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LPA400 User Guide

LPA400

Series.

Laboratory

Power amplifiers

USER GUIDE

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Summary of Contents for LPA400 Series

Page 1: ...LPA400 User Guide LPA400 Series Laboratory Power amplifiers USER GUIDE ...

Page 2: ...and can deliver up to 100mA rms continuously into any load An indicator on the front panel indicates that the output is on and there is a switch to reset the protection circuitry in the event that it has been triggered by excessive output current As well as ac and ac dc coupling there is a special coupling mode ac dc where the dc component is not eliminated entirely but is reduced by a factor of a...

Page 3: ...o the cost of the LPA400 itself and does not extend to any consequential damage or losses whatsoever including but not limited to any loss of earnings arising from a failure of the product In the event of any problem with the equipment outside of the guarantee period Newtons4th Ltd offers a full repair service contact your local representative The LPA400 does not require any calibration Declaratio...

Page 4: ...ak common mode Keep all the ventilation holes on the underneath rear top and sides free from obstruction Do not operate or store under conditions where condensation may occur or where conducting debris may enter the case There are no user serviceable parts inside the amplifier do not attempt to open the case refer service to the manufacturer or his appointed agent Potentially lethal voltages are p...

Page 5: ...tion 40 dB decade Low bandwidth filter type linear phase Gain options switch x50 x200 x500 Low frequency gain accuracy 0 1 Output connector isolated BNC Peak output voltage 400 180 V Peak output current 75 150 mApk Continuous output current 50 100 mA rms Maximum dc output current 70 250Vdc 25 0V mA dc Slew rate Typical 350 V µs Output impedance 50 Temperature range 0 40 C Size 8 5 x 15 x 25 cm Wei...

Page 6: ... current the amount of energy transfer distorts the current waveform resulting in excessive peak current Fig 1 below whilst the rms value remains within specification To ensure correct functionality and prevent false triggering of the protection circuit ideally the current waveform should be a sinewave as pictured in Fig 2 below Fig 1 Distorted current waveform Fig 2 Correct current waveform ...

Page 7: ... 5 Between 50KHz and 1MHz THD is typically less than 5 This graph demonstrates the effect of Total Harmonic Distortion on the Maximum Output Voltage of the LPA400 amplifier at higher frequency levels up to 1MHz 1 0 10 0 100 0 1000 0 1 10 100 1000 Output Voltage vrms Frequency KHz LPA400 Maximum Output Vrms with 5 THD Vrms ...

Page 8: ...LPA400 User Guide ...

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