# Usdx Cat control help
**URL:** https://forum.digirig.net/t/usdx-cat-control-help/4289
**Category:** Uncategorized
**Tags:** usdx2, usdx-plus-v2
**Created:** [August 27, 2024, 9:46pm UTC](https://forum.digirig.net/t/usdx-cat-control-help/4289 "2024-08-27T21:46:02Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@TA1KOE](https://forum.digirig.net/u/TA1KOE)
#### Post date: [August 27, 2024, 9:46pm UTC](https://forum.digirig.net/t/usdx-cat-control-help/4289/1 "2024-08-27T21:46:02Z")
Hello, I have a USDX device, I am trying to make a cat cable for FT8, but I could not do it.
1. I have a rs 232 usb ttl device
2. There is a 3.5mm jack I don’t quite understand how to connect these. I wonder if you can draw and explain from the photos I sent you. Do I need to use the front or rear outputs of the 3rd device?
---
### Author:  [@webmonkey](https://forum.digirig.net/u/webmonkey)
#### Post date: [August 27, 2024, 11:43pm UTC](https://forum.digirig.net/t/usdx-cat-control-help/4289/2 "2024-08-27T23:43:06Z")
yes, CAT control is the ‘back’ connection on the bottom marked CAT.
that female connection has 4 conductors, 1 is a PTT that can be used to trigger an amp or assert ptt itself.
so you need TIP, RING 1, and sleeve
skip RING 2
you may have to swap tip and ring 1 to make it work but sleeve is definitely GROUND
for my rig, i used TS-480 and 38400 bps, and CAT control was pretty solid.
(radio gets hot a little too quick for my uses so it doesn’t get used much)
good luck
kb0wlf
> **[SoloScout sponsored by Team Calvary Racing](https://www.youtube.com/@soloscout)**
>
> Hello all.
> SoloScout, aka WebMonkey here.
>
> I'm a retired 19D Cavalry Scout. Motorcycle ministry has been a big part of my retired life.
> (hence the wordplay on calvary and cavalry)
>
> Hopefully this channel will be a place to share my experiences in...
---
### Author:  [@Constrainted](https://forum.digirig.net/u/Constrainted)
#### Post date: [August 27, 2024, 11:47pm UTC](https://forum.digirig.net/t/usdx-cat-control-help/4289/3 "2024-08-27T23:47:18Z")
The connections for this radio are challenging, but some people have gotten it to work. There is a thread about this radio, called “white button uSDX” by their community.
> [@Cable for Chinese uSDX+ V2](https://forum.digirig.net/t/cable-for-chinese-usdx-v2/215):
>
> I’m trying to build a serial cable for a Chinese uSDX+V2. The radio uses a Kenwood mic/speaker connection and I’m able to transmit, receive, and key PTT using the Baofeng audio cable. The radio has a CAT port that emulates a Kenwood TS-480. Here is a diagram of the connector pinout: I have 2 questions. I purchased the Digirig revision 1.9 configured for CI-V. Is the " Duplex serial CAT with RS-232 levels" configuration the correct configuration for this radio? What is…
73 Constrainted
---
### Author:  [@Constrainted](https://forum.digirig.net/u/Constrainted)
#### Post date: [August 27, 2024, 11:57pm UTC](https://forum.digirig.net/t/usdx-cat-control-help/4289/4 "2024-08-27T23:57:45Z")
Here’s the [groups.io](http://groups.io) where some owners discuss this radio:
[Chinese-clone-radios@groups.io | Topics](https://groups.io/g/Chinese-clone-radios/topics)
73 Constrainted
---
### Author:  [@K0TX](https://forum.digirig.net/u/K0TX)
#### Post date: [August 28, 2024, 4:40am UTC](https://forum.digirig.net/t/usdx-cat-control-help/4289/5 "2024-08-28T04:40:53Z")
Also check out this post for successful integration using Digirig’s serial port as well as stand-alone USB dongle:
> [@Cable for Chinese uSDX+ V2](https://forum.digirig.net/t/cable-for-chinese-usdx-v2/215):
>
> I’m trying to build a serial cable for a Chinese uSDX+V2. The radio uses a Kenwood mic/speaker connection and I’m able to transmit, receive, and key PTT using the Baofeng audio cable. The radio has a CAT port that emulates a Kenwood TS-480. Here is a diagram of the connector pinout: I have 2 questions. I purchased the Digirig revision 1.9 configured for CI-V. Is the " Duplex serial CAT with RS-232 levels" configuration the correct configuration for this radio? What is…