Tip and Ring Bi-directional signalling is not differential or in-ground current noise issue: Install a 0.1 Micro farad capacitor in series to the Tip. Then line test: If the signal/noise... read more →
AM carrier is coupling on the ground lines ( Tip and Ground) and then demodulated via the telephone bridge . The following should occur: Verify that board has the current... read more →
TXTOUCH screen is not receiving enough power caused by the following: The voltage, at the TXTOUCH input is below voltage. Increase the voltage by adjusting the adjustable power supply to... read more →
A solid ground point is a 6 AWG stranded ground wire feeding a room and coming from the building’s bond point ( Building bond- a point where all building corners... read more →
There is a short between the A+ and the B- connection to the RS485; Check the lines; Camera supply ( on board) is deregulating the 5V DC DC Converter. Remove... read more →
The radio is signal is coupling through the Tip and ground point. Connect and isolation transformer to separate the telecommunication unit’s ground point from the building’s ground point ( the... read more →