FE768PF Front Sheet Colour - Fylde Electronic Laboratories Ltd.

FE768PF Front Sheet Colour - Fylde Electronic Laboratories Ltd.
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FE-768-PF
programmable filter
ACTIVE
FILTER
status
Offset +
Offset
-
The FE-768-PF provides eight selectable cut-off frequencies
over a 10 Hz to 20 kHz range. The passband and phase
response (Butterworth, Bessel, or Chebschev) may also be
specified when ordering. A High Pass or Low Pass 8 pole
configuration is jumper selectable. A 4 pole bandpass
response which is flat between the two cut off frequencies
may also be jumper selected.
Each filter has a differential input stage and programmable
overall gain from 1 to 50 in six steps, which allows the filter to
be coupled directly to many signal sources without the need
for additional conditioning.
Calibration facilities include both an end to end test which
switches through an external single ended signal in place of
the differential input, and the selection of a DC +10 Volt level
at the output.
The module is compatible with other FYLDE programmable
instrumentation modules and occupies only one slot in a 16
channel rack.
Computer control is normally via the 17th module in the rack
which is typically an IEEE 488 interface module (FE-705-IB).
If required modules may be directly connected to a host
computer since they are commanded via an asynchronous
serial bus.
FYLDE
FE768PF
The filter produces a ±10 V output, suitable for direct
connection to a data acquisition board, and may be either
mains or optionally 12V DC powered using the FE-605-DCC
in place of each individual mains transformer.
Electronic Laboratories Ltd., 49/51 Fylde Road Preston PR1 2XQ, England Phone 01772 257560 Fax 01772 821530
R
FE-768-PF Specification
Issue 2 Feb 2004
FE-768-PF
PROGRAMMABLE FILTER
Description
A Programmable Filter in Euro Card format. The FE-768-PF features a programmable gain differential input stage,
low or high pass filter choice (by internal link) and programmable gain output stage. Sixteen modules will fit a
standard 19” crate, leaving space for a RS232 controller card. (Type FE-705-SB). The filter is 8 pole (48dB/octave) and may be ordered as Butterworth or Bessel response. Cut off frequencies range from 10 Hz to 30
kHz in 8 steps. The module provides a ±10V output ready to interface with a suitable data acquisition system.
System rear panel connectors are generally 3 pin Tuchel screw lock connectors where differential connection is
required, or BNC connectors. BNCs, or “D” type multi-way connectors, are recommended for output use.
Specification
INPUT
resistance
offset voltage
current
protection
filter
voltage drift
coupling
>100kΩ single ended,> 200kΩ differential
<2 mV warmed up
<1 nA
±30v protection
capacitors limit high frequency noise pick-up
<10µV / °C
low pass filter may be ordered with capacitive input coupling,
0.5 Hz (-3 dB)
100µV pk. - pk. R.T.I. (note 1)
x1 or x10 programmable
<±0.2%
better than 0.02% / °C
>50 dB DC - 1 kHz (±10V)
voltage noise
gain
error
stability
CMR
FILTER
response
8 pole Butterworth or Bessel to order
( -48dB/octave, -160 dB/decade).
may be configured on board using jumper links.
May be configured as 4 pole band pass on board.
cut off frequency (-3 dB) typically ±1 % of selected value.
8 selectable cut off frequencies
(10 Hz , 30 Hz, 100 Hz, 300, 1 kHz, 3 kHz,10 kHz, 30 kHz)
Low or High pass
Band Pass
accuracy
range
OUTPUT
gain
error
noise
offset
impedance
protection
calibration
1
2
offset indication
STATUS
indicator
POWER SUPPLY
ENVIRONMENTAL
x1, x2 or x5 programmable
<±0.2%
< 1 mV pk. - pk. (note 1)
< ±10mV any setting.
<0.1Ω (note 2)
continuous short circuit.
+10V output cal. level on command
External single ended cal. input selectable on command.
Using two LEDs. Thresholds set to ±7V
LED indicator normally lit, will extinguish on reception of an
illegal command
220V-240V 50/60 Hz or 110V-120V 50/60 Hz
12V D.C. by fitment of FE-605-DCC D.C. converter.
temperature range
0 to 50 °C
DIMENSIONS
panel 3u x 5HP, PCB 160 mm x 100mm.
card and panel, DIN 41612 (C Body) edge connector.
PROGRAMMING
Gain, filter, Input cal and Output calibration by RS232C serial
rack interface (17th module).
Notes
1.
2.
Measurement bandwidth 50 kHz.
Module only, excluding backplane wiring and rear panel connectors.
FYLDE Electronic Laboratories Ltd.
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