I have a Motorola SLR5700 UHF 50watt and attempting to utilize the auxiliary port in the back in order to interface an outboard controller. I don't understand why when I set a GPIO pin in the CPS 2.0 software the pin I select does not correspond to the pins on the aux. If I were to program via the CPS pin2 to be COS, pin4 on the auxiliary plug is what becomes COS not pin2. Another example if I tell CPS to make pin1 PTT it ends up being pin2 on the auxiliary plug becomes PTT. Additionally the repeater now does not transmit a PL tone.
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Motorola UHF SLR5700
- Thread starter N4ADI
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- Aug 14, 2024
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The GPIOs do not correspond to the connector pins.
- Joined
- Aug 14, 2024
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If using as a repeater, obviously do not check disable repeat path. That's for using it as a remote control base station. I believe carrier/pl detect needs to be enabled on GPIO 2/Pin 4. As far as no PL on TX, that must be a programming error.
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That explains it. That setting is for data streams only, or for an outboard controller that handles the squelch.
I find in most cases the original repeater audio path is superior to any audio passing through an external controller. If there are variable pre-emphasis adjustments in the repeater/controller most people don't have the equipment or knowledge on how to properly adjust it.
One common Motorola repeater in amateur service is the Quantar, which was Motorola's flagship repeater for a decade or more. I would never change its original repeat audio path and instead use controllers designed specifically for Quantar that does not change the original audio path or tone functions.
One common Motorola repeater in amateur service is the Quantar, which was Motorola's flagship repeater for a decade or more. I would never change its original repeat audio path and instead use controllers designed specifically for Quantar that does not change the original audio path or tone functions.
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