Winners of a DRSSTC UD2.1 board

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Seven users entered the lottery for a board by leaving a comment with a email address and through a gentleman agreement subscribed to the various channels related to this site.

Two random numbers have been drawn between 1 and 7 using random.org 

The two lucky winners are schiro marc and David! Thank you very much to all the other contestants for subscribing.

I will contact you regarding shipping details

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Win a DRSSTC UD2.1 board for just a like/subscribe

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I got two spare DRSSTC driver boards and you now have the chance to one of them home. It is a Steve Ward UD2.1 board as you see in the picture, with free shipping.

All you have to do is one or all of the following things:

  • Like my facebook page this is where you get the most frequent updates.
  • Subscribe to my youtube channel for instant updates on new videos.
  • Subscribe to my newsletter for the latest posts on this website, you can find the “Subscribe to Blog via Email” out in the right menu column.

Afterwards make a comment to this post about which service you subscribed to and use a valid email address, so that it is possible for me to contact you for shipping details if you are drawn as a winner.

There are 2 boards up for lottery, drawn as random numbers from the list of comments on this post. Winners will be announced on facebook and this website at Monday, August 22nd, 2016.

 

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Nokia Siemens Networks Flexi WCDMA teardown: Antenna (part 3 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 1: System station and Part 2: Power amplifier

This is an obsolete Kathrein XPol 2-port single band panel antenna. The 2 ports means that it actually has 2 antennas in the one unit. There is a main and a diversity antenna (90° polarized to each other) for 1710 – 2200 MHz (1800-2100 MHz mobile bands).

Newer antennas now have to allow for 700 LTE, 850 UMTS, 900 GSM and UMTS, 1800 LTE/GSM, 2100 UMTS and 2300 LTE so they have considerably more different antennas inside of them.

Each of the two antennas consists of a co-phased stacked array of dipoles. There is a total of 8 dipole pairs per antenna.

The antenna housing also includes a RET (Remote Electrical Tilt) which allows adjusting the direction of the electromagnetic lobe without climbing the tower or even moving the panel. By using a phase shifter located on the backside, the lower elements are phase delayed to electrically drop the front lobe down, without physically tilting the panel.

The phase shifters are actuated via the white glass fiber rod running up the side of the front of the antenna. The position of the arm inside the phase shifter is adjusted by turning the screw mechanism next to the connectors to move the rod.

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

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Nokia Siemens Networks Flexi WCDMA teardown: Power amplifier (part 2 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 1: System station and Part 3: Antenna

The following 12 minute video shows the teardown step by step with explanations, high resolution pictures of content is further down this post.

In the above pictures we see the tuning cavities of the band pass filter for the transmit and receive channels for the antenna connections. There is a total of three separate band pass filters. Each filter consists of a, from the left, receiving band pass filter, in the middle transmitting band pass filter and at the right another receiving band pass filter.

Most of the enclosure work also includes the small drums for tuning the cavities with the adjustable pins seen in the second picture, but in the transmitting cavities the silvered drums are, very unusually, made of a ferrous metal that is attracted with a magnet. Earlier I have only seen these as silver plated brass, but it does seem that even cheaper metals with enough silver plating can do the same job.

The tuning pins are however of a extraordinary good quality, very smooth surface with gold plating.

In the above pictures we see the three-sector RF amplifier boards, there is a total of three of these boards. The board itself is a Aluminium Silicon Carbide heat sink on which all the components are directly mounted. The input connectors in the bottom of the pictures leads the signals through a coupler to the Freescale / NXP MD7IC2250GN integrated RF LDMOS which is a 2-2.2GHz 5 Watt amplifier. From here the signal is routed via a Aeroflex P131103 output filter to the Anaren X3C21P1-05S Xinger III coupler where it distributes to the three output amplifiers through a additional coupler. The last stage of amplification is handled by three Ampleon / NXP BLF8G22LS-160BV Power LDMOS transistors which are 2-2.2GHz 160 Watt transistors, but in this setup used for a combined 60 Watt output of the module. The output filter is a Aeroflex 5608098 ISO-2100-33CW with a built in PT-100W 50Ω attenuation.

In the above pictures we can see that there is a massive amount of ceramic capacitor filtering on the input DC voltage that could range from 40.5 to 57 VDC.  The input is protected by varistor’s, chokes and diodes.

The digital signal processing board has its own power supply seen down in the right corner and each power amplifier module also has its own power supply which consists of a controller, transistors, planar transformer, output capacitors and choke to regulate the voltage very tight for the amplifier. There is also a massive amount of ceramic capacitors for filtering the voltage right up to where is connects to the modules.

In the above pictures we see the digital signal processing board with the three optical inputs in the bottom of the picture. Digital data is processed by the Freescale / NXP MCP8378 PowerQUICC II CPU and its associated Altera Cyclone IV FPGA (it should have been IV, not II on the picture).

Translation and splitting of the telecommunications protocol data and selection of different drive modes, if the amplifier is used for GSM, EDGE, HSPA, WCDMA or LTE, is done by the Nokia Siemens Networks marked ICs. The NSN 4371734 MURKKU2 and P155718 MERA CPUs are impossible to locate any data on, they do however have great resemblance to the NEC marked CPUs I have seen in GSM/EDGE amplifiers.

