https://e2echina.ti.com/support/rf-microwave/zh-CNTelligent Community 13https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1087300/afe7950-afe7950-ddcfactorrx-2-with-lmfshdrx-42220-in-2t2r-mode-for-1-2-ghz-rx-bw-shows-rx-ddc-jesd-async-fifo-status-0x50/3914022Mon, 03 Aug 2026 02:18:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:cff036f6-a788-45b6-9831-2ad1cf5a4385user5953526As an additional question related to the previous async FIFO discussion: In our 4T4R hopping configuration, both TX and RX multi-NCO hopping via NCOSEL pins work correctly. But in our 2T2R configuration: TX hopping still works RX hopping does not work Details: RX multi-NCO table load succeeds RX NCOSEL pin values change correctly Direct RX NCO update also works However, the actual RX LO does not follow the selected RX multi-NCO slot So it looks like only RX hopping via multi-NCO + NCOSEL pins fails in 2T2R. Is this related to the earlier RX async FIFO / DDC-JESD configuration issue? Or is there any extra bringup requirement for RX NCOSEL pin control in 2RX mode? Thanks.https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1087300/afe7950-afe7950-ddcfactorrx-2-with-lmfshdrx-42220-in-2t2r-mode-for-1-2-ghz-rx-bw-shows-rx-ddc-jesd-async-fifo-status-0x50/3913988Sun, 02 Aug 2026 22:48:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:340bed94-8640-4da1-9376-c94401319035Taylor您好， 已经收到了您的案例，调查需要些时间，感谢您的耐心等待。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1087300/afe7950-afe7950-ddcfactorrx-2-with-lmfshdrx-42220-in-2t2r-mode-for-1-2-ghz-rx-bw-shows-rx-ddc-jesd-async-fifo-status-0x50Fri, 31 Jul 2026 11:10:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:022692a3-eb7f-496f-b9ab-77019555cb35user5953526Part Number: AFE7950 Hi TI team, I am working on an AFE7950 custom board and would like to confirm whether my use case is officially supported, and how to correctly close the remaining RX async FIFO issue. Application goal I need to achieve ~1.2 GHz RX bandwidth on AFE7950, but I am limited by the FPGA GTH maximum lane rate (~16.3 Gbps). Because of this lane-rate limit, I cannot use a configuration that would require a higher JESD rate. My current target is: 2T2R-style sparse channel usage only RXA + RXC used RX bandwidth target = 1.2 GHz JESD204C / 64b66b LMFSHdRx = 42220 ddcFactorRx = 2 With this setup, Latte calculates RX lane rate around 12.16512 Gbps, which fits my FPGA GTH limit. If I use ddcFactorRx = 4, lane rate is only about 6.08256 Gbps, but RX bandwidth is no longer sufficient. Relevant configuration My key RX-side settings are approximately: sysParams.FadcRx = 2949.12 sysParams.rxEnable = [True, False, True, False] # RXA and RXC only sysParams.ddcFactorRx = [2, 2, 2, 2] sysParams.RRFMode = 5 # TDD non-shared sysParams.jesdSystemMode = [3, 3] sysParams.LMFSHdRx = ["42220"] * 4 sysParams.jesdTxProtocol = [2, 2] # ADC JESD TX = 64b66b sysParams.fbEnable = [False, False] TX side is not the main issue here. What I observe 4RX enabled configurations are much more likely to work Sparse 2T2R RX usage (RXA + RXC only) is where I see problems Latte/CAFE link bring-up can complete and the captured RX waveform can look normal However, checkAsyncFifoStatus() still reports: ret, raw = setupParams.CAFE.checkAsyncFifoStatus(0) # ret = 0 # raw = 0x0000000000000050 From the CAFE bit definition, 0x50 means: bit4 = RXA DDC-JESD Async FIFO bit6 = RXC DDC-JESD Async FIFO So the issue appears to be specifically the RXA / RXC DDC-to-JESD async FIFO. Additional observation The RX waveform can still appear correct, so this looks more like a startup margin / FIFO boundary issue rather than a complete JESD link failure. When I manually inspect FIFO pointers after bring-up, the result is not always cleanly centered. For example: RXC: (11.0, 11, 5, 12, 8.0) RXA: (3, 11, 3, 13, 10.0) This suggests the FIFO pointer relationship is marginal/unstable, especially on RXA. My questions Is ddcFactorRx = 2 with LMFSHdRx = 42220 in this TDD / sparse 2T2R-style RX usage officially supported on AFE7950 for ~1.2 GHz RX bandwidth? For RXA + RXC only usage, is there any TI-recommended setting for: RX data mux TDD mode / override async FIFO offset JESD mapper usage startup sequence If checkAsyncFifoStatus() returns 0x50 but the RX