RF FAQ

STX2/3e Pallet Replacement
Please see the pallet replacement procedure on the STX 2/3e
Thu, 30 Mar, 2023 at 2:31 PM
STXe 500 with red PA & PS LEDs or dead front panel, what is the cause?
A damage 919-4212 DC Regulator will lead to this red LEDs. The DC Regulator Board has an input +48Vdc voltage coming from the Mean Well Power Supply, check ...
Tue, 25 Apr, 2023 at 10:56 AM
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
Troubleshooting Network and Can Comms issues in the STX10/20
Start at the Tech Manual (597-4014) Section 3.2—Page 13 of the TM or Page 31 of the pdf.  If that doesn’t help, then use the below to further troubleshoot. ...
Thu, 30 Mar, 2023 at 2:18 PM
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...
Thu, 26 Aug, 2021 at 1:33 PM