on again after the temperature has dropped below 80 C ii SYOLVIIONI 5 6 High Power Fuse Blown The FUSE message is shown in the display whenever the high power fuse of the correspond ing amplifier at the rear of the PPA has blown WARNING Always disconnect the PPA from the power supply before operating on the fuse holders R
28. her via lt SANET IN and SANET OUT e Switch the PPA on using the POWER ON OFF gt switch If you want to use the PPA in active crossover mode use the lt READOUT SELECT key to display the MAXIMUM POWER gt The LED next to the word Maximum power will light up the displays register 900 this is only true the first time the PPA is switched on or after a reset normally the last set values will be read from the memory Press the lt DOWN gt key of channel 1 and keep it depressed The value in the display decreases from 900 to 30 Below 30 is a sequence of Stage Accompany loudspeaker systems Select the desired system using the channel 1 UP or lt DOWN key An overview of the various active crossover presets can be found in paragraph 4 3 If you want to use the PPA in bridge mode press the BRIDGE MODE gt key and keep it depressed for at least 1 second until the channel 2 display and indications are disabled and the BRIDGE MODE gt LED lights up The bridged amplifier can now be controlled using the channel 1 controls e Switch both channels of the PPA from lt STAND BY gt green LED lit to lt POWER AMP ON gt red LED lit using the CHANNEL MODE gt keys Use the lt READOUT SELECT gt key to display the lt LEVEL gt The LED next to the word Level will light up the displays register OFF this is only true the first time the PPA is switched on or after a reset normally the last set values will
29. ible to place the adaptor block near a PPA but if a great deal of power is required from the unit the final current provided is far from optimum loss of current leads to unrecoverable loss of sound pressure WARNING Always disconnect the PPA from the power supply before operating the fuse holders Replace a blown fuse only with a new one of the same value Current Table Below the current consumption of the PPA is tabulated for various mains voltages The power consumption shown applies to full output power 2 x 900 Watts into 2 Ohms However the power consumption will be generally less than the shown one specially when your speaker system has an impedance of 4 or 8 Ohms No Power Mains Voltage V PPAs Required VA 100 110 120 200 220 230 240 Current Consumption A 1 3520 35 32 29 17 16 15 14 2 7040 70 64 58 35 32 30 29 3 10560 105 96 88 52 48 45 44 4 14080 140 128 117 70 64 61 58 9 17600 176 160 146 88 80 76 13 6 21120 211 192 176 105 96 91 88 24640 246 224 205 123 112 107 102 8 28160 281 256 234 140 128 122 117 9 31680 316 288 264 158 144 137 132 10 35200 352 320 293 176 160 153 146 The stability of the mains voltage is very important because the PPA contains a microcomputer The mains voltage may NOT deviate more than 2096 of the nominal mains voltage To avoid damage to critical parts the PPA shuts itself off if the mains voltage drops below 80 of its nominal value ill SNOILO
30. ifier s automatically switch es to lt POWER AMP ON mode The signal is fed to the amplifier s five seconds after switching to the lt POWER AMP ON mode Even after a power failure the PPA starts up in the way described above The PPA is protected against power failures and fast switching on and off It is not necessary to set the level of the amplifiers to OFF before switching the system off as the system is protected against signal spikes The adjustment of the power on delay is described in the previous paragraph 4 6 System Ground Lift If hum or another strange sound is audible after switching on an amplifier of the PPA the cause may be incorrect earthing of your sound system The SYSTEM GROUND gt key can be used to lift the connection between the system earth and the mains earth This action alone is often mains supply chossis syslem Y MAINS ground d syslem groun groundlift 0 ow 9 0 groundlift groundlitt input sAnet Figure 4 1 The various ground connections of the PPA 1200 sufficient to eliminate the undesired noise caused by a dirty supply If you activate the SYSTEM GROUND the yellow LED by lt LIFTED gt will light If the hum does not disappear after lifting you should try to lift other grounds with the lt SA NE T GROUND key or lt INPUT GROUND gt keys see next paragraphs or search for the ca
