Nokia Siemens Networks Flexi WCDMA teardown: System station (part 1 of 3)

Nokia Siemens Networks Flexi Multiradio BTS is a GSM/EDGE, WCDMA/(I-)HSPA, and LTE base station for use in mobile telecommunication antenna networks. A network that you use daily on your cellphone.

Part 2: Power amplifier and Part 3: Antenna

In the above picture we  see the first DSP board that was visible when the first shield was taken off the enclosure. Please watch the following video to get a detailed description as I take it apart. Details on all the ICs, CPU and controllers follows in the pictures below the video.

In the above pictures there is a Freescale SC8548CVTANGB PowerQUICC III CPU which 2-16 GB Samsung memory. Other ICs include Texas Instruments ACH973, NXP LVC823A and Spansion GL512P12FFIV1.

In the above pictures there is Texas Instruments TMS320TC16488ZUN DSP processor, Lattice POWR1220AT8 programmable power supply controller and Marvell 88E6185-LKJ1 10-port Gigabit ethernet switch. There was a total of 14 Texas Instruments TMS320 DSP processors with each 28800 MIPS in processing power, combined that is over 400000 MIPS and corresponds to calculating power of 3x Intel Core i7 4770K CPUs.

In the above pictures there is a TDK Lambda iQE48025A050V-0A1-R switch mode power supply with planar transformers that uses gold traces in the PCB as windings.

In the above pictures there is a four ethernet ports out to the left which connects to the isolation transformers Pulse HX5004NL and HX1188NL. The network interface is managed by the Marvell Alaska 88E1145 Gigabit quad-port ethernet transceiver.

In the above pictures there is a Epson Toyocom OX-6500GG temperature controlled 30.72 MHz crystal oven that is stabilized by always keeping it at a constant temperature. Above it there is a Altera Cyclone II FPGA from the EP2C5 family and this model has 4608 LE’s, 119,808 RAM bits and 158 user I/O pins.

In the above pictures there is Texas Instruments TMS320TC16488ZUN DSP processor, Lattice POWR1220AT8 programmable power supply controller, Marvell 88E6185-LKJ1 10-port Gigabit ethernet switch, NEC 4374360MUKSU2 CPU which is unknown to me, a Spansion GL01GP13FFIV1, NXP LVC373A, Texas Instruments ACH973 and a Toyocom TCO-2111N2 153.6 MHz crystal.

Specifications

Frequency bands: 700, 800, 850, 900, 1800, 1900, 1700/2100, 2100, 2300 and 2600 MHz.

Maximum capacity: Up to 6+6+6 GSM or 4+4+4 WCDMA or 1+1+1 LTE at 20 MHz or flexible combination of the above technologies in concurrent mode.

Multi-radio configuration: 1 Flexi 3-sector RF module + 1 system module for GSM/EDGE + 1 system module for WCDMA/HSPA and LTE. Remote Radio Head (RRH) solution also supported.

RF power amplifier technology: Multicarrier power amplifier (multi-standard)

Height x width x depth: 133 x 447 x 560 mm per module, indoors and outdoors. Fits in any 19” rack.

Weight: 25 kg per module

Operating temperature range: -35 °C to +55 °C

Power supply: 40.5 – 57 VDC, 184 – 276 VAC with power module

Typical power consumption: 790W for combined GSM and WCDMA site

Output power: 240 W per RF module or 40 W + 40W per Remote Radio Head (RRH)

Ingress protection class: IP 65

About Mads Barnkob

Electrician, experimenter and amateur scientist with experience in industry automation, programming and all kinds of high voltage generating electronics.
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3 Responses to Nokia Siemens Networks Flexi WCDMA teardown: System station (part 1 of 3)

  1. Pingback: Nokia Siemens Networks Flexi WCDMA teardown: Antenna (part 3 of 3) | Kaizer Power Electronics

  2. Pingback: Nokia Siemens Networks Flexi WCDMA teardown: Power amplifier (part 2 of 3) | Kaizer Power Electronics

  3. Pingback: Nokia Siemens Networks Flexi WCDMA teardown: integrated Doherty amplifier (part 5) | Kaizer Power Electronics

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