Yaesu FTA-310 Operating Manual

FTA-310 OperATing MAnuAl 7controls & connectors (sIde panel) PTT (Push To Talk) SwitchPress this button to transmit when you are operatingin the COM band. Release this button to return tothe “Receive” mode. See page 16 for details. MONITOR SwitchThis button may be pressed to “open” the squelchmanually, allowing you to listen for very weaksignals. Press and hold this button for 2 secondsto “open” the squelch continuously. Press this but-ton again to resume normal (quiet) monitoring. Seepage 15 for details. EXT DC JackWhen an external 12-Volt DC power source is avail-able, you may connect the (optional) E-DC-5B Ex-ternal DC Cable here.1) Do not allow the FTA-310 to becomesubmerged in water while the rubber coveris removed.2) Do not connect any wire to this jack if that wireis connected directly to a 28-Volt DC source. Con-necting the FTA-310 directly to a source whichexceeds 15.0 Volts DC will result in damage to theunit, and this type of damage is not covered by theLimited warranty on this product. 