Introduction
PHOTON
+
System Guide 5
Specifications
Inputs
Analog channels Two standard, expandable to four channels. All are differential inputs with
1M Ohm impedance. Setup allows per channel selection of gain (x0.01, .0.1,
x1, x10), transducer sensitivity, sensor type (e.g., acceleration, force, pressure,
etc.), and coupling (AC, DC, ICP
TM
).
Electronics Differential amplifier, programmable gain amplifier, anti-aliasing filters, and
24-bit Analog to Digital Converter (ADC).
Filtering An analog filter at 300 kHz plus a 160 dB/octave linear-phase digital filter
prevent aliasing and phase distortion.
Frequency range Up to 84.2 kHz analysis frequency (192 k samples per second).
Voltage range +10 V
peak
Signal conditioning Voltage or ICP sensor power (2.4 mA, 22 V
peak
open circuit)
Maximum input +36 V
peak
without damage
Resolution 24-bit
Dynamic range 115 dBfs
(two tone test, 100 linear averages)
Accuracy +0.15 dB
Channel match
Amplitude
Phase
Within +0.04 dB
Within +0.5 degree
(from DC to 21 kHz, frequency response measurement, both inputs on the
same input range, linear average)
Alias protection >117 dB stopband rejection
Signal-to-noise >90 dB (from DC to 1000 Hz measured with half-full-scale sine wave).
Total Harmonic
Distortion
< -95 dBfs
Frequency accuracy Within 0.01%
Output
Analog channels Waveform Source standard.
Electronics 24-bit Digital to Analog Converter (DAC) with anti-imaging filter.
Filtering A 160 dB/octave digital filter plus an analog filter prevent imaging and phase
distortion.
Frequency range Up to 42 kHz output frequency (96k samples per second).
Voltage range +10 Vpeak
Resolution 24-bit
Dynamic range 110 dBfs
Total Harmonic
Distortion
<-95 dBfs
Output impedance
50 Ω
Maximum current 24 mA
peak
All Specifications subject to change without notice.
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