Polytec OFV-3001, User Manual

Page: 62 / 101

7-2
7 Technical Specifications
7.1.3 Low Pass Filter
For typical amplitude and phase frequency response, refer to section 4.2.2 .
7.1.4 Signal Voltage Output VELOCITY OUTPUT
General Data
Measurement Ranges
Filter type: Bessel 3rd order
Cutoff frequencies: 5 kHz, 20 kHz, 100 kHz, adjustable
Frequency roll-off:
−
60 dB / dec =
−
18 dB / oct
Stop band rejection: > 70 dB
Output swing: 20 V
p-p
Output impedance: 50
Ω
Minimum load resistance: 10 k
Ω
(
−
0.5% additional error)
Overrange indicator threshold: typ. 95% of full scale
Maximum DC offset:
±
20 mV
Velocity
decoder
Measurement
range
Full scale
output
Resolution
1
1
Resolution is defined as the signal amplitude (rms) at which the signal-to-noise ratio is 0 dB in a 10 Hz
spectral bandwidth (RBW), measured at 3M Scotchlite Tape

.
Maximum
frequency
2
2
- 1 dB maximum error
Maximum
acceleration
(scaling factor) (peak - peak)
kHz g
OVD-01 1 20 0.3 20 150
(PLL) 5 100 0.6 50 1,600
25 500 0.8 50 8,000
125 2,500 1.0 50 25,000
1,000 20,000 2.0 50 200,000
OVD-02 5 100 0.5 250 8,000
(HF) 25 500 1.5 1,500 240,000
125 2,500 2.0 1,500 1,200,000
1,000 20,000 5.0 1,500 9,600,000
mm
s
----------
V
⁄
mm
s
----------
µ
m
s
---------