BROADBAND`LINEAR`AMPLIFIER WITH`A±B`INPUTS`AND

ELECTRONICS AB
WWW.FLCE.SE
BROADBAND'LINEAR'AMPLIFIER
WITH'A±B'INPUTS'AND'DC5OFFSET
Model&A800X
&
HIGH&VOLTAGE&
FIXED&GAIN&
BROADBAND
&
800Vpp&60mA&
100x&
DC&to&ca&200&kHz
&
LOW&OUTPUT&IMPEDANCE&
HIGH&SLEW&RATE
&
<0.1&Ω&
300&V/µs
FLC Electronics AB
Sippedalsvägen 8
S - 433 31 Partille, Sweden
Tel. +46 31 741 2631
Fax +46 31 44 61 10
Fax +46 31 41 75 30
VAT No. SE556506606401
Email flce@flce.se
Web http://flce.se
ELECTRONICS AB
WWW.FLCE.SE
GENERAL'DESCRIPTION
The A800X is a broadband high voltage linear amplifier equipped with two inputs
(marked +A and ±B, respectively). The output is a sum or difference of supplied signals,
amplified x100, as shown in the following example:
The inverting or non-inverting function of the input B is chosen using a switch on the
front panel. The inputs, when used separately, allow the unit to act as inverting or noninverting amplifier. Any function or arbitrary waveform generator or any other signal
source with a voltage up to ±4 V can be used as an input device.
By means of another switch the output can be attenuated 100 times (-40dB) for safe
handling.
A DC level, adjustable within 0...+5V range, is provided on the front panel from two
BNC contacts marked “OFFSET OUT”. Both contacts are internally connected to
simplify monitoring of the output. For bipolar operation the DC level should be supplied
to ±B input. The digits on the knob are for orientation purpose only and correspond to ca
5mV/unit. For example, if the knob shows “500” then the DC-offset should be ca 2.5V,
repeatable within ca ±1%.
Please note that the maximum total amplitude of superposed A and B signals should
normally stay within ±4V range, otherwise clipping will occur. An exception from this
rule is a situation where the resulting A±B signal is within ±4V range. The input signals
A800X
page 1
ELECTRONICS AB
WWW.FLCE.SE
A and B must still be within ±10V range. An example of such situation is illustrated on
the next screen shot:
The amplifier outputs high voltage signals at high frequency. It is, thus, imperative for the
safe operation that the user understands the possibilities and limitations of the
instrument.
INPUT'AMPLITUDE
The amplitude of the input signal should normally be kept within ±4 V. The input
protection network limits the signal amplitude delivered to the power amplifier to a safe
value. It also effectively cuts accidental spikes and overshoots. However, large and
prolonged overvoltage at the input may blow the microfuse in the input protection circuit.
A800X
page 2
ELECTRONICS AB
WWW.FLCE.SE
TROUBLESHOOTING
Problem
Condi,on
Solu,on
No output
Power switch does not lit
Front panel LED is off
Check the mains fuse
located on the back
Small output
Front panel LED is off
Output attenuation switch
is in “-40dB” position
No output or very small,
distorted signal
Power switch OK
Check the input microfuse
located inside the device.
Constant high voltage
output
Without any input signal
Amplifier failure.
Contact flce@flce.se
You should suspect a blown input microfuse if the output is about zero or the amplifier is
producing a very low voltage, distorted copy of the input signal (due to the capacitive
coupling through the blown fuse). Make sure that output is not attenuated!
Spare microfuse is provided inside the instrument. They look like small metal cans and
are placed in white holders. The resistance of a good fuse is in the order of 46 ohm. It is
imperative to disconnect the power cable and wait at least a minute before opening the
case. If possible, contact info@flce.se for advice.
Kee p the sum of input signals within ±4 V range.
N eve r c onnec t a hig h volta ge output to a ny input or output of the
instr ument!
LOAD
The amplifier is intended to drive resistive and/or small capacitive loads. The maximum
capacitive load depends on the slew rate of the amplifier. The slew rate is normally set at
the factory to 300 V/µs which is appropriate for a small load (for example 5 kΩ in series
with 100 pF). Due to the output current limit (60 mA) the slew rate at higher load of
300 pF drops to ca 160 V/µs rising edge and ca 100 V/µs falling edge. This load includes
the capacitance of the connection cable (ca 100 pF/m for a standard coaxial cable).
Increasing the capacitive load causes overshoot to appear. If a larger capacitive load is
required, and the overshoot is not acceptable, then the slew should be reduced
accordingly. Such an adjustment may be performed by qualified personnel and the
A800X
page 3
ELECTRONICS AB
WWW.FLCE.SE
factory should be contacted for advice (preferably by email info@flce.se ). Inside the
cabinet exist hazardous voltage levels and the amplifier circuit is sensitive to static
discharge.
FLC Electronics AB recommends to monitor the output signal of the amplifier with an
oscilloscope. It is then important to use a low capacitive probe with a division factor of at
least 1/100 (please note also the maximum voltage that can be connected to the
oscilloscope input and that can be handled by the probe).
O ve r l o a d i n g t h e o u t p u t m ay c a u s e a n ove r s h o o t w h i c h m i g h t b e
d a n ge ro u s f o r co n n ect ed d ev ic e s.
The amplifier cannot be used to drive a purely inductive load.
The continuous output current limit is 60 mA and the output power limit is 30 W. The
output is equipped with a current limiting circuit that withstands accidental short-circuits.
Prolonged short-circuiting may result in overheating the amplifier.
The amplifier may be overheated when the output is shor t-circuited for a
l o n g t i me.
