No. No. No.
The 48 volt supply is probably floating. Meaning neither + or - is tied to
chassis ground.
You must check this first. If it has its negative terminal electrically
connected to the chassis it will make it very difficult to power a -48
radio. If it has its + terminal tied to ground they you are golden.
The -48 radio wants either a float supply or one that has its + terminal
tied to ground.
But since it specifies -48 that means internally the chassis is tied to +.
-----Original Message-----
From: Nate Burke
Sent: Tuesday, March 5, 2019 12:43 PM
To: AnimalFarm Microwave Users Group
Subject: [AFMUG] Cambium 820 DC Power Sanity Check
I have a 48VDC Power supply with + and - Terminals
The 820 Radio has a DC Power port with + and - Terminals
The 820 radio is expecting -48V
To get -48V to the 820 Radio
The + of the power supply goes to the - of the radio
and the - of the power supply goes to the + of the radio?
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