Test Procedure
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Reconnect the Channel 3 scope probe to test point TP33. Set the scope to trigger on Channel 1.
Disconnect the current probe and reconnect it across the 12VIN1 supply lead. Move the probe ground
lead to test point TP9. Set the SLOT A PWR ENABLE switch to the LO position. The SLOT A PWR green
STATUS LED should illuminate. On the scope, verify a waveform capture was obtained similar to that
shown in
. The Channel 1, 3 and 4 waveform parameters should be similar to those indicated
above for
. Again, the extent of variance of the 12-V supply setting from a nominal 12.0 V affects
the ramp-up timing result. A DVM can be used to verify the voltage at TP7 (with respect to ground at TP9)
is essentially the same as the input supply potential at 12VIN1.
Figure 7. Output Ramp-up Waveforms – 12A Rail
The 12-V channel input OR'ing operation can be confirmed as follows: connect voltmeters across the 12-V
output test points (SLOT A at TP7, SLOT B at TP10) and a convenient ground point. Setting the SLOT A
PWR_OR switch to LO should cause the Slot A output voltage to drop by about 600 mV (i.e., a diode
drop). Setting the SLOT B PWR_OR switch to LO should cause the Slot B output to drop by about 600
mV.
When any of the output channels are disabled (ENABLE switch returned to HI position), the corresponding
output should decay towards 0 volts.
Module operation as indicated in the above steps is a good indication of a fully functional board and
correct set-up. This is also a good starting point for further test and user evaluation of the device.
TPS2358 Dual-Slot ATCA™ AdvancedMC™ Controller Evaluation Module
12
SLUU328 – August 2008