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Flex6600 SteppIR Amplifier tune interlock
I operate my 6600 remotely using an orginal SteppIR MonstIR antenna and an Alpha 9500 Amplifier. The Amplifier PTT is keyed from the TX1 output on the rear of the Flex6600.
However it allows the Amplifier to key up whilst the SteppIR is tuning which is not good. I cant see when the SteppIR is tuning when I operate remote and am looking for a foolproof method to lock out the TX when the SteppIR is tuning.
My SteppIR Controller is a SDA100 has the tuning relay option. I have made up a cable from the SDA100 with an RCA on the other end. When the SteppIR is tuning the cable is open. When it had finished the cable is shorted.
My question is can I simply plug the tuning cable from the SDA100 into the TX Request input in the rear of the flex? Or do I need to setup SmartSDR also.
The manual (Page 25) says 7.8 TX REQUEST INPUT (INTERLOCK) This RCA connector is provided to receive an interlock signal from external amplifiers, or other external equipment. When enabled it will prevent the FLEX-6400/FLEX-6600 from going to transmit. The TX Request Input can be enabled with a 3.3V to 5V logic signal (when in Active High mode) or connecting to ground (when in Active Low mode). The circuit is a 74LVC14 CMOS Schmidt trigger logic input with a 2.7k pullup to +3.3V. The IC is 5V tolerant, so you can drive it with TTL levels as well. It can also be driven with an open collector transistor or open drain MOSFET. Grounding the center pin of this connector will prevent transmit from engaging (when in Active Low). Refer to the SmartSDR documentation for information about how the interlock system works and how to determine what is preventing transmit. The SmartSDR for Windows Software User’s Guide also includes details on how to interlock two radios from simultaneous transmit for a Multi/2 operation Refer to the SmartSDR documentation for information about how the interlock system works and how to determine what is preventing transmit. The SmartSDR for Windows Software User’s Guide also includes details on how to interlock two radios from simultaneous transmit for a Multi/2 operation
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