waveform looks normal, should this be treated as: only a startup-margin warning, or a real functional risk that can later affect repeatability / deterministic latency / temperature robustness? Is there any TI-validated example script for: AFE7950 ddcFactorRx = 2 LMFSHdRx = 42220 64b66b preferably 1.2 GHz-class RX bandwidth If sparse RX usage is not recommended in this mode, is TI’s recommended workaround to: enable all 4 RX chains internally, but only use RXA / RXC data in the system? Why I am asking My system bottleneck is the FPGA JESD lane rate, so I am trying to find the highest-confidence TI-supported way to achieve 1.2 GHz RX BW without exceeding ~16.3 Gbps lane rate. Any clarification on whether this is a supported mode, and what TI recommends for the RX async FIFO issue in this exact case, would be greatly appreciated. Thanks.AFE7950https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1086574/ads127l18evm-pdk-ads127l18-evm-irreducible-100-fs-floor-in-dual-channel-residual-phase-noise-measurement/3911753Tue, 28 Jul 2026 06:55:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4779ee13-2dd9-4775-899c-8eb4e797a385Daniel您好 https://www.ti.com/lit/an/slyt705/slyt705.pdf?ts=1785217982131 https://www.ti.com/lit/an/slyt237/slyt237.pdf?ts=1785218006488 https://www.ti.com/lit/an/slyt090/slyt090.pdf?ts=1785218013427 以上是相关文档资料请您参考。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1086574/ads127l18evm-pdk-ads127l18-evm-irreducible-100-fs-floor-in-dual-channel-residual-phase-noise-measurement/3910968Mon, 27 Jul 2026 00:00:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:7a28ed22-4e4b-4bb0-aec8-0028179f035aLydiaHello, we have received your case and the investigation will take some time. Thank you for your patience.https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1086574/ads127l18evm-pdk-ads127l18-evm-irreducible-100-fs-floor-in-dual-channel-residual-phase-noise-measurementSun, 26 Jul 2026 08:44:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:c967c717-4242-48b0-a789-fd4477e1eb66C.H. HsuehPart Number: ADS127L18EVM-PDK Other Parts Discussed in Thread: ADS127L18 Hi TI team, We are measuring the residual phase noise / relative timing drift between two channels of ADS127L18 EVM. Setup: a single tone (frequency) from a source is split into two, fed into two ADC channels independently. After digital IQ demodulation per channel, we compute the phase difference (φ_ch1 − φ_ch2) to reject common-mode noise (source phase noise, clock jitter). The differential phase is converted to delay (τ = φ/2πf) and analyzed via Allan deviation. Observations that confuse us: 1. Regardless of input frequency or amplitude, the relative delay Allan deviation always converges to a floor of ~100 fs. Higher frequencies converge to this floor faster, but the floor value is the same. 2. Injecting a pilot tone before the splitter does NOT improve the ~100 fs floor. The residual noise appears to be frequency-independent and not removable by common-mode correction. Since common-mode noise (source, clock) is already rejected by the differential measurement, and pilot tone fails to help, the floor must originate from something inside each ADC channel that is both channel-independent and pilot-insensitive. What could cause this ~100 fs irreducible floor? Is this a known behavior of ADS127L18 in dual-channel relative timing applications? We can share Allan deviation plots and raw data if needed. Thank you. Best regards, C.H. Hsueh测试和测量ADS127L18ADS127L18EVM-PDKhttps://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1085781/lmx8410l/3908198Wed, 22 Jul 2026 09:46:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:958605a5-1572-4858-b647-202d12d13686Vivian Gao数据手册第10部分有写layout要求，详见10.1.1 High Frequency Trace Routing和10.1.2 Power Trace Routing。 评估板展示的最佳实践，建议按照评估板去做。 主要目的： 抑制高频噪声耦合 隔离数字噪声对射频电路的影响 降低电源引脚的高频阻抗 TI没有公开gerber文件。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1085781/lmx8410l/3908179Wed, 22 Jul 2026 04:46:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:a8803952-fb01-4925-ab6e-698b18852aa9Vivian Gao感谢您对TI产品的关注。 我们正在核实您的问题，请等待我们的答复。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1085781/lmx8410lWed, 22 Jul 2026 04:34:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:0827404c-e06b-4ca4-9d46-b38e84bdedfeXu AllenPart Number: LMX8410L 你好， 在使用LMX8410RGZT是遇到两个问题，请帮忙解答一下 ，谢谢！ 