1-25
IM AQ1300-01EN
Features
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
App
Index
Rx Error Group
CRC Error
Indicates the number of frames in which FCS errors were detected.
The AQ1300/AQ1301 detects errors by comparing the CRC values calculated from the received
frames to the FCS (Frame Check Sequence) values in the received frames.
Undersize
Indicates the number of undersized frames.
An error occurs when a received frame is shorter than 64 bytes (excluding the preamble but
including the FCS).
• If the interface is XFP, frames shorter than 48 bytes will not be detected.
• If the interface is SFP or RJ-45, frames shorter than 18 bytes will not be detected.
Oversize
Indicates the number of oversized frames.
When a received frame is longer than the frame length that user defined (excluding the preamble
but including the FCS), a received frame is considered oversized.
When Manual has been selected in the Test menu, you can set the oversized frame length on the
Manual Setup screen. The factory default value is 1519 byte.
When Auto or Auto(Remote) has been selected in the Test menu and “Use Jumbo Frame” has not
been selected, frames that are longer than 1518 + the value set for “VLAN stacks” in the source
settings × 4 bytes are considered oversized.
Alignment Error
Indicates the number of alignment error frames.
An error occurs when a received frame's length is not in units of bytes and a FCS value is incorrect
(CRCerror).
An error will not occur if the FCS value is correct, even if a received frame's length is not in units of
bytes. Alignment errors are valid only for 10M and 100M connections.
Symbol Error
Indicates the number of received frames that contain symbol errors.
An error occurs when any of the following conditions is detected:
• If there are codes that cannot be encoded.
Errors are not detected if the interface is RJ-45 (10M connection).
• If the end value of a received frame is incorrect.
• If a link fault signaling (LFS) exists in a received frame.
(Interface type: XFP)
Latency Group
Max IFG (µs and bit)
Indicates the maximum interframe gap in terms of time and bits.
Min IFG (µs and bit)
Indicates the minimum interframe gap in terms of time and bits.
Avg IFG (µs and bit)
Indicates the average interframe gap in terms of time and bits.
Max Latency (µs)
Indicates the maximum difference between a frame’s timestamp and the time that it was received
Min Latency (µs)
Indicates the minimum difference between a frame’s timestamp and the time that it was received
1.8 Statistics
