Wednesday, February 20, 2019

Moto 5G MOD comes at a cost measured in mW

Late last week, Motorola's Mobile 5G MOD (model number MD1005G, FCC ID IHDT56XL1) made its requisite appearance in the FCC OET database.  Part of the Moto Z series of modular attachments, the 5G MOD -- yes, repeatedly presented in all CAPS in the FCC OET filing, though we shall see if that sticks in the commercial branding -- is intended specifically as a 5G NR and LTE attachment for the VZW variant Moto Z3 (model variant XT1929-17, FCC ID IHDT56XJ1).  And the FCC OET authorization release likely is in advance of Mobile World Congress at the end of this month in Barcelona, when and where the 5G MOD may make its official debut before going on sale to the public.

While the retail price of the 5G MOD does not appear to have leaked yet, and maybe VZW will subsidize some of the cost, the device does not project to be inexpensive.  The parts list alone is significant, as the 5G MOD packs inside its own Snapdragon 855 chipset with X24 LTE modem, standalone X50 5G modem, multiple antenna arrays, and 2000 mAh battery.  Call the 5G MOD what it truly is -- a separate, cutting edge handset without a screen.

Of greater interest to this blog, however, is the potential effect on LTE RF performance that may come with the 5G MOD.  When the 5G MOD is attached, the Moto Z3 continues to rely upon its Snapdragon 835 with X16 LTE modem for any VoLTE or CDMA2000 voice duties.  But for cellular data, the X16 LTE modem goes idle, and LTE data handling gets passed over to the X24 LTE modem and RF signal path in the 5G MOD.  That means where 5G NR is not available, the Moto Z3 no longer dictates its own LTE RF performance.  Instead, the 5G MOD fallback LTE takes over.

Around Labor Day last year, I wrote a blog piece analyzing the Moto Z3 Play RF performance.  The focus was on the Moto Z3 Play, but the article also included the obvious comparison to the VZW exclusive Moto Z3.  In that spirit, let us extend another logical comparison -- Moto Z3 LTE both without and with the 5G MOD attached.

For level comparison purposes, I have reconfigured and reproduced first my last September graph of the Moto Z3 maximum uplink EIRP across its included LTE bands.  To this graph and others, standard boilerplate language applies.  All data has been gathered from publicly available authorization filings submitted to the FCC OET.  RF lab tests report maximum uplink transmission, not downlink reception.  Good baselines for maximum EIRP and antenna gain are 200 mW and 0 dBi, respectively.  And in the case of low band ERP figures, I have converted those manually to EIRP.


To add a few more facts and figures about Moto Z3 lab tested LTE performance, it hits conducted power targets of ~23.5 dBm and has antenna gain that ranges from 0 dBi for mid band to -1.8 dBi for low band.  That adds up to max uplink EIRP at ~200 mW for mid band, ~130 mW for low band.  On paper, that is average to good LTE RF performance.

To begin the comparison with the 5G MOD, start with LTE antenna gain.  Perhaps to accommodate the four 5G NR mmWave antenna arrays, the LTE antenna gain has suffered in the transition to the 5G MOD.  Note that on the Moto Z3, the maximum LTE antenna gain never falls below -2 dBi; on the 5G MOD, it never rises above -2 dBi.


That roughly 3-6 dB reduction in antenna gain is responsible for a substantial decline in EIRP across the board, maxing out at ~120 mW for mid band and ~40 mW for low band.  Conducted power figures are ~24 dBm, so on par with those of the Moto Z3 alone.  What that means is the 5G MOD is not making up for diminished antenna gain with inflated conducted power.  And that shows in the somewhat poor EIRP.


The takeaway is that the Moto Z3 with 5G MOD attached probably will experience some degradation in raw LTE performance and may struggle to maintain LTE connectivity in some challenging situations in which the Moto Z3 alone is fine.  Whether Motorola has engineered in a secondary fallback under those circumstances that idles the 5G MOD and shunts all LTE connectivity back to the Moto Z3 remains to be seen.

The Motorola Mobile 5G MOD has separate FCC OET authorization filings for its band 48 LTE and band n261 5G NR lab testing -- because those bands fall under different parts of the Title 47 CFR.  Maybe we will take a look at those high band and mmWave RF specs in a future article.

Source: FCC OET

34 comments:

  1. I enjoy your analyses and would like to suggest a review of one or more Samsung phones. Samsung is one of the few named vendors that use Cavendish Kinetics' MEMS antenna tuner, which is claimed to improve antenna impedance matching leading to improved EIRP. Samsung phones are overwhelmingly given Telstra's 'blue tick' for improved RF performance in outlying areas (for the frequency bands used in Australia). Are they indeed superior to other brands and if so is it categorical?

    ReplyDelete
  2. Great post. keep sharing such a worthy information.
    Web Designing Course In Chennai

    ReplyDelete
  3. The modulo operation (abbreviated “mod”, or “%” in many programming languages) is the remainder when dividing. For example can i pay someone to write my essay , “5 mod 3 = 2” which means 2 is the remainder when you divide 5 by 3. ... An odd number is “1 mod 2” (has remainder 1).

    ReplyDelete
  4. Information article, it was very Biography of! I simply began in this and I’m attractive more familiar with it better! Thanks, keep doing amazing..

    ReplyDelete
  5. Providing high-quality thesis proposal help always necessitates the creation of unique content. Each task necessitates the presentation of personal research and opinions. Tutors frequently emphasize the thesis' distinctiveness in writing all of its sections.

    ReplyDelete
  6. Wow! Thanks so much for Latest fakaza songs post. This information has been very helpful thanks for sharing this post.

