Scanivalve MPS4264, Hardware And Software Manual

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MPS4264
Appendix
APPENDIX
Appendix A: Intra-Frame A/D Timing
The rate setting controls the rate that each frame is sampled. The output rate may vary slightly based on the network loading
and latencies. This section describes the timing of each pressure channel within a frame.
The hardware consists of 16 A/D chips, with each chip having 4 inputs. This arrangement produces 64 channels of pressure
data. The 4 A/D channels are read sequentially. The relationship between the A/D chips, A/D channels and the pressure
channels are shown in the map below:
A/D CHIP 1 CHIP 2 CHIP 3 CHIP 4 CHIP 5 CHIP 6 CHIP 7 CHIP 8
CHAN 1 1 5 9 13 17 21 25 29
CHAN 2 2 6 10 14 18 22 26 30
CHAN 3 3 7 11 15 19 23 27 31
CHAN 4 4 8 12 16 20 24 28 32
A/D CHIP 9 CHIP 10 CHIP 11 CHIP 12 CHIP 13 CHIP 14 CHIP 15 CHIP 16
CHAN 1 36 40 44 48 52 56 60 64
CHAN 2 35 39 43 47 51 55 59 63
CHAN 3 34 38 42 46 50 54 58 62
CHAN 4 33 37 41 45 49 53 57 61
The following table shows the timing of the start of each pressure channel A/D sample relative to the start of each frame:
TIME CHAN
TIME
(NOTE 1)
CHAN
TIME
(NOTE 1 & 2)
CHAN
TIME
(NOTE 1)
CHAN
0.0us 1 P/4 + 0us 2 2P/4 + 0us 3 3P/4 + 0us 4
4.4us 5 P/4 + 4.4us 6 2P/4 + 4.4us 7 3P/4 + 4.4us 8
8.8us 9 P/4 + 8.8us 10 2P/4 + 8.8us 11 3P/4 + 8.8us 12
13.2us 13 P/4 + 13.2us 14 2P/4 + 13.2us 15 3P/4 + 13.2us 16
17.6us 17 P/4 + 17.6us 18 2P/4 + 17.6us 19 3P/4 + 17.6us 20
22.0us 21 P/4 + 22us 22 2P/4 + 22us 23 3P/4 + 22us 24
26.4us 25 P/4 + 26.4us 26 2P/4 + 26.4us 27 3P/4 + 26.4us 28
30.8us 29 P/4 + 30.8us 30 2P/4 + 30.8us 31 3P/4 + 30.8us 32
35.2us 36 P/4 + 35.2us 35 2P/4 + 35.2us 34 3P/4 + 35.2us 33
39.6us 40 P/4 + 39.6us 39 2P/4 + 39.6us 38 3P/4 + 39.6us 37
44.0us 44 P/4 + 44.0us 43 2P/4 + 44.0us 42 3P/4 + 44.0us 41
48.4us 48 P/4 + 48.4us 47 2P/4 + 48.4us 46 3P/4 + 48.4us 45
52.8us 52 P/4 + 52.8us 51 2P/4 + 52.8us 50 3P/4 + 52.8us 49
57.2us 56 P/4 + 57.2us 55 2P/4 + 57.2us 54 3P/4 + 57.2us 53
61.6us 60 P/4 + 61.6us 59 2P/4 + 61.6us 58 3P/4 + 61.6us 57
66.0us 64 P/4 + 66.0us 63 2P/4 + 66.0us 62 3P/4 + 66.0us 61
Notes:
1. P = 1 / Rate
2. 8.4us is added to all times in this column due to temperature read during scan.