Teledyne LeCroy USB Chief - Users Manual - Manual (Page 105)

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Chief User’s Manual CATC Version 1.7
crc 5 bits
or
16 bits Assign a value for the crc field. The default value is the correct crc calculated for
the packet and can be set by not specifying this field
eop positive
integer Assign a positive integer for the length of the end of packet (EOP). Possible values
are 2 to 4, resulting in 1 to 3 bits of SE0 and 1 bit of J. The default value is the
correct length (2 bits of SE0, 1 bit of J).
idle positive
integer
or
string Assign a positive integer or string to this key defining the length of idle after the
current packet. The positive integer indicates the number of full-speed or
low-speed bit times. The default value is ten.
When this keyword is assigned the string ‘TO_EOF’ the USB Chief automatically
calculates the amount of idle remaining in the frame. When handshaking with a
device you can use this keyword to add idle where you anticipate a packet being
returned from the device. To aid in anticipating a devices response, use the strings
‘BYTES_IN_n” and “LS_BYTES_IN_n” where n is the number of bytes expected
from the device.
marker “string” Assign a string in quotation marks to be put in the marker for the defined packet.
raw_data ( aa bb ) Assign data bytes for the packet after the PID. Use the following syntax:
raw_data=(12 34 56 78 90 AB CD EF DC 13 40 78 11 CA 70 65). You can wrap
bytes of the data field to the next line.
bit_stuff string Assign the string OFF or ON to control bit stuffing. The default value is ON.
sync integer
1-7 Assign an integer from 1 to 7 to represent the sync field. The integer is the number
of zeros transmitted before the one. The default value is 7 to give a sync of
‘00000001’.
Repeat Control Key
wrap string Defines the point in the traffic flow where the traffic generator returns when
running in repeat mode (wrap=here).
Key Code Format Description