Power supply brownout w/ the Microhard Carrier USB Dongle
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I am trying to use a stand alone Microhard Carrier USB Dongle with a pmDDL2350 module. This module is one of the "newer" versions capable of 36dB (4w) RF power output. With the radio disabled, or at its lowest power setting (7dB), the carrier board and module operate normally. However at any higher power settings the module appears to brownout and reset itself. I've been able to replicate this problem with several different USB dongles. The problem does not appear when a lower power module like the pmDDL2450 is installed in the same carrier board. The same pmDDL2350 module installed in a microhard carrier board (ie an -ENC enclosure) operates normally.
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I am trying to use a stand alone Microhard Carrier USB Dongle with a pmDDL2350 module. This module is one of the "newer" versions capable of 36dB (4w) RF power output. With the radio disabled, or at its lowest power setting (7dB), the carrier board and module operate normally. However at any higher power settings the module appears to brownout and reset itself. I've been able to replicate this problem with several different USB dongles. The problem does not appear when a lower power module like the pmDDL2450 is installed in the same carrier board. The same pmDDL2350 module installed in a microhard carrier board (ie an -ENC enclosure) operates normally.
@Nick-Stroumtsos Our carrier board design is a few years old, there's a good chance it won't meet this newer spec. Do you know what the 4W mode draws in terms of power? What power supply are you using? Using a battery as a power source might help with brown outs
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@Nick-Stroumtsos Our carrier board design is a few years old, there's a good chance it won't meet this newer spec. Do you know what the 4W mode draws in terms of power? What power supply are you using? Using a battery as a power source might help with brown outs
Moderator said in Power supply brownout w/ the Microhard Carrier USB Dongle
@Nick-Stroumtsos Our carrier board design is a few years old, there's a good chance it won't meet this newer spec.That is correct, it is not going to be supported on this design.
We designed for the 30dBm max power modes from several years ago as shown here:
We have a power consumption table in our tech docs that helps a user determine the limits for various modes:
https://docs.modalai.com/microhard-add-on-datasheet/#power-consumption
but nothing above 30dBm. We'd need new hardware for that.
Sorry, but at least hopefully that explains the behaviors you are seeing.
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