Steppir PTT connection to 6600

Does the SteppIR controller have an output signal for TX Inhibit?

On the back of the Flex, the accessory connector has;  Pin 9
[Page 24 & 25 of the hardware manual]

7.8 TX REQUEST INPUT (INTERLOCK)  PIN 9

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.

Cheers,

Neal

I think so.   I have never looked at a SteppIR controller or antenna.
But the PIN-9 accessory connector WILL prevent the flex from transmitting
if the appropriate logic level is applied.    In the Flex SmartSDR SOFTWARE user manual,
on page 158, you will see there is a setting on the radio setup dialog box, TX TAB,
about halfway down the dialog box, for "Interlocks - TX REQ".

The Interlocks section offers three setting for RCA TX and Accessory TX: Disabled, Active High and Active Low. The FLEX-6300 does not have interlock settings for RCA. In the Disabled position, the connector or accessory pin will not perform any function. In the Active Low setting, transmit will be prevented if the connector/pin are driven to ground. In the Active High setting, transmit will be prevented if the connector/pin are “high” or driven to some voltage level above ~1.5V.


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Does your SteppIR controller put out it's own RF signal for tuning, or does it still
expect your transceiver to put out 5 watts for tuning?   Is it the transceiver you want
to disable during tuning, or is it your amp you want to disable?
The above interlock will not permit the flex 6600 to transmit ANY rf until the interlock
is removed.

Neal

Sergey, did you ever figure this out? 
Mark, W6MSB

I was reading the Power Genius manual this evening and it appears the amp can be configured to be keyed via the RCA connector instead of the LAN.  We should just be able to run the key line through the STeppIr controller like we do with other transceivers to prevent inadvertent keying of the amp when the antenna is tuning.

Keith - AC9S