manualshive.com logo in svg

Nexo NX241, User Manual

Share
Download
Nexo NX241 User Manual Download Page 26

PAGE 

24/24  

  

 TECHNICAL 

SPECIFICATIONS  

USER MANUAL  LOAD1_80 
DATE: 30/08/00 12:48 

 

TECHNICAL SPECIFICATIONS 

SPECIFICATIONS 

NX241 Digital TDcontroller 

Output Level 

+28 dBu Max. into 600 Ohms load 

Dynamic Range 

Channels 1 & 2 = 99 dBu 
Channel 3 & 4 = typical 107 dBu. (Flat without gain 
scaling: 101dBu) 

THD + Noise 

< 0.02% flat setup (max0.04% for Output 27.5dBu) 

Latency time 

1.4ms on a flat setup 

Power Supply 

115/230 Volts 50/60 Hz (operating range 90-125V & 180-264V) 

FEATURES 

 

Audio Inputs 

2 Audio Inputs 24 bit converters  
Electronically Balanced, 36 k Ohms. 
2 XLR-3F Connectors. 

Sense Inputs 

4 Amplifier Sense Inputs (LF mono, MF/HF L&R) 
Floating 150 k

Ω

. 18 bit converters 

8 Pole Removable Strip Terminal. 

Audio Outputs 

4 Audio Outputs. 24 bit converters 
Electronically balanced, 50 Ohms 
4 XLR-3M connectors  

Processing 

24 bit data with 48-bit accumulator. 100MIPS 
Optional Expansion Board 300MIPS 

Front Panel 
 

Menu A and Menu B buttons 
16 characters by 2 lines display 
Select Wheel & Enter button (

!"

) 

IN Clip – DSP Clip red LED’s  
Speaker Protection yellow LED for each channel 
Individual Mute/Solo buttons and red LED for each channel 
Amp. Sense & Peak (green & red) LED’s for each channel 

FLASH EPROM 

Upgrade for software improvement, new cabinet set-ups 
available on NEXO web site. 

Rear Panel 

115/230 V switch  
Fuse holder 
RS232 connector for serial com. 
Empty slot for extension card (communication & processing 
power) 

Dimensions & Weight 

1U 19" Rack - 230 mm (9") Depth. 
4 kg  

 

Summary of Contents for NX241

Page 1: ...NX241 DIGITAL TDcontroller User Manual ...

Page 2: ...sts EN61000 4 2 Immunity to fast electrical transients sense input RS232 link and AC inlet EN61000 4 4 Safety Warning Safety Warning Safety Warning Safety Warning This unit is fitted with 3 pin IEC standard power socket For safety reasons the earth should not be disconnected To prevent shock or fire hazard do not expose the unit to rain or moisture To avoid electrical shock do not remove covers Da...

Page 3: ...INVERSION 8 AUDIO INPUT OUTPUT 8 GENERAL FUNCTIONS 9 MENU USER UTILITIES 11 MAIN FAMILY SELECTION 11 USER SETTINGS 12 SYSTEM SETTINGS 14 CONFIGURATION SELECT 15 VOLTAGE SELECTION AND FUSES 16 PRECAUTIONS 16 POWER CONNECTION 16 115 230 SWITCHING 16 DOWNLOAD 17 WARNING 17 INSTRUCTION 18 PROTECTION INFORMATION NOTES 20 PROTECTION 20 SOME WORDS ON AMPLIFIERS 22 POWER 22 CURRENT RATING 22 AMPLIFIER GAI...

Page 4: ...A B buttons at A C power up or during device RESET accesses the system change menu Keep the A B Buttons until all LEDs light off This will enable the selection of any cabinet in any family Using the rotary encoder scroll through the configurations and press enter to load the required settings Select your cabinet set up In MENU 3 0 you will be able to choose among the different set ups within the s...

Page 5: ...the S2 cabinet crossover 63Hz 4 S2 cabinets S2 80Hz Configures all four channels to drive the S2 cabinet crossover 80Hz Alpha E Family AlphaE STEREO Configures 2 passive Alpha EM 2 B1 18 or 2 Alpha EF in stereo ALPHAE Mono AEM B1 18 S2 63 Configures one passive Alpha Em with one B1 18 bass and one S2 Sub crossover 63Hz ALPHAE Mono AEM B1 18 S2 80 Configures one passive Alpha Em with one B1 18 bass...

