Ahuja DFX-16 User manual

DFX-16
Thank you for purchasing the AHUJA 18bit Digital Effects Processor.
Please read this manual thoroughly before making connections and
turning on the power. Following the instructions in this manual will
enable you to obtain optimum performance from your new AHUJA
Digital Effects Processor.
Please retain this manual for future reference.
®PADIGITAL
EFFECTSPROCESSOR
OPERATION MANUAL
OPERATION MANUAL

• Safety Instructions
CAUTION: To reduce the risk of
electric shock, do not remove the
top cover. No user serviceable
parts inside. Refer servicing to
qualified personnel only.
WARNING: To reduce the risk of fire or electrical shock, do not expose this
equipment to rain or moisture.
Detailed Safety Instructions: All the safety instructions in this manual
should be read before operating this equipment.
Retain Instructions: The operation manual should be kept for future
reference.
Follow Instructions: All operation and safety instructions should be
followed.
Water and Moisture: In order to prevent any fire or shock hazard, do not
expose this equipment to rain or moisture.
Power Source: The equipment should be connected to 9V AC adaptor
supplied alongwith. TheAC adaptor should be connected to 220-240V 50Hz
AC .
Power-cord Protection: Do not cut, kink, damage or modify the power
supply cord of the 9V AC adaptor supplied with the equipment. Keep the power
supply cord away from heaters & harmful chemicals. Do not place heavy
objects on the power cord.
Operation on Generator: When operating DFX-16 on a generator, make
sure it is switched 'OFF' till the generator voltage has stabilized and then only
switch the processor ON.
Heat: The appliance should be situated away from heat sources such as
radiators, amplifiers and other appliances that produce heat.
the
mains
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol, wherever it
appears, alerts you to the
presence of uninsulated
dangerous voltage inside
the enclosure, that may be
sufficient to constitute a
risk of shock.
This symbol, wherever it
appears, alerts you to
important operating and
maintenance instructions in
the accompanying literature.
Read the manual.
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• Table of Contents
Contents Page No.
Features / General Description of Product. . . . . . . . . . . . . . . . . . . . . . . . . 4
Front Panel Controls & Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Rear Panel Controls & Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Description of 16 Preset Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Description of 16 Preset Variations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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• Features / General Description of Product
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Robust and compact design for usage in a wide
variety of PA and Pro Audio applications.
Easy to select from 16 preset programs through a
rotary switch.
Each program consists of 16 selectable variations
resulting in a total of 256 preset combinations through
DFX-16.
Accepts stereo as well as mono inputs through
¼" unbalanced jack sockets.
Separate ¼" unbalanced jack socket for left and right
outputs.
Individual volume control for input and output signals.
Mix volume control adjusts the level of dry and wet
signal content in the output.
Facility to connect a foot switch through a ¼" jack
socket. Foot switch is used to bypass or enable the
presence of wet (processed) signal in the output.
Operates on 220-240V AC mains through a dedicated
9V AC adaptor, supplied alongwith.
4

• Front Panel Controls & Features
1. INPUT Volume Control 5. SELECT Switch
For adjustment of the signal level For selecting the desired program
being fed to the effects processor. settings out of the 16 preset
effects algorithms available from
2. MIX Control DFX-16.
For adjustment of the desired mix
of dry (unprocessed) & wet 6. POWER LED
(processed) signal level available The glowing of this LED indicates
at the output. At position 0, the that the effects processor is ON.
output signal comprises of only 7. VARIATIONS Switch
dry signal. In order to raise the This rotary switch provides 16
level of wet signal, turn up the MIX different preset variations of time,
volume control to a desired depth or regeneration for any of
position. the program selected.
3. OUTPUT Volume Control
For adjustment of the output
signal level from the effects
processor.
4. SIGNAL LED
The flickering of this LED indicates
the presence of acceptable levels
of input signal. But the continuous
glow of the SIGNAL LED indicates
that there is excessive signal
being fed to the input of the effects
processor, resulting in distorted
output.
5
DFX-16 SELECT VARIATIONS
POWERSIGNAL
18bit Digital Effects Processor
101010 000 OUTPUTMIXINPUT
Rotary
Chorus/Rev
Flange/Rev
Delay/Rev
Delay
Flange
Chorus
Tremolo
Hall 1
Hall 2
Hall 3
Room 1
Room 2
Room 3
Plates 1
Plates 2 10
11
12
13
141516 12345
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7
8
9
1 2 3 4 5 6 7

