Sifos Technologies PowerSync PSA100, Technical Reference Manual, Page: 129 / 147

PowerSync Analyzer Reference Manual
March 9, 2010 Sifos Technologies page 129
Time Savings = (6 * 5.6 seconds) – 22.6 seconds = 11.0 seconds
A script that encompasses a number of relevant parameters to a manufacturing test was developed for a PSE to further
demonstrate the effects of test optimization discussed in Sections 8.1.1 – 8.1.3. This demonstration script,
psa_six_port.tcl
tests six ports at a time for the following parameters:
•
RgoodMax Validation at 27 K
Ω
detection load
•
RgoodMin Validation at 19 K
Ω
detection load
•
RrejectMin Rejection at 34 K
Ω
detection load
•
RrejectMax Rejection at 14 K
Ω
detection load
•
Vport_LowLoad Port voltage with 20mA PD load
•
Vport_HighLoad Port voltage with Icapacity PD load
•
Icapacity Maximum load current sustained on port
•
PportCap Port power capacity
•
Disconnect Disconnect shutdown process
•
Overloads Overload shutdown process at < 405 mA
The script completes in less than ~36 seconds, or an average of
6 seconds per port tested
, and produces the following
results:
192.168.221.109 1,1 1,2 2,1 2,2 3,1 3,2
Detect_Accept: PASS PASS PASS PASS PASS PASS
Detect_Reject: PASS PASS PASS PASS PASS PASS
Vport_Low_Load: 47.4 47.4 47.2 47.4 47.5 47.3
Vport_High_Load: 46.6 46.6 46.6 46.7 46.7 46.5
Load_Capacity: 350 345 350 345 350 350
Power_Capacity: 16.3 16.1 16.3 16.1 16.3 16.3
Disconnects: PASS PASS PASS PASS PASS PASS
Overloads: PASS PASS PASS PASS PASS PASS
Test_Time: 36.4 seconds
psa_six_port.tcl
is available in source code as part of the PSA 3.0 (and newer) releases in the
…/PSA1200/Contrib/
directory.
8.1.4. Multi-Chassis Testing in Parallel
One other technique that can be utilized to speed up testing with the PowerSync Analyzer is parallel execution of test
scripts on multiple chassis’. For example, with two PSA chassis’, the PSE Conformance Test sequencer may be
executed concurrently from a
single host computer controlling
two different PSA chassis. This
“brute force” method of reducing
test time may be applied to any
test script executing in
conjunction with any PSA
chassis.
Since PSA Software limits the
user to
two instances
of
PowerShell and
one instance
of
PowerSync Interactive, test
sequences may actually be
executed with up to three
PowerSync Analyzers in parallel
with no effective loss of test time
to any of the shells meaning
whatever is accomplished in one
shell across N ports of the PSE
can be effectively halved if two
PSA chassis’ are available.
Figure 8.7
Executing Scripts Concurrently From 2 PowerShell’s