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Power Amplifier Type 2719 –

User Manual

16

Distortion

The percentage of harmonic distortion produced by Type 2719 is shown in Fig.4.5. Considering
the 180 VA power output rating of the amplifier, the amount of distortion is very low. This can
be attributed to the generous amount of feedback applied and the use of a direct-coupled input.

Fig.4.5

Typical harmonic distortion percentage curves for Voltage Mode and Current Mode
output impedance – 180 VA in a 0.8

Ω

 load

Output Distortion

1.2

1

0.8

0.6

0.4

0.2

0.1

0

1

2

5

10

20

50

100

200

500

1k

2k

5k

10k

20k

50k

100k

Frequency (Hz)

010105

High Impedance

Low Impedance

Low Impedance
Specification

High Impedance
Specification

Содержание 2719

Страница 1: ...5 83 05 Ireland 353 1 807 4083 Italy 39 0257 68061 Japan 81 3 5715 1612 Netherlands 31 318 55 9290 Norway 47 66 77 11 55 Poland 48 22 816 75 56 Portugal 351 21 41 69 040 Republic of Korea 82 2 3473 06...

Страница 2: ...BE 1660 12 May 2006 Power Amplifier Type 2719 User Manual...

Страница 3: ...plosion Hazard The equipment is not designed to be used in potentially explosive environments It should not be operated in the presence of flammable liquids or gases Warnings Whenever it is likely tha...

Страница 4: ...oduction 1 CHAPTER 2 Controls 3 Front Panel 3 Back Panel 4 CHAPTER 3 Operation 5 Preliminary 5 System Checks and Connections 5 CHAPTER 4 Characteristics 11 Signal Inputs 11 CHAPTER 5 Specifications 17...

Страница 5: ......

Страница 6: ...e from DC to 100 kHz The rated AC output is 180 VA into a 0 8 exciter or resistive load in the frequency range DC to 15 kHz 0 5 dB The maximum voltage gain is 40 dB Harmonic content of the output is v...

Страница 7: ...Power Amplifier Type 2719 User Manual 2...

Страница 8: ...is switched On The Voltage or Current Mode LED indicator lights green showing the output mode The Interlock LED indicator lights red when the interlock circuit is activated The 0 or 180 LED indicator...

Страница 9: ...impedance is 10 k Full output is produced by a 2 4 V RMS input signal Voltage Monitor BNC socket providing output of the amplifier voltage waveform including DC component for display on an oscillosco...

Страница 10: ...is designed to fit into 19 standard rack system It may be used free standing on its four rubber feet however when fitted in a instrumentation rack the rubber feet must be removed System Checks and Con...

Страница 11: ...e amplifier unit is aligned with the appropriate voltage printed on the selector Fuse Check and Replacement The mains fuse and fuse holder are integrated in the voltage selector It can be released usi...

Страница 12: ...ther This is done automatically through the screens of the input and output cables used to interconnect the instruments 2 If instruments equipped with a mains socket protective earth terminal are empl...

Страница 13: ...exciter is exceeded causing the vibration table to knock against its end stops reduce the generator output voltage to a lower level in order to resume operation For frequency sweep vibration testing...

Страница 14: ...Reset and make the necessary adjustments Normal operation can then be resumed by returning Variable Gain dB to the position used for test If a shut down is caused by an internal fault in the amplifier...

Страница 15: ...Power Amplifier Type 2719 User Manual 10...

Страница 16: ...s capacitive coupled giving a 0 5 dB lower limiting frequency of approximately 15 Hz The DC signal input is direct coupled enabling a DC offset voltage to be applied for centring vibration exciter tab...

Страница 17: ...e exciter applications as well as to multiple exciter applications at low frequencies where it is important that the exciters have the same motion In Current Mode high impedance feedback is proportion...

Страница 18: ...btained using exciters with a nominal load impedance of 0 8 For other exciter load impedances the maximum output rating is as shown in Fig 4 3 This is valid at frequencies from 5 Hz to 15 kHz At other...

Страница 19: ...pedance valid at frequencies from 40 Hz to 10 kHz 200 Maximum Output Power VA Vibration Exciter Type 4808 Vibration Exciter Type 4809 Current Power Voltage Power Current Voltage 180 160 140 120 100 80...

Страница 20: ...nput socket used and the setting of the V C Mode switch as shown by the response curves for small signals given in Fig 4 4 Fig 4 4 Frequency response in Voltage Mode of Type 2719 for power output leve...

Страница 21: ...s can be attributed to the generous amount of feedback applied and the use of a direct coupled input Fig 4 5 Typical harmonic distortion percentage curves for Voltage Mode and Current Mode output impe...

Страница 22: ...TPUT VOLTAGE CAPACITY 12 V RMS DC to 15 kHz via 4 pin Neutrik Speakon plug OUTPUT CURRENT CAPACITY 7 5 A RMS at or below 5 Hz 15 A RMS 40 Hz to 10 kHz 12 A RMS at 15 kHz FREQUENCY RANGE Full Capacity...

Страница 23: ...rrent true RMS adjustable limit 1 to 15 A RMS Power Transistor Temperature Heat Sink Temperature Output Signal Distortion no shut down OTHER FEATURES Electronic peak current limiting POWER REQUIREMENT...

Страница 24: ...it against unintended operation For repair contact your local Br el Kj r representative Under no circumstances should repair be at tempted by persons not qualified in the service of electronic instrum...

Страница 25: ...Power Amplifier Type 2719 User Manual 20...

Страница 26: ...5 83 05 Ireland 353 1 807 4083 Italy 39 0257 68061 Japan 81 3 5715 1612 Netherlands 31 318 55 9290 Norway 47 66 77 11 55 Poland 48 22 816 75 56 Portugal 351 21 41 69 040 Republic of Korea 82 2 3473 06...

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