# WP7702 UMTS Uplink Scrambling code

**URL:** <https://forum.sierrawireless.com/t/wp7702-umts-uplink-scrambling-code/33727>\
**Category:** Octave\
**Tags:** faq\
**Created:** [September 30, 2024, 5:46am UTC](https://forum.sierrawireless.com/t/wp7702-umts-uplink-scrambling-code/33727 "2024-09-30T05:46:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![myadamlevin](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@myadamlevin](https://forum.sierrawireless.com/u/myadamlevin)\
**Post date:** [September 30, 2024, 5:46am UTC](https://forum.sierrawireless.com/t/wp7702-umts-uplink-scrambling-code/33727/1 "2024-09-30T05:46:40Z")

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Hello,

I am using WP7702 with a mangoh yellow to run some tests and in specific want to check connection and transmission from the device.  
I am using AT commands (Above the COM port over the USB connected to my PC) and want to trigger a UMTS transmission. First, I enter debug mode and configure the band, channel, power etc… for the transmission and start transmission with `TXON` command. I can see the device transmitting using a spectrum analyzer in the frequency I configured.

It is important to note that in this mode the device has no sim card and hence is not connected to a network.

From what I managed to understand from the documentation, the UL scrambling code in the transmission is not configurable.  
Can you tell me what is the scrambling code or how can I find it?

Thank you in advance,  
Adam

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [September 30, 2024, 6:14am UTC](https://forum.sierrawireless.com/t/wp7702-umts-uplink-scrambling-code/33727/2 "2024-09-30T06:14:26Z")

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this module does not support UMTS:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/0/0ee7c582eaa0f17186404aaf62b133feffc8c715.png)

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<div class="post-metadata">

**Author:** ![myadamlevin](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@myadamlevin](https://forum.sierrawireless.com/u/myadamlevin)\
**Post date:** [October 1, 2024, 5:52am UTC](https://forum.sierrawireless.com/t/wp7702-umts-uplink-scrambling-code/33727/3 "2024-10-01T05:52:40Z")

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Thank you for the answer.  
Maybe I failed to explain my intentions or I am missing something, but I just want to create transmission to I only need to configure the WCDMA layer without a full UMTS support, which seems to be supported by the module according to the documentation.

Am I missing something or is there a way figuring the scrambling code in the WCDMA transmission?

Thanks again

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [October 1, 2024, 1:09pm UTC](https://forum.sierrawireless.com/t/wp7702-umts-uplink-scrambling-code/33727/4 "2024-10-01T13:09:18Z")

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Where did you see the module supports wcdma?

> **[WP7702 LPWA Module](https://www.sierrawireless.com/iot-modules/smart-modules/wp7702/)**
>
> The WP7702 module for Cat-M1/NB1 worldwide networks with 2G fallback is fully compliant with the 3GPP Release 13 standard, providing a new low-cost, low-power technology for low-bandwidth IoT applications.