Protocol analysis
R&S
®
RTO6
843User Manual 1801.6687.02 ─ 05
Each item in this list contains:
●
the SCPI name of the frame
(hence the name of the frame according to the related remote control com
mand (SCPI))
●
the GUI name of the frame, which is sometimes identical with the SCPI name
(the GUI names are highlighted in bold font and linked to one of T
able 13-36 /
Table 13-37 / Table 13-38)
●
a brief description of the frame type
List of frame types
●
ACK - ACK = Handshake packet indicating a positive acknowledgment.
●
BCNT - BCNT = BERT count, with BERT = Bit Error Rate Test. BCNT is a K28.3
sequence followed by the error count symbol EC. See also BERC.
●
BDAT - BDAT = BERT data, ordered set of a BERT command. This data sequence
(output of the scrambler) is used for BER testing and is equivalent to the logical
idle sequence, consisting of scrambled 0.
●
BERC - BERC = BERT error count, ordered set of a BERT command that does not
increment the error count register. BERC is not looped back to the receiver but
replaced with BCNT.
●
BRST - BRST = BERT reset, ordered set of a BERT command. Any time a BRST
is received, the error count register EC is set to 0 and the linear feedback shift reg-
ister (LFSR) for scrambling is set to 0FFFFh. Any number of consecutive BRST
ordered sets may be received.
●
BIAM - Bus Interval Adjustment = The bus interval is the period that establishes
the integral boundary of service intervals. It is equivalent to the Microframe interval
(THSFRAM) defined in the USB 2.0 specification.
●
CP0 - compliance data pattern. Runs in scrambled mode.
●
CP1/CP2 - compliance data pattern. Run in unscrambled mode.
●
CP3/CP5or6 - compliance data pattern. Run in both scrambled and unscrambled
mode.
●
DPH - DPH = Data Packet Header, containing a type field, the data packet’s
address, route string, length, and other information about the packet, including a 2-
byte checksum (CRC-16).
●
DPH n-def - = non-deferred Data Packet Header, containing a type field, the data
packet’s address, route string, length field replica, and other information about the
packet, including a 2-byte checksum (CRC-16). Valid only for USB 3.1 Gen 2.
●
DPP - Data Packet Payload = The packet’s payload data and a 32-bit CRC.
●
DPPA - Data Packet Payload Abort = Frame ordered set used to abort a data
packet payload.
●
ERDY - ERDY = The Endpoint Ready notification is a handshake packet indicating
a positive acknowledgment.
●
FWAKe - Function Wake = The function wake device notification is sent from a
device (that is enabled for remote wakeup) to the host, if it wants to exit from
"device suspend" or "function suspend".
USB 3.1 (option R&S R
T
O6-K570)
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