Sifos Technologies PowerSync PSA100, Technical Reference Manual, Page: 106 / 147

PowerSync Analyzer Reference Manual
March 9, 2010 Sifos Technologies page 106
mp_discx_idp
Input Description
Disconnect Shutdown Current Disconnect shut-down load current threshold to use – equivalent to
I
min1
in
the IEEE 802.3af specification.
I
min1
must be 0mA for AC MPS PSE’s and
may vary from 0 to 5 mA for DC MPS PSE’s.
Output Description
Coupled Port Count Count of port combinations where power removal on one port causes power
removal on other ports.
Coupled Port List List of all disconnect shutdown coupled PSE ports.
Inactive Port List List of PSE ports that never power up at start of test.
Test Application
•
Assess independence and autonomy of all PSE ports in removing
power given PD disconnect.
•
Verify system (firmware) handling of port shut-downs and any system
logging functions associated with recording power events.
6.10. PSE Multi-Port Tests – PSE Port Overload Shut-Down Tests
The PSE Multi-Port Test Suite provides three tests that characterize PSE behaviors associated with PSE port overloads
and their associated power removal operations.
mp_overld_time
is the overload shut-down analogue to
mp_discx_time
,
mp_overld_cycle
is the overload shut-down analogue to
mp_discx_cycle
, and
mp_overld_idp
is the
overload shut-down analogue to
mp_discx_idp
described above.
mp_overld_time
and
mp_overld_cycle
both involve
bulk PSE port overloads with full user control of overload magnitudes and PD emulation characteristics.
mp_overld_time
Note: This test is not available with the PSA-PL.
Input Description
Overload Shutdown Current Overload shut-down load current threshold to use – equivalent to
I
cut
in the
IEEE 802.3af specification. Overload Shutdown Current will default to PD
Classification Specific values unless specified by user.
Output Description
Total Power Down Time Time required for all PSE ports to remove power given simultaneous PD
disconnects.
Average Power Down Time Average time per port for power removal following port overload.
Shortest Power Down Time Shortest time measured for power removal following port overload.
Powered Port List List of any PSE ports that never powered down.
Last Port Down PSE port that was the slowest to power down.
First Port Down PSE port that was the fastest to power down.
Inactive Port List List of PSE ports that never power up at start of test.
Test Application
•
Evaluate bulk PSE overload shutdown timing and PD classification
based power management behaviors.
•
Evaluate timeliness of system port management functions that may
intervene in PSE port shutdown behaviors.
•
Evaluate compliance to IEEE 802.3af
T
ovld
and
T
lim
parameters.
•
Assess PSE port power reserves (power management function) to
tolerate 50 msec overloads on multiple PSE ports.