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operations:documentation.ivs.mark5mode [2016/07/13 03:00]
Nick Ham [Sampling Rate]
operations:documentation.ivs.mark5mode [2018/02/27 05:19]
Warren Hankey
Line 1: Line 1:
 +===Mode Modern===
 +for Mark5B machines,
 +mode? now returns mk5b_mode=ext,<​bitmask>,,<​sampling>​
 +
 +sampling is rate (1 or 2 GB/s) times twice (Nyquist) bandwidth of 2,4,8,16 MHz gives 4,8,16,32 or 64
 +
 +bitstream mask 0xffffffff is 11111111 11111111 11111111 11111111 so all 32 bitstreams are taken. There are sixteen channels so two values per channel sign (positive/​negative 1/0), and amplitude (high/low 1/0) give 32 bitstreams (2-bit samples). Bitstream mask 0x55555555 is 01010101 01010101 01010101 01010101 means unsigned, just amplitude for 16 channels (1-bit samples).
 +
 +data rate is (2 x bandwidth) x (16 channels)
 +e.g. ks experiment 64 x 16
 +
 For VSI recording, 1-bit sampling and 8 MHz bandwidths (e.g. R1 and R4 experiments):​ For VSI recording, 1-bit sampling and 8 MHz bandwidths (e.g. R1 and R4 experiments):​
 <​code>​mk5=mode=ext:​0x55555555:​2</​code>​ <​code>​mk5=mode=ext:​0x55555555:​2</​code>​
/home/www/auscope/opswiki/data/pages/operations/documentation.ivs.mark5mode.txt · Last modified: 2018/02/27 05:19 by Warren Hankey