31. ithout differentiation between left and right in a stereo set up SAnet is a communication network that is separate from the audio signal route and therefore has no influence on the sound and or stereo image n SNOILO3NNOO stage accompany PPA 1200 USER MANUAL 4 Operation After connection to the correct mains voltage the PPA 1200 is switched on usingthe lt POWER gt switch The first time or after for example the software has been updated both channels will start up in lt STAND BY gt mode The various functions of the system will now be described one after one It is advisable to practise the various functions and operations described in this manual with a PPA 4 14 Readout Select This key is used to make a choice from six different readouts Input sensitivity of the amplifiers in dB LEVEL Temperature of the power amplifiers in C TEMPERATURE e Average power delivered in Watts lt AVERAGE POWER Peak power delivered in WattscPEAK POWER Maximum average power delivered in Watts zMAXIMUM POWER gt Power amplifier on delay in seconds lt POWER AMP ON DELAY gt 4 2 Level When you touch an lt UP DOWN gt key and the lt READOUT SELECT gt is not equal to lt MAXI MUM POWER or POWER AMP ON DELAY gt the display automatically jumps to LEVEL The range of LEVEL is from OFF via 59 dB to 0 dBm in steps of 1 dB If you keep an UP or DOWN key depressed the level in
32. ns 3 8 3 4 SANEU CONNECIONS 224 222 ante Ibo RS Ser ub me her ate ce weer 3 16 4 ODeFatoli x son uri waq Back a g uang ab seta anos 4 1 4 1 Readout Select ts oss tapuwaq a dp ee dev M pe los 4 1 4 2 BOVO sata pasa aaa e pauk otc ios dre toit ane a reae fo utes 4 1 4 3 Maximum Power and Active Crossover Presets 4 1 4 4 lower Amp ON DEV s us dod whee eth eed ee d aes Se Rb ddr 4 3 4 5 Channel MOGG x ovis ud ono seg ee soka ooa A Roy doen 4 3 4 6 System Ground Lift ad ados gd id re Da ES 4 4 4 7 SA et around lts e 4 5 4 8 E AAA sua usa eae mal ode Suay 4 5 4 9 System LOCK UNIOCK ix uus Tapu y mama Fa s QURE 2E aa Cate 4 5 4 10 PIO OS VIO Sie uuu uz it add a 9 deos a dee o Su ua S iode t aa 4 6 4 11 SOnWale Versi atrial Paare E bdo PEE EET 4 6 4 12 ID GOdG 25 2 FEREeP 255 65 amas he ct oe ded p aee d bei 4 6 4 13 Signal Present fime _ _ _ 4 7 4 14 Power Amplifier On Time 4 8 4 15 Activating the boot mode 4 8 5 INGICAIONS x52 930 3S RR a POSSE ae Uode a 5 1 5 1 Input signal Present s 2 45 9 acero E Querido Doi dod sas asada 5 1 5 2 Clipping of the Amplifier 5 1 9 9 momen MET 5 1 5 4 DC Protection of the Amplifier _ 5 2 5 5 Overheated Amplifier
33. nterference such as power up peaks from other equipment radio interference and interference from light dimmers has less influence on the signal You are advised to use two wire coaxial cable known as twinax as the connecting cable If the system is not going to be used under extreme circumstances well screened microphone cable may be sufficient The maximum cable length is approximately 500 m when using twinax and 250 m when using screened microphone cable The required connector is of the 4 pole XLR type such as the Neutrik NC 4 FC female or NC 4 FRC female angled and the NC 4 MC male or NC 4 MRC male angled These connectors are mechanically very robust currently popular and readily available at your local suppliers The XLR connectors SAnet in and SAnet out of the PPA are wired as follows INPUT Pin1 ground screening pm Pin2 5 V for future use of remote control a y Pin3 SAnet in phase or hot Pin4 SAnet out phase or cold Using the output connector a maximum of 250 units PPAs and or other equipment with an SAnet interface can be linked to SAnet SAnet and other communication systems such as MIDI are NOT compatible Therefore never make a connection between SAnet and MIDI equipment If you do it can result in damage to your equipment For the sake of clarity ALL PPAs that are part of a sound system can be connected with each other via SAnet w
