Sine spectral purity, Filter characteristics – National Instruments 5411 User Manual
Page 55
Appendix A
Specifications
DAQArb 5411 User Manual
A-2
© National Instruments Corporation
Output attenuation .............................. 0 to 73 dB
Resolution ................................... 0.001 dB steps
Pre-attenuation offset
Range .......................................... ±2.5 V into 50
Ω
(but with less than 10 dB of
attenuation, signal maximum plus
offset (before attenuation) must not
exceed ±5 V (into 50
Ω))
Accuracy ..................................... ±5 mV
Output coupling ................................ DC
Output impedance ............................. 50
Ω
or
75 Ω
software selectable
Load impedance ................................ 50
Ω
or greater
Output enable ..................................... Software switchable
Protection ........................................... Short-circuit protected
Sine Spectral Purity
Harmonic products and spurious
up to 1 MHz ................................ –60 dBc
up to 16 MHz .............................. –35 dBc
Phase noise......................................... –105 dBc/Hz at 10 kHz from
carrier
Filter Characteristics
Digital
Type ............................................ Half-band interpolating
Selection...................................... Software switchable
Taps ............................................ 67
Filter coefficients ....................... Fixed 20-bit
Data interpolating frequency ...... 80 MS/s
Pipeline signal delay ................... 26 sampling periods
Note:
The digital filter will be operational only for sample rates of 40 MHz and
20 MHz. For other sample rates, the digital filter will not be of any use.