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DL241 OPERATORS’ MANUAL

TECHNICAL SPECIFICATIONS

(Measurements taken at +4dBu operating level where applicable)

INPUT IMPEDANCE

20K

MAXIMUM INPUT LEVEL

+20dBu

OUTPUT IMPEDANCE

(bal), 100

(unbal)

MAXIMUM OUTPUT LEVEL

+20dBu

BANDWIDTH

<10Hz to 22KHz -1dB

NOISE AT UNITY GAIN

with Expander Off

W ideband

22Hz - 22KHz

CCIR ARM

IEC A

Q-Pk CCIR

-90dB

-95dB

-97dB

-84dB

RMS

-88dB

-93dB

-95dB

-82dB

DISTORTION

100Hz

1KHz

10KHz

Unity Gain, +4dBu input

< 0.03%

< 0.02%

<0.03%

+14dBu input, 10dB Gain Red.

< 0.1%

POWER REQUIREMENTS

115Volt or 230Volt at 50-60Hz, 9 W atts

FUSE RATING

32mA for 230Volt,

63mA for 115Volt

CONFORMING TO IEC 127-2

FUSE TYPE

20mm x 5mm, Class 3 Slo-Blo, 250Volt working

CASE SIZE

482mm (w) x 44mm (h) x 200mm (d)

WEIGHT

(incl packaging)

3.2 Kgs

Summary of Contents for DL241

Page 1: ...NUAL CONTENTS SAFETY CONSIDERATIONS page 1 INTRODUCTION page 2 INSTALLATION page 3 CONTROL DESCRIPTIONS page 5 OPERATION page 8 IF A FAULT DEVELOPS page 10 CONTACTING DRAWMER page 10 TECHNICAL SPECIFI...

Page 2: ...umber copy of the original sales invoice and a detailed description of the problem Drawmer will not accept responsibility for loss or damage during transit This warranty is void if the product has bee...

Page 3: ...INPUT VOLTAGE SWITCH IS SET TO 230 VOLTS AC AND 63mA WHERE THE MAINS INPUT VOLTAGE IS 115 VOLTS AC ALL FUSES MUST COMPLY WITH IEC 127 2 THE FUSE BODY SIZE IS 20mm x 5mm CAUTION MAINS CABLE DO NOT ATTE...

Page 4: ...used The accepted way of dealing with this problem is to include in the compressor a separate expander section with its own threshold control so that a low level gating action may be applied to keep p...

Page 5: ...compatible with mono jacks The mono jack actually shorts the cold terminal to ground For the DL241 units fitted with XLR connectors unbalanced operation is achieved by shorting pin 3 of the XLR conne...

Page 6: ...voltage which is different to that as supplied the following procedure must be carried out see following diagram 1 Disconnect the unit from the mains 2 Using a number 1 size pozidrive screwdriver remo...

Page 7: ...ote because the expansion ratio varies with signal level it is possible to arrive at a situation where the red expansion LED may be illuminated when little or no perceived gain reduction is taking pla...

Page 8: ...he rate at which the compressor will respond to input signals that exceed the threshold level This may be set in the range 0 5mS to 100mS Release Sets the rate at which the system gain returns to norm...

Page 9: ...y fast acting enabling it to control any peaks without audible distortion If the output signal is so high as to cause the limiter to operate for more than 20mS the system gain is automatically reduced...

Page 10: ...ly by observing the gain reduction meter In general a maximum gain reduction of between 8dB and 12dB will be adequate If more gain reduction appears necessary consider applying a conservative degree o...

Page 11: ...mme dynamics it should be possible to obtain far more satisfactory results than are possible with conventional expanders By the same token do not assume that because the expander threshold LED flicker...

Page 12: ...original sales invoice and a detailed description of the problem Authorised returns should be prepaid and must be insured All Drawmer products are packaged in specially designed containers for protect...

Page 13: ...th Expander Off Wideband 22Hz 22KHz CCIR ARM IEC A Q Pk CCIR AV 90dB 95dB 95dB 97dB 84dB RMS 88dB 93dB 93dB 95dB 82dB DISTORTION 100Hz 1KHz 10KHz Unity Gain 4dBu input 0 03 0 02 0 03 14dBu input 10dB...

Page 14: ...DL241 OPERATORS MANUAL 12 BLOCK DIAGRAM...

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