RF FAQ

The tube socket in my FM T series transmitter is discolored or tarnished, how should I clean it?
It is not recommended to clean the socket. The discoloration does not affect its operation. If you are getting a bad connection between the finger stock and...
Tue, 8 Oct, 2019 at 11:09 AM
The XPi 10 has lost the FXi Exciter MAC address and the FXi Exciter is at a remote location...
The XPi 10 has lost the FXi Exciter MAC address and the FXi Exciter is at a remote location. I know the IP address of the FXi Exciter but I do not know the ...
Tue, 8 Oct, 2019 at 11:11 AM
There is a -20V and flashing LOCK indicator on my FX 50 Exciter, what could be the problem?
On the power supply/control board, measure TP4 for -20VDC.  IF TP4 is not -20VDC, then U6 LM337 Negative Voltage Regulator (part number 227-0337) on Power S...
Tue, 8 Oct, 2019 at 11:13 AM
What are the typical AM “A” and “E” series TX secondary Low Voltage Transformer AC readings?
Yellow to Yellow: 25.3VAC, Violet to Violet: 18.4VAC, Blue to Blue: 19.1VAC, Orange to Orange: 19.8VAC, Red to Red: 32.1VAC.
Tue, 8 Oct, 2019 at 10:07 AM
What are the typical AM “A” and “E” series TX secondary Low Voltage Transformer resistance readings?
Yellow to Yellow: 8.5 Ohms, Violet to Violet: 1.3 Ohm, Blue to Blue: 0.7 Ohm, Orange to Orange: 0.8 Ohm, Red to Red: 0.2 Ohm.
Tue, 8 Oct, 2019 at 10:10 AM
What causes the ASi 10, FSi 10, or XPi 10 to continually reboot?
This occurs when the software is not communicating properly with the hardware in the unit. The main causes are that one of the plug-in cards is not seated p...
Tue, 8 Oct, 2019 at 11:38 AM
What causes the PWM LED to illuminate on my AM transmitter (500 W - 10 KW)?
Turn off AC power to Transmitter and install the control board on an extender card; once completed, turn on the AC power to the transmitter. With a DC Voltm...
Tue, 8 Oct, 2019 at 10:14 AM
What channel does the ASi 10, FSi 10 and XPi 10 units use for PAD Data?
The channel depends on the software version loaded into the unit:        Software Version / Mode / Port 2.2.5 and below / Legacy HD Primary / 10,000 ...
Tue, 8 Oct, 2019 at 11:40 AM
What do I need to do in order to add the optional “Standby” Power Supply #3 in my “S” series TX?
Install the Power Supply making sure to remove the Tufex air-dam that would have been installed above the power supply #3 position and then install jumper P...
Tue, 8 Oct, 2019 at 11:42 AM
What happens if my AM transmitter loses the 120Hz drive signal from Power Supply #1?
The AM transmitter will be muted with no RF output. The AM 500A and 1A transmitters only have one power supply; most likely it will need to be repaired/repl...
Tue, 8 Oct, 2019 at 10:16 AM