Rohde & Schwarz RTE Series - SENT Slow Channel

Protocol analysis
R&S
®
RTE
733User Manual 1326.1032.02 ─ 20
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Data Pulses (Nibbles)
– one up to six 4 bit data nibbles
– 12 to 27 clock ticks pulse period
– initial logic 0 time with ≥5 ticks, subsequent logical 1 with variable duration
●
CRC/Checksum
– one 4 bit pulse
– used for error checking of data nibbles (status nibble not included)
– detects single bit, odd number of nonconsecutive and single burst errors
●
Pause Pulse
– one optional pulse
– variable pulse length: 12 to 768 clock ticks
– can be used to create a transmission with constant number of clock ticks
SENT slow channel
Short Serial Messages
For transmission of a slow channel message, 2 bits are included in a fast channel mes-
sage, see the status nibble (Bit 2,3) in Figure 13-62.
A short serial message needs 16 fast channel messages until it is completely transmit-
ted. Prerequisite for the complete transmission of the slow channel message are 16
consecutive error-free fast channel transmissions.
Figure 13-62: One serial message, composed of 16 SENT consecutive fast channel transmissions
Enhanced Serial Messages
The transmission of an enhanced serial message format requires 18 fast channel
transmissions. Each slow channel message is assigned a message ID, which is trans-
mitted with the data.
The enhanced serial message format provides two alternatives for configuring the
message:
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4 bit ID and 16 bit data
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8 bit ID and 12 bit data
SENT (option R&S
RTE-K10)