National Instruments 5441 Bedienungsanleitung PDF herunterladen (Seite 31)

Specification Value Comments

FIR Filter Types

Filter Type Parameter Minimum Maximum —

Custom — — — Coefficients

are provided

by the user.

Flat Passband 0.1

0.43 Lowpass Filter

that minimizes

ripple to:

IQ Rate ×

Passband.

Gaussian BT 0.1 0.9 —

Raised Cosine Alpha 0.1 0.9

Root Raised

Cosine

Alpha 0.1 0.9

CIC (Cascaded Integrator-Comb) Filter

Size 6 Stages The CIC Filter

does the

majority of the

interpolation

in the OSP.

Interpolation

Range

6 ≤ Interpolation ≤ 256 (integers)

NCO (Numerically Controlled Oscillator)

Frequency

Range

1 mHz to (0.43 × Sample Rate) —

Frequency

Resolution

Sample Rate / 2

Example:

355 nHz with a

Sample Rate

of 100 MS/s

I and Q Phase

Resolution

0.0055º —

Phase

Quantization

16 bits Look-Up

Table Address

Width

Tuning Speed 1 ms —

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 43 44

NI 5441 Specifications 1
Direct 50 Ω ±0.500 3
Amplitude 3
± 500 µV 4
For the Direct Path: 4
Sample Clock 14
System Output Jitter 16
Onboard Clock 17
PFI 0 and PFI 1 19
Start Trigger 22
Function Generation Mode 28
Onboard Signal Processing 29
–1.0 to +1.0 Applied after 30
(–1 ≤ Output ≤ +1) 30
Calibration 38
Software 39
Environment 40
CE Compliance 41
Physical 42
Technical Support Resources 43
373846A-01 Feb05 44

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