Specifications

International Radio and Electronics Corporation

25166 Leer Drive Elkhart, Indiana 46514 • 574–262–8900 • www.irec1.com

[% of Power Set] Displays the % of RF power setting.

[SWR] Direct reading of the antenna standing-wave ratio (the ratio of the desired load

impedance, 50 ohms, to actual load).

[ALC] DC gain control bias used to regulate PA supply voltage. With the PA power

supply at full output voltage, ALC will display about 6.0 volts. When the RF output is

being regulated by the RF power control circuit, this voltage will be reduced, typically

reading 4.0 to 5.5 volts. The ALC voltage will be reduced during PA DC overcurrent,

SWR, or TEMP fault conditions.

[PA Temp] PA heatsink temperature. The transmitter signals a fault when the heatsink

temperature reaches 50° C (122° F) for the FMX30 and 70° C (158° F) for the FMX100

and FMX250.

[PA DC V] Supply voltage of the RF power amplifier.

[PA DC I] Transistor drain current for the RF power amplifier.

[PS DC V] Unregulated DC voltage at the input of the voltage regulators. For battery

operation, this reading is the battery voltage minus a diode drop.

[Voltmeter] Displays the voltage at a test point located on the front edge of the

motherboard.

[Back] Returns to the previous menu.

[Secondary]

[ABC SWR Ref] The analog backup circuit setting which protects the transmitter from

high SWR if the digital processor fails.

[ABC Cur limit] The analog backup circuit setting which protects the transmitter PA

from high current if the digital processor fails. This is the main RF power output

adjustment when the unit first turns on before the digital processor takes control.

[ABC Temp Limit] The analog backup circuit setting which protects the transmitter PA

from high temperature if the digital processor fails.

[Tx Freq] The transmitting frequency setting.

[Model#] The model number of the transmitter.

[Serial#] The serial number of the transmitter.

[UIC Version] Version of the software for the user interface control.