Polytec MSA-600 - Page 91

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6 Technical Specifications
Table 6.3: Metrological properties of the MSA-600-X/-U without MSA-A-DIF option
Table 6.4: Metrological properties of the MSA-600-X/-U with MSA-A-DIF option, non-differential measurement
with internal reference
Table 6.5: Metrological properties of the MSA-600-X/-U with MSA-A-DIF option, differential measurement
Table 6.6: Frequency of spectral impurities
MSA-600-X MSA-600-U BWX1 BWX2
Resolution (averaged)
1 2
f
min
…1 MHz
100 100 - -
1MHz…f
max
7.5 7.5 12.5 12.5
Number of spectral impurities
> 10 pm (typ.)
1277
MSA-600-X MSA-600-U BWX1 BWX2
Resolution (averaged)
1 2
f
min
…1 MHz
100 100 - -
1MHz…f
max
15 15 25 25
Number of spectral impurities
> 10 pm (typ.)
1155
MSA-600-X MSA-600-U BWX1 BWX2
Resolution (averaged)
1 2
1
The noise-limited resolution is defined as the signal amplitude (rms) at a signal-to-noise ratio of 0 dB and a spectral resolution
of 1 Hz.
2
The attainable resolution is frequency-dependent. The specified values are average values across the given bandwidth. The
resolution has been determined under laboratory conditions on a mirror with the aid of the Hanning window.
f
min
…1 MHz
100 100 - -
1MHz…f
max
30 30 50 50
Number of spectral impurities
> 10 pm (typ.)
1144
MSA-600-X MSA-600-U BWX1 BWX2
Freq. of spectral impurities (typ.)
1 2
1
The data refer to the frequency specifications of the Bragg cell 308 MHz ±6 MHz. The exact frequencies of the spectral
impurities depend on the individual frequency of the Bragg cell. Contact Polytec for further information. The amplitudes and
frequencies of the spectral impurities depend on the signal level. The specified frequencies occur at high signal levels.
2
Higher signal levels result in higher spectral impurities at these frequencies. The spectral impurities printed in bold can reach
amplitudes > 1 nm at high signal levels. These spectral impurities are generally modulated with two other spectral impurities
spaced about ±700 kHz apart.
0.7 0.7 308 ±6 1304 ±72 MHz
36
∓ 48 36 ∓ 48 616 ±12 1540 ±56 MHz
308 ±6 652
∓ 36 1848 ±36 MHz
1232 ±24 1884 ±12 MHz
1268
∓ 24 1920 ±60 MHz
1304 ±72
2464 ±48 MHz
2500 MHz