    ReplyDelete
  7. แหล่งรวม เกม PG SLOT พวกเราอาจจะไม่ยอมรับกันมิได้ว่า เว้นแต่เงินรางวัลที่เย้ายวนใจในเว็บไซต์พนัน pg slot แล้ว ภาพ เสียง ในเกมส์เป็นเรื่องสำคัญที่เย้ายวนใจเหล่านัดหมายพนันให้ได้เล่น

    ReplyDelete
  8. I can't get out of shock after reading your article. Because I've never thought about it like you. I resent my narrow insight. Thanks to you, I got to know a new world. Thank you for sharing a good article. 토토사이트추천

    ReplyDelete
  9. It's an interesting post. I came to your blog by chance and it was really fun to see the various posts you wrote. You eventually made me subscribe to your blog. I want to tell you that I'm never an easy person. I can't wait for you to write a new article. I want to write my opinion based on your writing. 토토사이트추천

    ReplyDelete
  10. I think about it every time I read your article, but you have a really great insight. Among the people I know online and offline, your insight is at the highest level. That's why I love your blog. I hope you continue to post good comments. 안전토토사이트

    ReplyDelete
  11. Gem Saviour Conquest เกมสล็อต ฮีโร่ pgslot เกมสล็อต ฮีโร่ pgslot เมื่อท่าน สมัครเป็นสมาชิกกับ Gem Saviour Conquest เกมสล็อต ฮีโร่ pgslot รับไปเลย โบนัส 50% ระบบ ฝาก ถอน ของพวกเรา Auto เร็ว ใช้เวลาไปเกิน 1 นาที แล้วก็ยังสามารถทำรายการได้ ตลอด 24 ชั่วโมง ระบบออโต้ (AUTO)

    ReplyDelete
  12. Thanks for such a pleasant post. This post loaded with lots of useful information. Keep it up. If you are looking for the best information and suggestions related to FSTN LCD display then visit us.

    ReplyDelete
  13. superslot เคล็ดลับการชนะในการเล่นสล็อตออนไลน์ มีต่างๆ มากมายหลายรูปแบบขึ้นอยุ่กับเทคนิคและความถนัดของเซียนแต่ละคนในการเล่นเกมในแต่ละเกม เพราะ สล็อต แต่ละเกมมีกฎและกติกาในการเล่นไม่เหมือนกันทุกเกม ทดลองเล่นสล็อต กับฟีเจอร์นี้ที่ห้ามพลาด

    ReplyDelete
  14. superslot Online slots are the most advanced auto systems. ทดลองเล่นสล็อต Slots are simple and uninterrupted and uncomplicated. ทางเข้า superslot Make the play of every player It works well and doesn't cause any problems.

    ReplyDelete
  15. สล็อต xo Reveals how to play slots like a master ทางเข้า slotxo Reveals how to play slots like a master, check the payout rate สล็อต Play slots and earn money every day. It's good for making profits.

    ReplyDelete
  16. superslot ซุปเปอร์สล็อต สล็อต เกมไหน แตกบ่อย มากสุด ทดลองเล่นสล็อต ได้ทุกเกม จัดลำดับอันดับเกมที่มียอดนิยม ครบจบให้คุณเล่นในที่เดียว ทางเข้า superslot สล็อตออนไลน์ อัพเดทใหม่ล่าสุด เล่นได้ตลอดเวลา แจกเงินหนัก แจกบ่อย โบนัสใหญ่ เยอะ

    ReplyDelete
  17. superslot สล็อตออนไลน์ เป็นระบบ auto ที่ทันสมัยที่สุด ทดลองเล่นสล็อต สล็อต มีความง่ายและไม่สะดุดและไม่ซับซ้อน ทางเข้า superslot ทำให้การเล่นของผู้เล่นทุกท่าน ใช้งานได้ดีและไม่เกิดปัญหากวนใจ

    ReplyDelete
  18. slotxo เผยวิธี เล่นสล็อต แบบเซียน ทางเข้า slotxo เผยวิธี เล่นสล็อต แบบเซียน เช็คเรตการจ่ายรางวัล สล็อต เล่น slot ได้เงินทุกวัน เป็นผลดีในการทำกำไร

    ReplyDelete
  19. Thanks for sharing your thoughts. I look forward to your further postings.

    Cast India

    ReplyDelete
  20. Found your post interesting to read. I cant wait to see your post soon. Good Luck with the upcoming update. This article is really very interesting and effective.

    ReplyDelete
  21. Your blogs are great.Are you also searching for Nursing Writing Services? we are the best solution for you. We are best known for delivering nursing writing services to students without having to break the bank.whatsapp us:+1-(951)-468-9855

    ReplyDelete
  22. ทางเข้า pg slot ยุค 5G สำหรับนักเดิมพัน คงไม่มีใครไม่รู้จัก เกมสล็อตออนไลน์ กันแล้วเพราะปัจจุบันนี้นับว่าได้รับความนิยมสูงสุดจริงๆ ซึ่ง pg slot ณ เวลานี้ได้เปลี่ยนแปลงไปมากแล้ว ทดลองเล่นสล็อต</a มีรูปแบบให้เลือกเล่นมากมายหลากหลาย ต้องลองศึกษาให้ดี คุณก็จะสามารถเล่นมันได้ดี และ สนุกไปกับมันได้

    ReplyDelete
  23. UFC President Dana White Playing 먹튀검증커뮤니티 on Ultimate Casino

    ReplyDelete
  24. Your blog has always attracted me and this particular post left me speechless. It is one of the best pieces of writing I have seen. Good job…..
    lenovo k3 bluetooth speaker

    ReplyDelete