Protocol analysis
R&S
®
RTE
783User Manual 1326.1032.02 ─ 20
"crc5usb(n-m)"
The crc 5-bit operator performs a check for a 5\-bit CRC function
using the polynomial as defined by the USB standard. n and m define
the index range for the CRC check.
For example, if the CRC shall check fields 1 to 4, the function shall be
written "crc5usb(1-5)".
If the range of the CRC check includes an array, all elements in the
array is included in the CRC check.
If the check fails, the CRC field is marked as "CRC error" in the result
details and displayed in the color red in the honeycomb display. The
frame that contains the field is marked in the same way, except if
another higher priority error is found within this frame.
"odd(n-m),
even(n-m)"
The "parity" operators perform checks on odd or even parity in the
given index range n to m.
Odd parity is fulfilled if the count of "1" bits in the range including the
parity bit is odd. Even parity is fulfilled if the count of "1" bits in the
range including the parity bit is even.
If the parity check fails, the parity field is marked as "CRC error" in the
result details and displayed in red color in the honeycomb display.
The frame that contains the field is marked in the same way, except if
another higher priority error is found within this frame.
"{Block}"
The block operator is represented by the "{" and "}" bracket signs.
Consecutive fields marked with "{Block}" and using the same name
are displayed in the honeycomb display as a consecutive packet of
name "Block" with the first field's color. This feature is a visual effect
in the honeycomb only.
Remote command:
BUS<m>:CMSB:FRAMe<n>:CELL<o>:CONDition on page 1745
Numeric Format
Selects from the following numeric data formats for the Condition value:
●
Decimal
●
Hexadecimal
●
Octal
●
Binary
The following rules apply:
●
If the condition value contains at least one "H", "h", "L", "l", "X", "x", and the remain-
ing characters only contain "1" and/or "0", the numeric format is automatically inter-
preted as binary, regardless of its definition.
●
The wild-card characters "x" and "X" are only supported in binary format.
Examples: If the numeric format is set to be "HEX", then:
– "=1HL111000" is valid (read as binary)
– "=0x10101" is valid (read as binary, the "x" is interpreted here as a wild card)
– "=1010" is valid (read as HEX, with a total of 16 bits)
– "=0x5A" is valid (read as HEX "5A", since "0x" is a valid HEX prefix; neverthe-
less, it is recommended to enter "5A" instead)
– "=5X12" is invalid
– "=1H33" is invalid
Custom: Manchester / NRZ (option R&S
RTE-K50)M
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