Fluke DSX-600 - Page 111

Chapter 3: Certify Twisted Pair Cabling
About dB Rules
93
At frequencies where FEXT or PS FEXT is less than 70 dB, ACR-F or
PS ACR-F are not evaluated against a limit. See Tables 3 and 4 for
applicable limits.
Table 3. dB Rules for TIA Test Limits
Measurement
Cat 5e/6/6A
Permanent Link Cat 5e/6/6A Channel
Return Loss
1
3 dB 3 dB
ACR-F
67 dB
2
70 dB
3
1. If insertion loss is less than 3 dB, Return Loss measurements show an .
2. If FEXT or PS FEXT is less than 67 dB, ACR-F and PS ACR-F measurements show an .
3. If FEXT or PS FEXT is less than 70 dB, ACR-F or PS ACR-F measurements show an .
Table 4. dB Rules for ISO Test Limits
Measurement
Class D, E, E
A
Permanent Link
Class D, E, E
A
Channel
Return Loss
1
3 dB 3 dB
NEXT/PS NEXT
2
4 dB 4 dB
ACR-N/PS ACR-N
2
4 dB 4 dB
ACR-F
3
70 dB 70 dB
PS-ACR-F
70 dB
4
67 dB
5
1. If insertion loss is less than 3 dB, Return Loss measurements show an .
2. If insertion loss is less than 4 dB, these measurements show an .
3. If FEXT is less than 70 dB, ACR-F measurements show an .
4. If PS FEXT is less than 70 dB, PS ACR-F measurements show an .
5. If PS FEXT is less than 67 dB, PS ACR-F measurements show an .