PF-1U-FA Multi-Channel Programmable Filter/Amplifier System
The PF-1U-FA Multi-Channel Programmable Filter/Amplifier System is ideal for conditioning low-level voltage inputs in front of high-resolution digital data acquisition systems.
Fully programmable 8-channel and 16-channel configurations are available in standard or high-performance models. A choice of 4 and 8-pole filter characteristics is available in low-pass and band-pass configurations. Fully programmable gain is distributed around the filter to reduce the possibility of clipping on out-of-band signals.
PF-1U-FA Description
The PF-1U-FA series is a multi-channel programmable filter/amplifier system in a compact rack mountable or benchtop package. Fully programmable 8-channel and 16-channel configurations are available in high performance or standard configurations with a selection of input connector configurations.
For units with BNC input connectors, an optional programmable current source is provided on each channel to interface the PF-1U to IEPE transducers.
For applications requiring balanced twisted/shielded cable inputs, a LEMO connector input option is available. Fully programmable input configuration (single-ended or differential) is supported for systems configured with LEMO input connectors.
Standard PF-1U-FA Model
The standard PF-1U-FA configuration offers 4-pole low-pass filters with five programmable cutoffs and gain programmable to x1,024.
High-Performance PF-1U-FA Model
The high performance PF-1U-FA offers a choice of 4 or 8-pole low-pass and band-pass filters with cutoffs programmable from 1 Hz to 204.6 kHz. The high performance PF-1U-FA has an upgraded wideband (500 kHz) low-noise amplifier with transducer DC suppress capability. Gain is programmable to x8,192.
System Control
The PF-1U-FA system is controlled via an Ethernet interface using the supplied spreadsheet-style application running on a Windows PC. The GUI supports control of all channel and system features and allows for group control of channels. Up to eight PF-1U-FA systems can be controlled by one GUI. The settings are retained when the host PC is disconnected and the system powered down, allowing the unit to be pre-configured for an application in which PC control is not available.
PF-1U GUI
Innovative Technologies and Features
Pre-Filter and Post-Filter Gain
The PF-1U-FA amplifier gain is distributed both before and after the filter to provide protection from large out-of-band energy or transients that could cause clipping before the filter, distorting the data...
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The PF-1U-FA amplifier gain is distributed both before and after the filter to provide protection from large out-of-band energy or transients that could cause clipping before the filter, distorting the data. The post-filter gain has resolution of better than 0.05% to enable system scaling of the outputs to match the full-scale input of the external recording device. Overload detectors alert the user to over-voltage conditions.
Flat/Pulse Low-Pass Filter Technology
The PF-1U-FA low-pass filters may operate in either a “flat” mode for maximally flat pass-band amplitude response with sharp roll-off or in a “pulse” mode for low phase distortion...
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PF-1U-FA low-pass filters may operate either in a flat mode, for maximally flat pass-band amplitude response with sharp roll-off, or in a pulse mode, for low phase distortion and optimized transient response. Flat mode provides passband characteristics nearly identical to a Butterworth filter while providing a much sharper roll-off. This mode is a good choice for applications such as spectral analysis. Pulse mode has time-domain response similar to the Bessel filter yet provides superior amplitude response characteristics. Pulse mode is ideal for time-domain applications, including transient (shock) measurements and waveform analysis.
PF-1U-FA Salient Features
PF-1U-FA Common Features:
Number of Channels:
16 (PF-1U-16FA)
8 (PF-1U-8FA)...
