1-19
IM AQ1300-01EN
Features
3
2
1
4
5
6
7
8
9
10
11
12
13
14
15
16
App
Index
Payload Error Measurement
Using the (16-bit) payload CRC data in fields in Rx frame test tags, the AQ1300/AQ1301 can check for
payload errors between itself and the other device.
BER Measurement
By inserting a pseudo-random pattern (PN15) into the fill pattern data area of a Tx frame payload and
then sending the Tx frame to the other device, the AQ1300/AQ1301 can perform a BER measurement
to check for device errors.
Condition for Synchronization
A sync loss state changes to a synchronized state when a matching PN pattern of 32 bits or more is
detected in the payload.
Condition for Sync Loss
A synchronized state changes to a sync loss state when an error of 50 bits or more is detected
within 128 bits.
Note
The bytes that undergo BER measurement include the first 32 bits that result in synchronization.
Pause
When Flow Control is set to ON and the AQ1300/AQ1301 detects a pause frame, it will stop
transmission until the pause time passes.
Collision Detection
When the interface is RJ-45 10BASE-T or 100BASE-TX and half duplex is selected, the AQ1300/
AQ1301 detects collisions.
• Frames that are received when a collision is detected are considered invalid and are not used in
statistics.
• Late collisions (collisions that occur after a string of 512 bits that includes the preamble have been
sent) are treated as collisions.
1.7 Reception Features
