MSC16VE - Ethernet Readout RAW Data Format V2
Hardware: MSC16VE
MSC16VE payload data is encapsulated in M-Stream 2.2 protocol using Data Subtype 2.
Unlike MSC Ethernet Raw Data Format V1, in data format version 2 only data from one channel transmits per one packet
MSC16VE Ethernet Readout Data Format |
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word # |
byte offset |
bits |
description |
0-1 |
0 |
31:0 |
M-Stream header, 2 words |
2-3 |
0 |
31:0 |
M-Stream subtype 2 header, 2 words |
M-Stream User Payload, subtype 2 |
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4 |
16 |
31:0 |
Timestamp of slice #0 in packet, TAI seconds |
5 |
20 |
31:2 |
Timestamp of slice #0 in packet, TAI nanoseconds |
1:0 |
Timestamp of slice #0 in packet, TAI flags |
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6 |
24 |
31:28 |
MSC Data Version (*) |
27:16 |
reserved |
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15:12 |
External count conditions number (Nce) |
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11:4 |
Channel number |
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3:0 |
Counter bits number (Nb) |
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7 |
28 |
31:0 |
Slice interval, nanoseconds |
8 |
32 |
31:0 |
Missing hits during suspend (**) before current packet |
9 |
36 |
31:0 |
MSC time slice data words |
... |
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N |
4*(N-1) |
31:0 |
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- (*) - in raw data this number is one less than data version
- (**) - suspend occurs if channel buffer for stream data if full (not enough space for new mstream packet)
MSC time slice data word format
Time slice data word |
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Bits |
31 .. (Nce+Nb) |
Nce-1 .. Nb |
Nb-1 .. 0 |
Description |
Time slice number |
External count |
Channel counter |
Nce - number of external count conditions inputs
Nb - number of counter bits
Time slice data can be suppressed if both next conditions are met:
- channel counter is zero for current time slice
- external count conditions did not changes since beginning of previous time slice