Page 6: ...put Clipping Red Menu User Utilities p 11 Main Menu A selection Mute Solo buttons p 11 Menu User Utilities p 11 Rotary encoder Display Indicators p 11 Peak limiting Red Protection Yellow Sense signal Green Menu User Utilities p 11 SUB Menu B selection Menu User Utilities p 11 Swap Channels A B Display Indicators p 11 DSP Clipping ...

Page 7: ...t BALANCED OUTPUTS 4 3 2 1 HIGH R HF HIGH L MF LOW R LF LOW L SUB RS232 SENSE INPUT 4 3 2 1 FUSES BALANCED INPUTS RIGHT AUX SUB LEFT FULL RANGE Balanced Audio Input p 8 Balanced Audio Output p 9 Sense lines p 9 Voltage selection and fuses p 18 1 IEC Socket 2 Power ON OFF 3 Fuse Holder Voltage selection and fuses p 16 Fuse Type Rating 1 2 3 ...

Page 8: ...DC n 4 analogue outputs balanced 24 bit resolution DAC n 4 sense inputs unbalanced 18 bit resolution ADC Set up configurations possible n STEREO PASSIVE MODE WITH or Without MONO SUB 2 independent passive cabinets L R L SUB R 4 3 2 1 2 1 L R L R 4 3 2 1 2 1 n STEREO PASSIVE MODE WITH STEREO SUB MONO PASSIVE WITH 2 SUBS L R SUB L SUB R L R 4 3 2 1 2 1 L R SUB 1 SUB 2 MAIN 4 3 2 1 2 1 n ACTIVE 4 WAY...

Page 9: ...ety factor So do not use set ups which are not designed for the cabinet you are using Equalising acoustical response This equaliser section achieves the correction required to obtain a flat system response as the cabinets are acoustically designed for maximum efficiency on the whole frequency range Active rather than passive attenuation allows the lowering of amplifier voltages for a given output ...

Page 10: ...ese adjustments are part of the factory set ups and are necessary to time align the corresponding cabinet that is selected User set up Following user delay adjustment is possible GLOBAL Affecting all channels at the same time delaying all the system for application as delay towers MAIN Affecting only CH3 4 for passive set up and CH2 3 4 for active channels delaying the main system if Sub basses ar...

Page 11: ... the number of amplifier channels is acceptable Where precise information is not available and taking 5 kΩ as the minimum expected value then seven channels in parallel per output is a conservative maximum In the case where input impedance is 20kΩ it puts this value up to 30 amps channels General Functions System Protections The following protection functions are performed See Protection Informati...

Page 12: ...out powering off and on Press the three buttons to reset then let go of the swap button to enter into MENU 0 In that case you will have to keep the A B Buttons until all LEDs light off Note that to execute a download you will have to physically turn the unit off and then back on See Download page 17 Mute Solo buttons Front panel direct access The Mute or Solo mode is selected in the user menu Plea...

Page 13: ...efer to the release notes issued with each new download to track eventual menu changes Main Family Selection Changing Cabinet Family In order to prevent end user changing between different NEXO system set ups during use the following procedure is obligatory This procedure has been purposely designed to avoid any mistake It is nevertheless very easy to change set up among the same family see menu 3...

Page 14: ...annel can be delayed by up to a maximum global individual delay of 450ms 150m See page 8 The unit can display in FEET METRES SECONDS as required Delay is adjustable in 10cm 0 3ms increments The control pot will accelerate through the adjustments faster according to the speed of use 1 3 OUT Levels global HF MF LF SUB Adjust overall separate TDcontroller gain with this menu These gain controls are p...

Page 15: ...identification purposes NOTE ALL SAVED SETUPS WILL BE ERASED WHEN DOWNLOADING A NEW VERSION OF THE SOFTWARE 1 6 RECALL Set up Recalling a user set up is forbidden if the family of cabinet is not the same When recalling a set up the unit will stay in the recall menu allowing another selection for comparison Switching from a set up to another is glitch free and instantaneous no muting takes place 1 ...

Page 16: ...ult password is NEXO This allows you also to get into an INSTALLER menu Please contact your NEXO dealer if access required 2 3 Earth Lift CHASSIS LINKED CHASSIS LIFTED Earth Lift information is stored in the user set up and automatic save set up It will keep the same state when powering the unit on or off also in the event of mains failure 2 4 SENSE GAIN Allows switching between line level sense l...