• Rear Panel Controls & Features
8. POWER Socket 11. INPUT Jack Sockets
For connecting the 9V AC power The LEFT (MONO) jack socket is
supply adaptor as supplied used for connecting signal
alongwith. sources with mono outputs like an
AUX SEND (Post Fade) of a
9. BYPASS Jack Socket mixer, the preamp output of a PA
For connecting an external foot mixer, an I / O insert of a mixing
switch through a ¼" phone plug. console and the send / return of a
The foot switch is used to enable powered speaker.
or disable the presence of wet
(processed) signal at the output. When the mono input is
10.OUTPUT Jack Sockets connected to LEFT (MONO) jack
In mono applications, either of the socket only, then same signal also
LEFTorRIGHToutputjacksockets gets routed to the RIGHT jack
can be connected to the Aux input socket internally.
of a PA amplifier, Line input of a
directcoupledamplifier(whenused In stereo applications, LEFT &
in mono mode), an I / O insert of a RIGHT inputs can be connected to
mixer or the send / return of a the two AUX SEND (Post Fade)
poweredspeaker. inputs of a mixing console or the L
& R LINE outputs of a mixer.
In stereo applications, for
connecting to AUX RETURN
inputs of a mixing console, the
Line input of a direct coupled
amplifier (when used in stereo
mode) or the Line inputs of a two
zone amplifier.
6
9 VAC~
POWER BYPASS OUTPUT INPUT
8 9 10 11
LEFT LEFT (MONO)
RIGHT RIGHT

• Interconnections
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The effects processor can be used effects processor before the power
as a table top unit. The unit should is turned ON.
be situated so that its location or To avoid signal overloading,
position does not get affected by distortion and to minimize the
the heat of the amplifier. noise, it is necessary to set the
The effects processor must always proper signal levels at every point
be powered through a 9V AC in the send / return chain.
adaptor supplied alongwith. The connection diagrams that
Always insert the AC adaptor plug follow display the typical types of
into the 9V AC power socket of the input sources and output
unit and then connect the AC equipments which can be
adaptor to an AC mains outlet. connected to the effects processor.
For correct connections and
When foot switch is to be used, operation, check the specification
always connect the foot switch to of the connected equipment.
the bypass jack socket of the
7
9V AC Adaptor Foot Switch MX-15
MX-15
Preamp
Output
Mic-1
Send
Mic-1
Return
PSX-1200
SSA-250M
BTZ-7000
SSA-250M
BTZ-7000
ZONE-A ZONE-A
Line Input
Aux Input
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
DFX-16 (Rear Panel)
Mixing Console
P r o S e r i e s
A M X - 1 6 1 2
Aux Return
Aux Send (Post Fade)

• Typical Applications
ConnectingDFX-16toa mixing console with aAUX SEND (PostFade)and
StereoAUXRETURN
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A
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
DFX-16
Left
Output
Left (Mono) Input P r o S e r i e s
A M X - 1 6 1 2
Mixing Console Aux Send
(Post Fade)
Aux
Return
R
Aux
Return
L
Right
Output
P r o S e r i e s
A M X - 1 6 1 2
Mixing Console
Aux-2 Send
(Post Fade)
Aux
Return
R
Aux
Return
L
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
DFX-16
Left
Output
Left (Mono) Input Right Input
Right
Output
Connecting DFX-16 to a mixing console with two AUX SEND (Post Fade)
andStereoAUXRETURN
B
Aux-1 Send
(Post Fade)

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• Typical Applications....
ConnectingDFX-16totheI/Oinsertinamixingconsole
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
DFX-16
Left (Mono)
Input
Left
Output
C
Wiring sequence of connection cable for I / O Insert
¼" Jack Plug
Return
Ground
Send I / O Insert
of a mixing
console
Send Ground
¼" Jack Plug
¼" Jack Plug
DFX-16 Left
(Mono) Input
Return Ground
DFX-16
Left Output
P r o S e r i e s
A M X - 1 6 1 2
Mixing Console
I / O Insert
Connecting a musical instrument like guitar to the LEFT (MONO) INPUT, a
mixing console to the LEFT OUTPUT and a foot switch to the BYPASS
socketoftheDFX-16
D
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
Left Output
Bypass
DFX-16
Left (Mono)
Input
Guitar
PA Mixer AMX-1412
AMX-1412
Foot Switch
Line Input

