LPA05 User Guide
IMPORTANT SAFETY INSTRUCTIONS
This equipment is designed to comply with BSEN 61010-1 (Safety
requirements for electrical equipment for measurement, control, and
laboratory use) –observe the following precautions:
When continually running the LPA05A into a <5Ω impedance load
refer to Current v Load De-rating graph below. However, it is
allowable to run the unit at full current into <5Ωfor a period not
exceeding 30 seconds, otherwise overload damage may occur.
Ensure that the supply voltage agrees with the rating of the
instrument printed on the back panel before connecting the mains
cord to the supply.
This appliance must be earthed. Ensure that the instrument is
powered from a properly grounded supply outlet.
The input and output connectors, and the internal circuitry are
isolated from earth - do not exceed 40V peak common mode.
Keep all the ventilation holes on the underneath, rear, 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.
In the event of a failure of the mains fuse, disconnect the mains
cord and replace the fuse with the same type and rating, as shown
on the rear of the amplifier.
Switch off the amplifier and ensure the output current has fallen to
zero before disconnecting an inductive load from the output.
We recommend that after running the amplifier at high power for a
period of time disconnect the load, letting the fan run for 10 minutes
to remove any latent heat build up within the unit.
LPA05 User Guide
Quick User Guide
In the following text we describe the use of the LPA05, including
details on the Coupling and bandwidth settings.
Input: The LPA05A features an input impedance of 10kOhms; this
should be considered when using function generators designed for
50Ohm load impedance.
Nominal Gain: The nominal gain of the amplifier is x10
Coupling:
AC + (DC) –This coupling setting will amplify the AC signal at the
input of the amplifier by x10 and simply pass (x1 gain) any DC input
signal.
Example:
Input signal: 1V AC @ 10 kHz + 500mV DC offset
Output Signal: from amplifier: 10V AC @ 10 kHz + 500mV DC offset
AC –This coupling setting will amplify the AC signal at the input of
the amplifier by x10 and attenuate the DC.
AC + DC –AC+DC coupling will amplify both the AC and the DC
components of the input signal.
Example:
Input signal: 500mV AC @ 10 kHz + 500mV DC offset
Output Signal: from amplifier: 5V AC @ 10 kHz + 5V DC offset
Bandwidth:
There are two options for the bandwidth on the LPA05
Low: -3dB @ 85 kHz
High: -3dB @ 1MHz