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35. rsonal Computer Individual power supplies provide for an excellent channel separation and availability of the maximum power at all times The functioning of the PPA is controlled and monitored by the built in microcomputer Via the oAnet interface the system can be controlled remotely by the Stage Accompany PC AT or any IBM compatible PC AT A maximum of 250 PPA 1200s can be controlled at distances of up to 500 meters Note The PPA performs excellently without a PC and or interconnection via SAnet The SAnet interface is a standard provision that enables groupwise operation but does not need to be used The audio input and output are connected internally without electronics This is done to prevent any loss of quality With an input impedance of 24 kohms it is possible to connect a maximum of 30 PPAs with each other If more than 30 units need to be connected to each other a separate signal driver must be used The PPA is protected against the connection of speaker impedances less than 2 Ohms or even shortcircuiting of the output The output current is limited but the amplifier keeps working au NOILONGOULNI Y stage accompany PPA 1200 USER MANUAL The PPA has a number of unique features including AEC Auto Energy Control DDC Dynamic Damping Control Built in SA loudspeaker presets with crossover and protection Temperature peak and average output power readout e SAnet interface AEC Auto
36. stage accompany Do not switch the PPA lt CHANNEL MODES gt on off very frequently within a short time This causes the surge protection NTC to warm up decreasing its resistance so that the power up peak current increases DOV Cable Gauge mm2 15 25 40 60 100 160 0 V 2 4 6 2 3 5 8 13 2 33 3 2 3 8 14 22 NO 4 2 3 4 10 17 3 of 5 2 3 5 8 13 z PPAS 6 2 2 4 7 11 X 8 2 3 5 8 10 2 3 4 7 Figure 3 2 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable Cable Gauge mm2 10V 9 2 5 4 0 6 0 10 0 16 0 8 2 3 5 8 2 4 6 1 15 25 40 27 Noa 2 3 s b 15 o of 5 2 3 4 10 16 2 4 12 of 1 2 3 9 10 Z o 5 8 Figure 3 3 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable y putt peal Mp stage accompany uy PPA 1200 USER MANUAL 20V Cable Gauge mm2 15 25 40 60 100 160 L 1 2 3 0 96 2 5 8 I 18 30 48 o a 2 4 o 9 15 2 o 5 2 3 5 7 12 19 PPAS 6 2 3 4 6 10 16 7 2 3 5 9 14 5 8 12 i 10 2 2 4 6 10 Figure 3 4 Maximum cable length as a function of the cable gauge and the number of PPA s supplied through the cable Cable Gauge mm2 200V 1 5 2 5 4 0 6 0 10 0 16 0 267 2 133 s 8 1 2 3 56 8 vo
37. stolen PPAs since the ID code cannot be changed m NOIL Vt3dO Y stage accompany PPA 1200 USER MANUAL Reading the ID Code Press the lt READOUT SELECT gt key and keep it depressed Next press the channel 1 lt UP gt key for atleast 1 second The ID code of your PPA appears in the channel 2 display for example 123 see figure 4 3 Press the lt READOUT SELECT gt key to return to normal readout mode HOOO OURO JOUL Cu OD O Figure 4 3 PPA 1200 ID code readout example 4 13 Signal Present Time The signal present time of the PPA is defined as the time during which the input signal level of either channel has been greater than 40 dBu This signal present time in hours has been reset off factory and can afterwards only be reset by a Stage Accompany dealer via the SAnet interface Reading the Signal Present Time Press the lt READOUT SELECT gt key and keep it depressed Next press the channel 2 DOWN key for at least 1 second The signal present time in hours of your PPA appears in the channel 2 display for example 456 see figure 4 4 on the next page Press the lt READOUT SELECT key to return to normal readout mode NOTE The separate signal present times per channel can be read out following the above procedure with the corresponding lt INPUT GROUND gt key in stead of the channel 2 lt DOWN gt key CC