A800X
page 4
ELECTRONICS AB
WWW.FLCE.SE
FREQUENCY'RESPONSE
1"
10"
100"
1000"
1"
without"load"
load"300"pF"
10"
Frequency*[kHz]*
100"
1000"
The graph below shows full-scale frequency response of A800X witout load and with
300 pF pure capacitive load, respectively:
Amplitude*peak-to-peak*[V]*
A800X
page 5
ELECTRONICS AB
WWW.FLCE.SE
SUMMARY'OF'TECHNICAL'DATA
Bandwidth:
Amplification:
Load:
type
max
Impedance:
input
output
Voltage:
input
Current:
output
Slew Rate:
output
Input protection fuse
DC-offset range
Operating Ambient Temperature:
Storage Temperature:
Relative Humidity:
Power Requirements:
Fuse:
Dimensions (H/W/L):
Weight:
Country of Origin:
DC to about 200 kHz at 800 Vpp
100 times
resistive || capacitive
capacitive load 300 pF
1 MΩ || 30 pF, custom values possible
<0.1 Ω in the linear mode
nominal ±4 V
maximum 60 mA
ca 300 V/µs without load
(different adjustments available on request)
15 mA (Littelfuse, part number 272.015)
one spare fuse provided inside the instrument,
additional fuses available from Littelfuse
resellers or from FLC Electronics AB.
0..+5V
0°C to 30°C
0°C to 60°C
up to 90% (operation)
30% to 50% (storage)
100/110 V or 220/230 V, 50/60 Hz
100/110 V: 3.15 A (slow),
220/230 V: 2 A (slow)
112 x 255 x 316 (mm)
4 kg
Sweden
N ot e: Specifications apply to instruments operating at 23°C±5°C ambient temperature
after 15 min. warm-up time. Due to ongoing product development, specifications are
subject to change without notice.
WARNING It is not allowed to connect the 100...230V AC line power input of the
amplifier to DC-AC converters or solid state AC generators with non-sinusoidal output.
Data sheet revision date: 16 May, 2014
A800X
page 6
ELECTRONICS AB
WWW.FLCE.SE
WARRANTY
F LC Electr onics wa r r a nts tha t this pr oduct will b e fr ee fr om defects i n
ma te r i a ls a nd wor kma ns hip for a per iod of two yea r s fr om the da te of the
shipment.
If any such product proves defective during this warranty period, FLC Electronics, at its
option, either will repair the defective product without charge for parts and labour, or will
provide a replacement for the defective product. In order to obtain service under this
warranty, Customer must notify FLC Electronics of the defect before the expiration of
the warranty period and make suitable arrangements for the performance of the service.
Customer shall be responsible for packing and shipping the defective product to the
service center designed by FLC Electronics, with shipping charges prepaid. FLC
Electronics shall pay for the return of the product to the Customer if the shipment is to a
location within the country in which the FLC Electronics service center is located.
Customer shall be responsible for paying all shipping charges, duties, taxes, and any other
charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or
inadequate maintenance and care. FLC Electronics shall not be obligated to furnish
service under this warranty:
• to repair damage resulting from attempts by personnel other than FLC Electronics
representatives to install, repair or service the product;
• to repair damage resulting from improper use or connection to incompatible equipment;
• to service a product that has been modified or integrated with other products when the
effect of such modification or integration increases the time or difficulty of servicing
the product.
This warranty is given by the FLC Electronics with respect to this product in lieu of any
other warranties, expressed or implied. FLC Electronics and its vendors disclaim any
implied warranties of merchantability or fitness for a particular purpose. FLC
Electronics’ responsibility to repair or replace defective products is sole and exclusive
remedy provided to the customer for breach of this warranty. FLC Electronics and its
vendors will not be liable for any indirect, special, advance notice of the possibility of
such damages.
The instrument may generate hazardous voltage levels! It should be operated by qualified
personnel only. The instrument is to be used in normal room temperature and humidity.
The manufacturer cannot be held responsible for damage to any device connected to the
instrument. It is recommended that samples or equipment sensitive to voltage spikes are
disconnected from the high-voltage outputs when turning the power to the instrument ON or
OFF.
A800X
page 7
ELECTRONICS AB
WWW.FLCE.SE
I M P O R T A N T
Inside the amplifier case exist dangerous voltage levels.
The amplifier cannot be used to drive an inductive load.
The instrument cannot be powered from a DC-AC converter
nor from a solid-state AC generator with non-sinusoidal
output.
Loads sensitive to voltage transients should be disconnected
from the amplifier during power-up and power-down.
Never connect the output to the input of the amplifier!
The amplifier may be overheated if the output is shortcircuited for a long time.
It is recommended to monitor the output signal of the
amplifier on the oscilloscope.
A800X
page 8
ELECTRONICS AB
WWW.FLCE.SE
E C ' D e c l a r a t i o n ' o f ' C o n f o r m i t y'
We
FLC Electronics AB
Sippedalsvägen 8
SE-43331 Partille
Sweden
declare under sole responsibility that the
Voltage Amplifier A800X
meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility (EMC) and
Low Voltage Directive 73/23/EEC (LVD). Compliance was demonstrated to the
following standards as listed in the official Journal of the European Communities:
EN 50081-1
EN 55022
EN 55022
Generic Emissions
Conducted emission (interference voltage), class B
Radiated emission (electric field), class B
EN 50082-1
EN 61000-4-4
EN 61000-4-2
EN 61000-4-3
Generic Immunity
Electrical fast transient/burst
Electrostatic discharge
Radiated E-fields (radio frequency)
EN 61010-1:2010
Electrical Safety
Tomasz Matuszczyk, PhD
Technical Director
FLC Electronics AB
May 8, 2014
A800X
page 9