ACT9300SSC View Datasheet(PDF) - Advanced Crystal Technology
Part Name
Description
MFG CO.
'ACT9300SSC' PDF : 6 Pages View PDF
Tel :
Fax :
email :
+44 118 979 1238
+44 118 979 1283
info@actcrystals.com
ACT9300SSC
Spread Spectrum principle (continued from page 2)
Spread Spectrum Clock (SSC), the mode energy of a spread spectrum clock is spread over a wider
bandwidth, resulting from the frequency modulation technique. The modulation carrier frequency is in
the KHz range which makes the modulation process transparent to the oscillator frequency. The
controlled modulation process can be on all of one side of the nominal frequency (DOWN SPREAD)
or equally spread either side of the nominal frequency (CENTRE SPREAD) . If OVER-CLOCKING is
a problem to the system then the down spread is preferred.
Instantaneous Frequencies (100MHz Nominal Frequency)
Total Spread %
0.5%
1%
3%
Down Spread
Centre Spread
Min
Max
Min
Max
Down Range
Up Range
Down Range
Up Range
-1.0%
0%
-0.25%
+0.25%
-5000ppm
0ppm
-2500ppm
+2500ppm
99.500000
100.000000
99.750000
100.250000
Note. Tri State not available with 0.5% versions.
-1.0%
0%
-0.5%
+0.5%
-10000ppm
0ppm
-5000ppm
+5000ppm
99.000000
100.000000
99.500000
100.500000
-3.0%
0%
-1.5%
+1.5%
-30000ppm
0ppm
-15000ppm
+15.000ppm
97.000000
100.000000
98.500000
101.500000
EMI Reduction Data
Main mode: EMI reduction:
( ) Total spread % x frequency (fo)
10Log
0.12
dB
3rd Harmonic: EMI reduction:
( ) 10Log
Total spread % x frequency(fo)x3
dB
0.12
5th Harmonic: EMI reduction:
( ) Total spread % x frequency(fo)x5
10Log
0.12
dB
In line with our ongoing policy of product evolvement and improvement, the above specification is subject to change without notice.
ISO9001: 2000 Registered
For quotations or further information please contact us at:
3 The Business Centre, Molly Millars Lane, Wokingham, Berks, RG41 2EY, UK
http://www.actcrystals.com
Issue:2 M6
Date:26/10/05
3 of 6
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