Osmo-bts-lna » History » Version 1
mschramm, 06/20/2018 08:35 PM
init stub for Osmo-BTS-LNA
| 1 | 1 | mschramm | h1. misc hardware projects |
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| 2 | |||
| 3 | {{>toc}} |
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| 4 | |||
| 5 | h2. Osmo-BTS-LNA |
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| 7 | The Osmo-BTS-LNA is a low noise amplifier intended for DCS uplink reception (MS->BTS). This is DCS1800 for GSM and band 3 for both UMTS and LTE. |
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| 9 | The LNA features a 2-stage LNA formed by RF3865 (RFDM/Qorvo) and two EPCOS B3832 SAW. |
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| 11 | The board consumes about 200mA @5V. It intregrates a MIC5219-5 LDO and should be supplied with 5.5-12V DC (7V nom.), either |
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| 12 | * by local connection (DC input), or |
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| 13 | * by 'phantom power' via DC biasing from the RF output. |
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| 15 | The RF port can be used with U.FL/IPEX or SMA by moving a coupling capacitor. Bias sourcing is available via SMA. |
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| 17 | !{width: 40%}osmo-bts-lna_schema.jpg! |
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| 18 | !{width: 40%}bts-lna-top_mr.jpg! |
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| 19 | !{width: 40%}bts-lna-top-2_mr.jpg! |
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| 20 | !{width: 40%}bts-lna-top-app_mr.jpg! |
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| 21 | !{width: 40%}bts-lna-bott_mr.jpg! |
