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4 – 20mA Current Loop

Above Circuit http://tinyurl.com/y5kgx3af With ADC/DAC http://tinyurl.com/y3pbmyzl Analogue Input Digital Output via 4 bit ADC/DAC https://www.instrumentationtoolbox.com/2012/03/basics-of-4-20ma-current-loop.html...

Analyzing a Faulty Cisco IAD2431-16FXS

I have a Cisco IAD2431-16FXS that has an issue with audio from the FXS mouth ports, sending only static, receive is fine Testing with a 600ohm Alcatel TE200 with REN of 1 over a 1000m coil FXS Loopback Tests Lopping the local disables network and I get amplified...

NetCommWireless NDD-0300 Teardown

Main Board DSL Controller? D1_DSL W8396L01? D1_FAST Le87281 – G.Fast Single Channel Line Driver https://www.microsemi.com/product-directory/g-fast/4139-le87285 U11 UART? J2 Main Controller Catalyst semi? Microsemi? S8383N23SLMD8 Ethernet Transformer U7 –...