1、官网没有LMX8410LEVM的gerber，请提供一下。 2、参考设计中有三根电源线走线特意绕长，这是出于什么考虑？是否可以不用这么做？测试和测量LMX8410LEVMLMX8410Lhttps://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1079714/afe7799-api-403/3887744Tue, 16 Jun 2026 23:35:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:a7bb50e0-cd99-4d93-9754-a7080a41f9cbEirwen您好， E2E技术论坛旨在解决客户在使用TI产品过程中遇到的技术问题。 建议您请按照以下方式联系客户支持部门，会有客服为您提供帮助。 www.ti.com/.../customer-support.htmlhttps://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1079714/afe7799-api-403/3887743Tue, 16 Jun 2026 23:31:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:19bca100-3463-4140-bb38-2c6d41a85378Eirwen已经收到了您的案例，调查需要些时间，感谢您的耐心等待。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1079714/afe7799-api-403Tue, 16 Jun 2026 09:49:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:11a7b86f-52df-4f30-afff-151c51b6dbd8huixin anPart Number: AFE7799 在TI store API 套件 中设置了库存订阅推送 API，但是在postman用POST请求的时候，返回403错误，截图如下所示，麻烦看一下，给出一个解决方案，谢谢了。数据通信模块AFE7799https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1073952/afe7903-can-afe7903-work-for-wifi-6e-5g-and-6g-frequency-band-which-ic-can-support-wifi-6e-frequency-band/3866600Fri, 15 May 2026 09:39:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4ce37e33-caf6-4f23-a16d-15a2a43b98e2Vivian Gao感谢您对TI产品的关注！由于 AFE7903 产品属于信息受限制产品，为更加有效地解决您的问题，请您将问题发布在E2E英文技术论坛上（英文论坛对应子论坛链接： https://e2e.ti.com/support/rf-microwave-group/rf-microwave/f/rf-microwave-forum ），将由资深的英文论坛工程师为您提供帮助。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1073952/afe7903-can-afe7903-work-for-wifi-6e-5g-and-6g-frequency-band-which-ic-can-support-wifi-6e-frequency-bandFri, 15 May 2026 08:59:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:cbffd638-6577-43e6-b9b1-2c41205d1001Xiaodong YuPart Number: AFE7903 Other Parts Discussed in Thread: AFE7900 , Dear Sir/Madam we want to make a product to work on Wifi 6E frequency band especially the 5G and 6GHz band. We checked AFE7900 adc/dac, we find the maxim ADC rate is 3Gsps. SinceWIFI 6E 5G and 6GHz band are very close we can not seperate them. So the total bandwidth of 5G+6G band is 2GHz, it seams 3Gsps ADC can not work on the 2GHz bandwith. is it correct? How can we solve the issue. any other TI's IC can work on Wifi 6E? Regards XDAFE7900AFE7903https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1071748/awr2188-safety-awr2188-document-download-access-denied/3858700Sun, 03 May 2026 23:54:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:7e652617-d4dd-4962-90d4-9cf98ea805f2AliceHello, Please try to request using a TI account that is bounded with a company email. If you have further concern, please contact customer support center to get support.https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1071747/awr2188-safety-awr2188/3858685Sun, 03 May 2026 22:48:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:cad7ed10-8daf-4123-9f82-f64fe5e352c3Taylor我们这里并没有审批权限，请联系客服部门进行咨询 客户支持中心 | TI.com.cnhttps://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1071747/awr2188-safety-awr2188/3858684Sun, 03 May 2026 22:47:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:c4d1babc-bc1a-464d-8c17-0e279b35a790Taylor您好， 已经收到了您的案例，调查需要些时间，感谢您的耐心等待。https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1071748/awr2188-safety-awr2188-document-download-access-deniedSun, 03 May 2026 14:37:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:1d4bb6e5-bb99-4f29-93e7-f034b3737a68zhaoyu xiongPart Number: AWR2188-SAFETY Other Parts Discussed in Thread: AWR2188 AWR2188 technical documentation access denied. Please approve my download request.AWR2188-SAFETYAWR2188https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1071747/awr2188-safety-awr2188Sun, 03 May 2026 14:30:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:102d2bc4-6746-4883-9f81-14d46b7e1743zhaoyu xiongPart Number: AWR2188-SAFETY Other Parts Discussed in Thread: AWR2188 hi, AWR2188 芯片开发软件相关资料下载被拒，请麻烦通过一下AWR2188-SAFETYAWR2188https://e2echina.ti.com/support/rf-microwave/f/rf-microwave-forum/1067907/afe7769d-gsm-cfr_dpd/3849583Mon, 20 Apr 2026 02:07:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:1488000f-cca2-42ea-b244-047248231175Links我认为这是一个我已为 Spiderradio 客户解答过的疑问。