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Input Connectors:
- Standard: Individual isolated BNC’s at front panel
- Option I: Individual BNC input with programmable (IN/OUT) 6mA current source with 26 V compliance for powering IEPE transducers
- Option 3: Individual isolated LEMO front panel input connectors. Programmable single-ended or balanced differential input
Output Connectors:
- Individual isolated BNC’s at rear panel
Inputs:
- Balanced differential input with programmable AC/DC coupling
Outputs:
- DC coupled, single-ended
Test Support:
- Test input and monitor output busses
Input Power:
- 12 to 24 VDC external AC to DC power supply provided with unit
Control:
- Ethernet remote control
- Local control via supplied Window based Graphical User Interface (GUI)
- Store up to four setups in non-volatile RAM allowing pre-configured applications
Comparison of Precision Filter/Amplifier Products
PFI Filter-Amplifier Comparison Chart
| System or Card | PFA-2 Filter/Amplifier System | PF-1U-FA High-Performance Filter/Amplifier System | PF-1U-FA Standard-Performance Filter/Amplifier System | 28608B 8-Channel 200 kHz Filter/Amplifier Card | 28618 8-Channel 200 kHz Filter/Amplifier Card | 28612 2-Channel 3 MHz Filter/Amplifier Card |
|---|---|---|---|---|---|---|
| Channels | 2 per System | 8 (PF-1U-8FA) or 16 (PF-1U-16FA) per System | 8 (PF-1U-8FA) or 16 (PF-1U-16FA) per System | 8 per Card, Up to 128 per 28000 System | 8 per Card, Up to 128 per 28000 System | 2 per Card, Up to 32 per 28000 System |
| Inputs | Balanced Differential Inputs w/ Programmable AC/DC Coupling | Balanced Differential Inputs w/ Programmable AC/DC Coupling; IEPE Current Source with Option I | Balanced Differential Inputs w/ Programmable AC/DC Coupling; IEPE Current Source with Option I | Balanced Differential Inputs w/ Programmable AC/DC Coupling | Balanced Differential Inputs w/ Programmable AC/DC Coupling | Programmable Single-ended (SE)/Differential Input with Programmable AC/DC Input Coupling (10 Hz or 100 Hz) |
| Filter | 6-Pole Flat/Pulse Low-Pass; 2-Pole High-Pass with Option H | 4-Pole or 8-Pole Flat/Pulse Low-Pass or 8-Pole Band-Pass | 4-PoleFlat/Pulse Low-Pass | 4-Pole or 8-Pole Flat/Pulse Low-Pass or 8-Pole Band-Pass | 4-PoleFlat/Pulse Low-Pass | 6-PoleFlat/Pulse Low-Pass |
| Gain | Pre-filter Gain: x1 to x128 in x2 Steps | Post-filter Gain: x1/16 to x16 with 0.025% Resolution | Pre-filter Gain: x1 to x512 in x2 Steps | Post-filter Gain: x0.25 to x16 with 0.05% Resolution | Pre-filter Gain: x1 to x512 in x2 Steps | Post-filter Gain: x0.5 to x16 with 0.05% Resolution | Pre-filter Gain: x1 to x512 in x2 Steps | Post-filter Gain: x1/16 to x16 with 0.05% Resolution | Pre-filter Gain: x1 to x64 in x2 Steps | Post-filter Gain: x1/16 to x16 in Binary Steps with 0.05% Resolution | x1, x2, x5, x10, x20, x50, x100, x200, x500, x1000 |
| Filter Cutoff Frequencies | 5 Hz to 2.555 kHz in 5 Hz Steps | 2.75 kHz to 127.5 kHz in 250 Hz Steps | Flat Mode: 2 Hz to 2.046 kHz in 2 Hz steps; 2.2 kHz to 204.6 kHz in 200 Hz Steps (w/ Bypass Option) | Pulse Mode: 1 Hz to 1.023 kHz in 1 Hz steps; 1 kHz to 102.3 kHz in 100 Hz Steps (w/ Bypass Option) | FX02: 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz | Flat Mode: 2 Hz to 2.046 kHz in 2 Hz steps; 2.2 kHz to 204.6 kHz in 200 Hz Steps (w/ Bypass Option) | Pulse Mode: 1 Hz to 1.023 kHz in 1 Hz steps; 1 kHz to 102.3 kHz in 100 Hz Steps (w/ Bypass Option) | FX02: 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz | 5 kHz to 315 kHz in 5 kHz Steps | 350 kHz to 3.15 MHz in 50 kHz Steps |
| Outputs | DC-coupled, Single-ended (SE) | DC-coupled, Single-ended (SE) | DC-coupled, Single-ended (SE) | Single-ended (SE) with Ground Sense | Single-ended (SE) with Ground Sense | Single-ended (SE) |