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• Typical Applications....
ConnectingDFX-16totheSEND/RETURNofapoweredspeaker
E
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
DFX-16
Left (Mono)
Input
Left
Output
Powered Speaker
PSX-1200
Mic-1
Send / Return
ConnectingDFX-16toaPAmixerandatwozoneamplifier
F
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
Left Output
DFX-16
Right Output
Left (Mono) Input
Preamp
Output
PA Mixer MX-15
MX-15
Zone A Input Zone B Input
Two Zone Amplifier
BTZ-7000
BTZ-7000
ZONE-A ZONE-A
Wiring sequence of connection cable for Send / Return
¼" Jack Plug
Return
Ground
Send Mic-1
Send / Return
of PSX-1200
Send Ground
¼" Jack Plug
¼" Jack Plug
DFX-16 Left
(Mono) Input
Return Ground
DFX-16
Left Output

• Typical Applications....
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Connecting DFX-16 to the L & R Line output of a mixing console and Line
Inputsofa directcoupledamplifier
H
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
Left Output
DFX-16
APA-1202
Direct Coupled Amplifier
APA-1202 (in Stereo Mode)
Ch. A Input Ch. B Input
Right Output
Left (Mono) Input
Right Input
PA Mixer AMX-1412
AMX-1412
L
Line Output R
ConnectingDFX-16tothePREAMPoutputandAUXinputofaPAamplifier
G
DFX-16
9 VAC~
POWER BYPASS OUTPUT INPUT
LEFT LEFT (MONO)
RIGHT RIGHT
Left Output Left (Mono) Input
SSA- 5000EM
Preamp Output
Aux Input
PAAmplifier
SSA-5000EM

• Description of 16 Preset Programs
12
Program Name Description Adjustable Parameters
HALL 1 HALL REVERB ALGORITHM Decay Time
Input LP Filter: 16kHz
Process High Damp Filter: 12kHz
Process Low Damp Filter: 50Hz
Predelay Time: 0.054 sec.
Output LP Filter: 16kHz
Output HP Filter: 50Hz
HALL 2 HALL REVERB ALGORITHM Decay Time
Input LP Filter: 7kHz
Process High Damp Filter: 7.5kHz
Process Low Damp Filter: 50Hz
Predelay Time: 0.077 sec.
Output LP Filter: 4kHz
Output HP Filter: 20Hz
HALL 3 HALL REVERB ALGORITHM Decay Time
Input LP Filter: 12kHz
Process High Damp Filter: 12kHz
Process Low Damp Filter: 20Hz
Predelay Time: 0.0 sec.
Output LP Filter: 12kHz
Output HP Filter: 20Hz
ROOM 1 ROOM REVERB ALGORITHM Decay Time
Input LP Filter: 14kHz
Process High Damp Filter: 12kHz
Process Low Damp Filter: 20Hz
Predelay Time: 0.003 sec.
Output LP Filter: 12kHz
Output HP Filter: 20Hz
ROOM 2 ROOM REVERB ALGORITHM Decay Time
Input LP Filter: 16kHz
Process High Damp Filter: 14kHz
Process Low Damp Filter: 20Hz
Predelay Time: 0.003 sec.
Output LP Filter: 12kHz
Output HP Filter: 20Hz