38. t name depending on readout select After power up all three indications are sequencially shown for 20 seconds m NOIL Vt3dO Y stage accompany PPA 1200 USER MANUAL 44 Power Amp On Delay The automatic switching to lt POWER AMP ON mentioned earlier occurs after a programmable time delay The aim of this function is to allow a number of PPAs to automatically switch to POWER AMP ON mode one after another with a time interval so that the mains supply is not overburdened If a number of PPAs are switched on simultaneously without using the mains power switch for example placing the plug in the socket or when power returns after a power failure this feature prevents melting of the fuses which would otherwise occur because of the high peak current The switch on current of the high power supply of the PPA can be more than three times its nominal current It is easy to imagine what will happen if for example four PPAs are switched on simultaneously The POWER ON DELAY gt removes the need for switching switching off and then again on all the POWER ON OFF gt switches of the PPAs after for example a power failure The POWER AMP ON DELAY gt is set as follows Select POWER AMP ON DELAY gt readout with the lt READOUT SELECT key The default values for the delays of both amplifiers are respectively 2 and 4 seconds Using the lt UP DOWN gt keys these values can be set between 2 and 100 seconds in steps of
39. te the software via SAnet To activate the BOOT mode press both SYSTEM GROUND gt key and SA NET GROUND gt key while switching on the PPA until the displays show see next page E THEE EI MU LILILILU DEDO Figure 4 5 PPA 1200 boot mode readout The running lt READOUT SELECT gt LEDs indicate that the BOOT mode is active The P in the channel 2 display shows that the PPA already has software installed P from Programmed If the software memory is empty or defective the display will show E E from Empty Contact your dealer for more information about updating the PPA via SAnet using the Stage Accompany PC AT or any IBM compatible PC AT stage accompany Me 4 9 PPA 1200 USER MANUAL m NOIL Vt3dO opt d om stage accompany PPA 1200 USER MANUAL 5 Indicators A number of indicators per channel are provided on the front of the PPA which can be divided Into LED indications and display messages LED indicators Indication e Input signal present indicator SIGNAL PRESENT gt e Clipping of the amplifier CLIP Power limiting POWER LIMIT Display indicators Message DC protection of the amplifier lt dc gt Overheated amplifier lt HEAT gt High power fuse blown FUSE Explanation of the LED indicators 5 1 Input Signal Present The SIGNAL PRESENTS indicator is active whenever
40. use elsewhere in the sound system In this case systematically check all other components being qu Pa m NOIL Vt3dO Y stage accompany PPA 1200 USER MANUAL used such as effect racks mixing desk etc Moreover to aid in preventing such interference itis advisable to keep signal cables well away from power cables and cables from for example lighting equipment Figure 4 1 illustrates the various ground connections 4 7 SAnet Ground Lift The connection between the incoming SAnet earth and the system earth can also be lifted using the lt SA NET GROUND key In this case the yellow LED by lt LIFTED gt will light 4 8 Input Ground Lift The connection between the incoming signal earths and the system earth can also be lifted using the lt INPUT GROUND gt keys In this case the yellow LEDs by lt LIFTED gt will light 4 9 System Lock Unlock To prevent unauthorized or undesired changes to system settings the PPA is provided with a SYSTEM LOCK gt facility in the form of a 3 digit lock code System Lock To lock the system do as follows m NOIL Vt3dO Press the SYSTEM LOCK gt key until an initiated lock code with a value of 1 appears in the channel 1 display The desired numeric code can now be programmed using the channel 1 lt UP DOWN gt keys Any value between 1 and 999 can be selected From 1 you can jump directly to 999 and lower numbers using the DOWN key Now
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