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FLEX-6000 Signature Series - SmartSDR for Windows Software User’s Guide

Page 152

3. Enable the respective TX1/2/3 outputs by clicking the Disabled button for the appropriate

TX1/2/3 output on each radio in the transmit tab (enable the output for the port you are using

in steps 1 and 2)

4. Enable the interlock on both radios by selecting Active Low in the Interlocks – TX REQ section for

the RCA cable

5. Test to ensure proper operation: ensure that radio #2 cannot transmit while #1 is transmitting

and vice versa. When testing, use the information below to ensure proper operation

When the interlock is active, meaning the radio will not transmit even though actions that would

normally cause the radio to transmit (PTT is pressed, the CW paddles are being keyed, CAT is

attempting to transmit, etc.), the radio will:

1. Change the color of the LED on the front panel of the radio from green (receive) to red (transmit).

2. All relays in the radio will engage to start transmission

3. PA finals in the radio will be biased for transmit

4. The waterfall will indicate that the radio is in transmit

5. If in CW, sidetone will be heard as if the radio is transmitting

6. But NO power will emanate from the radio meaning the power meter will show no power out,

the panadapter will show no power out and the TX indicator at the lower right of SmartSDR will

not change to a red TX

The indicator in the lower right corner of SmartSDR will always indicate the reason that the radio will

not transmit and why:

This shows that transmit is being inhibited by the RCA TXREQ line on the rear of the radio. Once the

TXREQ line is cleared, the indicator will revert to a normal transmit indicator:

The Max Power text box allows the user to manually set the radio’s maximum output power on ANT1

and ANT2, when using the PA. This control sets the maximum value of the RF Power slider on the RF

Power / ATU Control Panel (section 37.7.1). Transmit power set by third party programs will be

limited to this value.

FlexRadio Systems FLEX-6000 Signature Series User Manual

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