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Table 11:

LFI characteristic internal frequencies.

$\nu$ 		Origin Unit
1 Hz............... Housekeeping acquisition frequency DAE BEU
1 Hz Synchronisation signal DAE BEU, REBA
10 Hz............... Internal timer SCS
1 kHz............... Locking clocks SCS
4096 Hz............... Phase Switch FEM, DAE BEU
100 kHz............... 5 V & 12 V DC/DC SCS
131 072 Hz............... DC/DC converters DAE Power box
131 072 Hz............... On-board clock signal DAE BEU, REBA
131 072 Hz............... LOBT clock SCS
200 kHz............... 12 V DC/DC SCS
1 MHz............... Command link from the BEU box DAE power box
1 MHz............... Internal transfer of digital data DAE BEU, REBA
8 MHz............... ADC clock SCS
10/80 MHz............... 1355 serial data digital interface DAE BEU, REBA
16 MHz............... DSP processor clock SCS
17.46 MHz............... Clock frequency of the DSP REBA
20 MHz............... Sequencer internal clock DAE BEU


 

Table 12: LFI data rate summary.

30 GHz 44 GHz 70 GHz
Number of detectors............... 8 12 24
Angular resolution (nominal)............... 33 $^{\scriptscriptstyle\prime}$ 24 $^{\scriptscriptstyle\prime}$ 14 $^{\scriptscriptstyle\prime}$
Beam crossing time [ms]............... 92 64 39
Sampling rate [Hz]............... 32.51 46.55 78.77
Science data rate [Kbps]............... 8.32 17.87 60.49
Total science data rate...............   86.69 Kbps  
after compression...............   36.12 Kbps  
Total LFI data rate...............   45.41 Kbps  


Source LaTeX | All tables | In the text

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