• Description of 16 Preset Programs....
Program Name Description Adjustable Parameters
ROOM 3 ROOM REVERB ALGORITHM Decay Time
Input LP Filter: 6.5kHz
Process High Damp Filter: 2.5kHz
Process Low Damp Filter: 20Hz
Predelay Time: 0.019 sec.
Output LP Filter: 6kHz
Output HP Filter: 200Hz
PLATE 1 PLATE REVERB ALGORITHM Decay Time
Input LP Filter: 12kHz
Process High Damp Filter: 12kHz
Process Low Damp Filter: 100Hz
Predelay Time: 0.019 sec.
Output LP Filter: 16kHz
Output HP Filter: 200Hz
PLATE 2 PLATE REVERB ALGORITHM Decay Time
Input LP Filter: 8kHz
Process High Damp Filter: 5kHz
Process Low Damp Filter: 50Hz
Predelay Time: 0.019 sec.
Output LP Filter: 7kHz
Output HP Filter: 200Hz
TREMOLO AMPLITUDE MODULATION Modulation Rate
ALGORITHM Modulating Wave
Input High Damp Filter: 18kHz
Input Low Damp Filter: 10Hz
Modulating Waves: 1 to 8 Ramp,
9 to 16 Sin
CHORUS PHASE MODULATION ALGORITHM Modulation Rate
Input High Damp Filter: 18kHz Modulation Depth
Input Low Damp Filter: 10Hz Modulating Wave
Modulating Waves: 1 to 8 RAMP,
9 to 16 SIN
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• Description of 16 Preset Programs....
Program Name Description Adjustable Parameters
FLANGE PHASE MODULATION ALGORITHM Modulation Rate
WITH REGENERATION ALGORITHM Modulation Depth
Input High Damp Filter: 18kHz Regeneration
Input Low Damp Filter: 10Hz Percentage
Modulating Waves: 1 to 8 RAMP, Modulating Wave
9 to 16 SIN
DELAY MONO DELAY ALGORITHM Decay Time
Input High Damp Filter: 18kHz Delay Time
Input Low Damp Filter: 10Hz
DELAY / MONO DELAY + REVERB ALGORITHM Decay Time
REVERB Input High Damp Filter: 18kHz Delay Time
Input Low Damp Filter: 10Hz
Predelay Time: 0.0 ms
Process LP Filter: 12kHz
FLANGE / MONO DELAY + FLANGE ALGORITHM Reverb Decay Time
REVERB Input High Damp Filter: 18kHz Regeneration
Input Low Damp Filter: 10Hz Percentage
Predelay Time: 8 ms Modulating Wave
Process LP Filter: 12kHz
Modulating Waves: 1 to 8 Ramp,
9 to 16 Sin
CHORUS / MONO DELAY + CHORUS ALGORITHM Reverb Decay Time
REVERB Input High Damp Filter: 18kHz Modulating Wave
Input Low Damp Filter: 10Hz
Predelay Time: 8 ms
Process LP Filter: 12kHz
Modulating Waves: 1 to 8 Ramp,
9 to 16 Sin
ROTARY STEREO LESLIE ALGORITHM Rotation Speed
SPEAKERS Cylinders LP Filter: 200Hz Modulation Depth
Horns HP Filter: 2kHz
Modulating Waves: Sin
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• Description of 16 Preset Variations
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Program Name Position of Value of Adjustable Parameter
Variation Encoder
HALL 1 1 to 8 Decay time: 0.37 sec. to 0.96 sec.
9 to 15 Decay time: 1.21 sec. to 9.10 sec.
16 Decay time: >30 sec.
HALL 2 1 to 8 Decay time: 0.39 sec. to 1.00 sec.
9 to 15 Decay time: 1.22 sec. to 8.60 sec.
16 Decay time: >30 sec.
HALL 3 1 to 8 Decay time: 0.45 sec. to 1.50 sec.
9 to 15 Decay time: 1.85 sec. to 13.9 sec.
16 Decay time: >40 sec.
ROOM 1 1 to 8 Decay time: 0.32 sec. to 0.79 sec.
9 to 15 Decay time: 0.99 sec. to 6.90 sec.
16 Decay time: >25 sec.
ROOM 2 1 to 8 Decay time: 0.36 sec. to 0.89 sec.
9 to 15 Decay time: 1.07 sec. to 7.50 sec.
16 Decay time: >25 sec.
ROOM 3 1 to 8 Decay time: 0.35 sec. to 0.87 sec.
9 to 15 Decay time: 1.07 sec. to 6.30 sec.
16 Decay time: >25 sec.
PLATES 1 1 to 8 Decay time: 0.42 sec. to 1.09 sec.
9 to 15 Decay time: 1.45 sec. to 9.10 sec.
16 Decay time: >30 sec.
PLATES 2 1 to 8 Decay time: 0.44 sec. to 1.07 sec.
9 to 15 Decay time: 1.39 sec. to 8.50 sec.
16 Decay time: >30 sec.
TREMOLO 1 to 8 Period: 0.84 sec. to 0.06 sec.
Mod. Rate: 1-19Hz to 16.00Hz
Amplitude Att.: 84%
9 to 16 Period: 1.40 sec. to 0.20 sec.
Mod. Rate: 0.71Hz to 5.00Hz
Amplitude Att.: 36%

