Drawmer DL120 Operator'S Manual Download Page 10

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DL221 OPERATORS MANUAL

TECHNICAL SPECIFICATIONS

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

INPUT IMPEDANCE

10KOhm

HEADROOM

+18dB

BANDWIDTH

20Hz - 30KHz (1dB)

NOISE @ UNITY GAIN

(Referred to +4dBm)

Wideband

85dB

22Hz-22KHz

90dB

CCIR ARM

91dB

IEC A

93dB

DISTORTION

100Hz

1KHz

10KHz

Unity gain +4dBm Input

0.02%

+14dBm input 20dB GR.

0.05%

0.04%

COMPRESSOR

Threshold

-24dB to infinity (ref +4dBm)

Ratio

Variable 1:1 to 20:1

Attack

50µS to 5mS

Release

50mS to 5 Sec

Output Gain

-20dB to +20dB

PEAK LIMITER

Threshold

+6dB (ref +4dB)

Ratio

50:1

Attack

50µS

Release

Automatic

STEREO TRACKING

± 0.5dB from 0-22dB Gain Reduction.

POWER REQUIREMENTS

115Volt or 230Volt at 50-60Hz, 9 Watts

FUSE RATING

50mA for 230Volt, 100mA for 115Volt
Conforming to IEC127-2

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 Kgs

Summary of Contents for DL120

Page 1: ...ERATORS MANUAL and DL120 CONTENTS SAFETY CONSIDERATIONS page 1 INTRODUCTION page 2 INSTALLATION page 3 CONTROL DESCRIPTIONS page 4 OPERATION page 6 TECHNICAL SPECIFICATION page 8 h DRAWMER ELECTRONICS LTD 1990 ...

Page 2: ... number 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 been damaged by misuse modification or unauthorised repair THIS WARRANTY IS IN LIEU OF ALL WARRANTIES WHETHER ORAL OR WRITTEN EXPRESSED IMPLIED OR STATUTORY DRAWMER MAKES NO OTHER WARRANTY EITHER EXPRE...

Page 3: ...NS INPUT VOLTAGE SWITCH IS SET TO 230 VOLTS AC AND 125mA WHERE THE MAINS INPUT VOLTAGE IS 115 VOLTS AC ALL FUSES MUST COMPLY WITH IEC127 2 THE FUSE BODY SIZE IS 20mm x 5mm CAUTION MAINS CABLE DO NOT ATTEMPT TO CHANGE OR TAMPER WITH THE SUPPLIED MAINS CABLE CAUTION SERVICING DO NOT PERFORM ANY SERVICING REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL WARNING TO REDUCE THE RISK OF FIRE OR ELECTRI...

Page 4: ...en on a final mix because the environment in which most material is heard is often noisy to say nothing of the limited dynamic range of the reproduction equipment e g portable radios and cassette players A well designed compressor should operate smoothly and create a minimum of distortion and noise Such a device in use should go almost un noticed unless for special effects and require a minimum of...

Page 5: ...ead try disconnecting the signal screen on the cables connecting the DL221 to the patchbay If such measures are necessary balanced operation is recommended S C INSERT The side chain insert point is configured as a stereo jack socket wired tip return ring send This point is unbalanced and would normally be connected to a normalised or semi normalised pair of patchbay contacts If earth loop problems...

Page 6: ...e compressor to recover from gain reduction Programme signals are complex so a complex release characteristic is required for optimum results Fast transients require a fast release time to avoid over limiting effects whereas normal programme material should be user adjustable In addition to these features the DL231 contains circuits which prevent partial recovery between waveform peaks thus almost...

Page 7: ... at all times This is quite normal and does no indicate a fault condition STEREO LINK couples the control circuits of both compressors to prevent image shifting when treating stereo material on a final mix The peak limiters can also be used if desired but they remain independent Operational controls should be set the same on both channels when linked Two DL120 s may also be linked externally for s...

Page 8: ... 2 and attenuation at 10 to 20 dB This will provide a gentle expansion which will minimise drop out effects during a fade However drums would be better with a 1 5 or 1 20 ratio and 20 or 40 dB attenuation using a higher threshold level For vocals set threshold so as to remove breath and headphone noise and set ratio a 1 2 or 1 5 with attenuation of 20 or 40 dB In all cases attack is automatic and ...

Page 9: ... patch bay and link them for stereo 19 Output 20 21 Ov 22 Side chain send 23 Side chain return 24 Ov 25 Input 26 27 Ov If side chain access is not required pins 22 and 23 must be shorted either at the rack or patch bay On the DL221 side chain access is via a stereo jack socket at the rear RING SEND TIP RETURN Send and return are automatically shorted when no plug is inserted UNITS WITH XLR CONNECT...

Page 10: ...put 20dB GR 0 05 0 04 0 04 COMPRESSOR Threshold 24dB to infinity ref 4dBm Ratio Variable 1 1 to 20 1 Attack 50µS to 5mS Release 50mS to 5 Sec Output Gain 20dB to 20dB PEAK LIMITER Threshold 6dB ref 4dB Ratio 50 1 Attack 50µS Release Automatic STEREO TRACKING 0 5dB from 0 22dB Gain Reduction POWER REQUIREMENTS 115Volt or 230Volt at 50 60Hz 9 Watts FUSE RATING 50mA for 230Volt 100mA for 115Volt Conf...

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