Page 17: ...MP POWER Allows you to enter a Nominal Amp RMS power into 8ohms Adjustable from 200 Watts to 5000 Watts in 50W steps for each channel Warning this power is specified into an 8 Ohm load and does not represent the maximum power of the Amp Configuration select 3 1 System Config Changing a set of parameters within the same family is made immediately and is barely audible ...

Page 18: ...vice people DISCONNECT MAINS POWER TO THE UNIT then follow these instructions Open the fuse holder window in the power entry module located on the rear of the unit External access Remove the red fuse holder and insert the corresponding fuse 115V T400mA 230V T200mA for the voltage required into the opposite side of the holder For safety reasons when the fuse holder is flipped around for voltage cha...

Page 19: ...232 serial port PC COM port 1 Don t care 1 2 RXD ß Receive 3 3 TXD Transmit à 2 4 Don t care 6 5 SGND Signal ground 5 6 Don t care 4 7 Don t care 8 8 Don t care 7 9 Don t care 9 The NEXO download software is DOS compatible and has been tested on the following operating systems n Microsoft MSDOS V5 0 and above n DOS shell of Microsoft Windows 3 x n DOS shell of Microsoft Windows 95 n DOS shell of M...

Page 20: ...r program NXLOAD EXE Execute the following procedure to load the new software into the NX241 Flash EPROM 1 Connect the serial cable to both computer and NX241 2 Execute your DOS shell or start your machine from DOS 3 At the DOS prompt type the start command for the loader in the directory containing the files The correct syntax is as follows NXLOAD filename COMport_number ENTER e g NXLOAD LOAD1_80...

Page 21: ...aded will be displayed on both the computer screen and the NX241 whilst the process is in operation The download procedure is complete when the unit resets all LED s on 6 The NX241 now HAS to be reset AGAIN to enter the configuration menu Turn the unit OFF wait 5 seconds and then power back ON or hold down simultaneously the three menu buttons A B Hold down the two menu buttons A B to enter into t...

Page 22: ... buffer while the VCEQ acts as an instantaneous limiter very short attack time to prevent displacement from overriding the maximum permissible value Temperature control Each sense signal is fed into a shaping filter one per transducer each one producing a signal proportional to the instantaneous current flowing into the voice coil of the transducer After rectification this signal is integrated wit...

Page 23: ... different channels are not heating at the same time In addition triggering a temperature protection means that the loudspeaker has already lost some efficiency power compression up to 3dB in extreme cases The purpose of interchannel regulation is to cancel that effect by linking VCAs together When the protection is activated on one channel and reaches a predetermined threshold the regulation sect...

Page 24: ...amplifier is well adapted overheating after approximately ten minutes is normal but thermal protection must not operate too quickly after starting this test Amplifier gains As you already read in the Quick Start section Information on the amplifiers used is MANDATORY This value is the key of a correct setting It is very important to know the gain of all amplifiers present in your set up The tolera...

Page 25: ...ber that constant sensitivity settings will give you different gain value when the amp Power is different Gain value NEXO recommends low gain amplifiers 26dB is recommended as it is at the same time adequately low and quite common This considerably improves signal to noise ratio and allows all preceding electronic gear including the TDcontroller to operate at optimum level Remember that using a hi...

Page 26: ... Floating 150 kΩ 18 bit converters 8 Pole Removable Strip Terminal Audio Outputs 4 Audio Outputs 24 bit converters Electronically balanced 50 Ohms 4 XLR 3M connectors Processing 24 bit data with 48 bit accumulator 100MIPS Optional Expansion Board 300MIPS Front Panel Menu A and Menu B buttons 16 characters by 2 lines display Select Wheel Enter button IN Clip DSP Clip red LED s Speaker Protection ye...

Page 27: ......

Page 28: ...165 Francisco Blvd Suite E2 San Rafael CA 94901 Tel 1 415 482 6600 Fax 1 415 482 6110 Email nexousa aol com UK NEXO limited 9 Lyon Road Walton on Thames Surrey KT12 3PU Tel 44 1932 886 007 Fax 44 1932 886 008 Email info nexo sa com FAR EAST NEXO Far East Ltd 101 Lorong 23 Geyland 06 04 Prosper House Singapore 388399 Tel 65 742 5660 Fax 65 742 8050 Email info nexo sg com ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands