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APPENDIX A: Test Standards
A.6 Enhanced Cable Standards—Test Limits
SCAN-LAN VI includes several enhanced Cable Test Standards. All
enhanced cable standards are designated as “Plus” cable standards (for
example, Cat 5 Plus BasicLink. ISO Class D Plus). “Plus” cable test
standards include Power Sum NEXT and Delay/Delay Skew tests along
with the standard suite of tests. “Plus” Cable Test standards test the cable
to a higher standard than the standards they are based on (for example,
CAT 5, Class D) and are intended for testing the new emerging enhanced
data cable (sometimes referred to as 350 cabling).
Power Sum NEXT test limits for “Plus” cable standards are identical to the
pair-to-pair test limit of the base cable standard. All other test limits are the
same.
A.7 IEEE Twisted Pair—Test Limits
IEEE 802.3 and 802.5 Standards specify cabling performance required
for proper operation of Ethernet and Token-Ring networks, respectively.
SCAN-LAN VI checks against the following limits when those wiring
systems are invoked from the menu. These systems can be tested with
either the plug or jack interface.
NOTE
When diagnosing wiring problems on existing Ethernet or Token-Ring
networks, it is appropriate to test to the IEEE standard for that particular
network despite the probability that wiring originally may have been
certified to some higher performance category.
The benefit of testing in this manner is that a good deal of time will be
saved when diagnosing cabling performance for the needed frequencies
rather than attempting to re-certify wiring for performance that is higher
than needed for the network to operate properly.
Table A-7. 10BASE-T Pass/Fail Limits
Length
≤
100 meters
Resistance
<9.9
Ω
Characteristic Impedance
100±25
Ω
NEXT
>31 dB @ 5 MHz
>27 dB @ 8 MHz
>26 dB @ 10 MHz
(NEXT >26-15log(f/10)
where: f = signal frequency in MHz)
Attenuation
<11.5 dB
Split Pair
NEXT <20 dB (8 to 10 MHz)
Summary of Contents for SCAN-LAN VI
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