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• Description of 16 Preset Variations....
Program Name Position of Value of Adjustable Parameter
Variation Encoder
CHORUS 1 to 8 Period: 11 sec. to 0.41 sec.
Mod. Rate: 0.09Hz to 2.43Hz
9 to 16 Period: 9.20 sec. to 0.30 sec.
Mod. Rate: 0.11Hz to 3.33Hz
FLANGE 1 to 8 Period: 13.40 sec. to 6.05 sec.
Mod. Rate: 0.075Hz to 0.165Hz
Feedback: 60% to 92%
9 to 16 Period: 4.50 sec. to 0.53 sec.
Mod. Rate: 0.222Hz to 1.886Hz
Feedback: 82%
DELAY 1 to 6 Delay Time: 0.03 sec. to 0.08 sec.
7 to 16 Delay Time: 0.1 sec. to 1.00 sec.
Delay Time: 1.00 sec. to 10.00 sec.
DELAY / REV. 1 to 4 Delay Time: 0.03 sec. to 0.06 sec.
Rev. Decay Time: 1.30 sec. to 1.40 sec.
5 to 16 Delay Time: 0.08 sec. to 1.2 sec.
Delay Decay Time: 0.75 sec. to 9.00 sec.
Rev. Decay Time: 1.30 sec. to 9.30 sec.
FLANGE / REV. 1 to 8 Flange Period: 2.00 sec.
Flange Rate: 0.50 sec.
Rev. Decay Time: 0.80 sec. to 6.40 sec.
9 to 8 Flange Period: 2.60 sec.
Flange Rate: 0.384 sec.
Rev. Decay Time: 0.80 sec. to 6.40 sec.
CHORUS / REV. 1 to 8 Chorus Period: 1.30 sec.
Chorus Rate: 0.769Hz
Rev. Decay Time: 0.78 sec. to 8.00 sec.
9 to 16 Chorus Period: 1.60 sec.
Chorus Rate: 0.625Hz
Rev. Decay Time: 0.78 sec. to 8.00 sec.

• Block Diagram
17
MPU
(U9P87C54UBAA)
AD0-AD7 ED0-ED7
EA0-EA9
DSP
(U8 TMS57002DPHA)
MEMORY (DRAM)
(U10,U11)
POWER SUPPLY
VOLTAGE REGULATOR
AC 9V
INPUT
+5V
-5V
S10
IN-R
SO0
IN-L OUT-R OUT-L
ENCODERA
PROGRAM
ENCODERA
VARIATIONS
STEREOAUDIO CODEC
A/D and D/ACONVERTER
(U6 PCM3001E)
11.0592MHZ
CLOCK DIVIDE
(U7 74HC393)
LRCKIN=43.20KHz
BCK=1.382MHz
FOOTSWITCH
CONTROL
INPUT BUFFER & AMPLIFIER
PJ5
FOOT
SWITCH Q1
11.0592MHZ
PJ1 PJ2
INPUT R
INPUT L
(MONO INPUT)
INPUT LEVEL INPUT LEVEL
OUTPUTAMPLIFIER
OUTPUT LEVEL OUTPUT LEVEL
MIX CONTROL PJ3
PJ4
OUTPUT R
OUTPUT L

• Specifications
18
Outputs 1V / 500 (Rated), 2.4V (Max.)
Input 50mV / 1M Stereo (Rated),
50mV / 500k Mono (Rated),
100mV for Max. Output
Distortion 0.02% THD
S / N Ratio 80dB
Frequency Response 20Hz - 20kHz (±2dB)
Digital Processor 18 Bit Digital Effects Processor
Maximum Delay 1200 Milliseconds
Main Programs 16
Total Preset Combinations 256
Indicators Power LED,
Signal LED (7dB prior to true clip)
Power Supply AC: 9V (Adaptor provided)
Dimensions W200 ? H45 ? 150 mm
Net Weight 0.90kg
• Design and Specifications are subject to change without notice owing to continuous product upgradation.
• Technical specifications are subject to production tolerances.

• Notes
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Model No.......................................................................................................
Dealer's Name ..............................................................................................
Dealer's Phone No........................................Fax No. ...................................
Date of Purchase .........................................................................................
Web/10/05
AHUJA RADIOS • 215, Okhla Industrial Estate, New Delhi - 110 020, INDIA
Tel.: [phone] Fax : [phone]
E-mail : [email protected], [email protected]
Website: ahujaradios.com
®
is a registered trademark of Ahuja Radios in India
and other countries.
© Copyright Ahuja Radios, 2005. All rights reserved.Any
unauthorized reproduction or use of logos, images or
design elements is strictly prohibited by law.
No part of the compilation may be reproduced in any
manner or translated without written permission.
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