PowerSync Service Analyzer Reference Manual
February 8, 2010
Sifos Technologies page
24
3.1.2. Parametric
(Interoperability)
Tests
Parametric Tests
report a number of parameters of the PoE service
that are relevant to interoperability of all PD’s at the PoE service outlet.
Additionally, certain safety related behaviors of the PoE service are
analyzed. Information collected includes line voltages (DC and AC) at
power extremes, detection signature range verification, rejection
signature range verification, inrush and overload tolerance of the PoE
connection, disconnect timing, and overload timing response of the PoE
connection. In performing these tests, the PowerSync
®
Analyzer is
utilized to emulate a wide range of IEEE 802.3af compliant steady state
and transient Powered Device behaviors.
Parameter
Description
Range of Outcomes
DCV_(1W):
PoE Line Voltage to Low Power PD
to assure valid line voltage to low power PD (36 to 57 VDC)
0 – 60 VDC
PASS / FAIL
ACV_(1W):
PoE Line Noise to Low Power PD
to assure “clean” DC line voltage to low power PD (< 0.5
Vpp)
0 – 5 VAC
PASS / FAIL
DCV_(13W):
PoE Line Voltage to High Power PD
to assure valid line voltage to high power PD (36 to 57 VDC)
0 – 60 VDC
PASS / FAIL
ACV_(13W):
PoE Line Noise to High Power PD
to assure “clean” DC line voltage to high power PD (< 0.5
Vpp)
0 – 5 VAC
PASS / FAIL
MIN_DETECT:
Power Applied to Valid Low-End PD Signature
to assure all Valid PD’s are detected properly (24 Kohm)
PASS / FAIL
MAX_DETECT:
Power Applied to Valid High-End PD Signature
to assure all Valid PD’s are detected properly (26 Kohm)
PASS / FAIL
Non802_DET:
Power Applied to Capacitive Load, Invalid 802.3af PD
to note capability of PSE to power many “legacy” PD’s
NONE /
Non802-Detect
MIN_REJECT:
Rejection of Invalid Low-End PD Signature
to assure that non-PoE devices do not get powered (15
Kohm)
PASS / FAIL
MAX_REJECT:
Rejection of Invalid High-End PD Signature
to assure that non-PoE devices do not get powered (33
Kohm)
PASS / FAIL
CAP_REJECT:
Rejection of Highly Capacitive PD Signature
to assure that non-PoE devices do not get powered
PASS / FAIL
INRUSH_TOL:
Tolerance of Service to Worst Case Allowable Startup Load
to assure proper startup of all compliant PD’s (400 mA, 45
msec)
PASS / FAIL
OVERLD_TOL:
Tolerance of Service to Maximum Transient Overload
to assure power maintained to compliant PD’s (400 mA, 45
msec)
PASS / FAIL
PD_DISCX:
Power Removal Timing on PD Disconnect
to assure PoE service will not damage non-PD’s (300 – 400
msec)
0 to 1500 msec
PASS / FAIL
OVERLD_OFF:
Power Removal Timing on PD Overload Shutdown
to assure PoE Service will not damage cables and
connections (50 – 75 msec)
0 to 1500 msec
PASS / FAIL
Figure 3.2
:
ParametricTests