The Skyworks SKY65338-21 IC is a GSM 450-470 MHz transmit / receive front end.

The AD9122 TxDAC is a 16-Bit digital analogue converter that translates the telecommunications protocol into a analogue data stream with as much as 1230 MSPS. The analogue signal is amplified by the Skyworks SKY65387-11 IC that is a WCDMA variable gain amplifier.

A part of the receiving signal processing and filtering are the TriQuint 856731 192 MHz SAW filters that form a network to feed into the AZ4246 (ADS4246) which is a dual 14-Bit ADC analogue digital converter that translates the analogue data stream back into the telecommunications protocol with a speed of 160 MSPS. This section is most likely related to the GSM part of the receiving amplifier.

 

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

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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

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Ericsson RBS 2216 900 MHz base station teardown

The Ericsson RBS 2216 is a 900 MHz GSM base station that would have been installed at the base of a antenna somewhere out in the field of mobile telecommunication networks.

The enclosure contains one BFU-31 battery fuse and relay unit, three PSU-AC 27.2 VDC 1520 Watt power supplies, one DXU-31 central processing unit and 6 DRU9E-01 power amplifier and bandpass filters.

I will go through the different units starting with the battery fuse unit, then the CPU, then the power supply and at last, which also have a long teardown video, the power amplifier.

Battery fuse unit BFU-31

The battery fuse unit has two large connectors for the battery and some other external unit that I am not sure what is. The reason for knowing there is another external unit is that the connector marked “RBS” is in series with the “Batt” connector and the relays inside only handle one wire potential.

The long green connector has external alarm options from malfunction in the fuse unit. There is 8 pairs of NO/NC relays to be used. A small microcontroller on the board has feedback from various position switches on the large relays/fuses, voltage feedback and current feedback from a current transformer.

The unit contains a 80 VDC 270 A circuit breaker, a 260 A relay CZJ-260S/30.60A and 80 A relay CZJ-80S/30.60A. A Honeywell CSNS300M-001 current transformer that can measure up to 600 A DC or 825 A AC.

Central processing unit DXU-31

I think that the actual computer CPU is the PowerGarp RGP 101 1192/1 R3A since it has 512 MB SDRAM associated with it. I have not been able to find any further information on this IC.

Communication and network is handled by the Infineon QuadFALC PEF22554 HT IC.

I guess that the telecommunication protocol handler is the Ericsson VP22295-2 CPU which is connected to the Y-link ports and a 32 MB CF card.

The CF card contains 91 files and 2 sub folders with a total of 22.6 MB of data. All the files are without file extensions and on a FAT formatted file system. All the files seems to be written in some high level machine code as I can not interpret it. About half of the files does however also contain plain text which is mostly status and error messages. Following is the content of a file called “COLD_29K” which seems to be a cold start routine with error messages.

# – Coldstart
# – Processor revision < B4. Halting.
# – Restart counter limit exceeded.
# – Page mode not enabled.
# – Halting, no base appl found.
# – Starting DXU base appl.
# – Starting TRU base appl.
# – Starting ECU base appl.
# – Uncompress start.
# – PLS appl start.
# – Initiating all RAM.
# – Coldstart parity trap occured.
# – chc: 0x cha: 0xpc1: 0x cps: 0x# – Gr95 content: 0x

There are several other references in file names and within files to “29K” which seems to be the call name of their microcontroller.

Power supply unit PSU AC

There is not much to tell about the power supply unit. It is a solid piece of hardware that can deliver 1520 Watt power at 27.2 VDC. There is some trimpots in the middle of the PSU when you have the plate and heat sink removed, the one sitting closest to the middle of the group of three is able to adjust the output voltage, so it is possible to set it up to just about 28.2 VDC for use in HAM radio applications.

Power amplifier and band pass filter DRU9E-01

I made a video that describes the teardown of the amplifier and bandpass filter in much greater detail.

Different parts of the board shown in close up.

The Ericsson Tarac X CPU with the markings ROP 1011503/R1A F751500GPA 980 75P0P88 C has a total of 256 MB SDRAM.

The PowerGarp CPU with the markings RGP 101 1192/1 R3A has a total of 512 MB SDRAM

The couplers are Anaren Xinger II XC0900

The HDSL front end is a Analog devices AD7346A that converts the High-bit-rate digital subscriber line (HDSL)telecommunications protocol into a analog signal.

The transmiting transistors are 2x PTF080901E LDMOS RF Power Field Effect Transistor 90 W, 869–960 MHz.

The 20db attennuator is a RFP1398 rated for 100 Watt.

The receiving amplifiers have eight Analog devices AD7724 Dual CMOS Sigma-Delta modulators to convert the analog signal into a high speed 1-bit data stream.

 

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GSM 900 MHz power amplifier teardown

I had the opportunity to take apart a GSM 900 MHZ power amplifier and band pass filter. Here I will show you how it is built and explain a little about the various mechanisms inside the filter.

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Photomultiplier scintillation experiment

I have successfully detected something, this might sound a little uncertain, but there definitely is detected some kind of radiation or particle energy that causes varyous levels of light generated in the BC408 scintillation plastic that is attached to the front of the photomultiplier tube.

I have updated the article about the photomultiplier tube with all the details and measurements from this short proof of concept test.

Just the fact that a PMT assembly straight out of a industrial application can be reused for physic experiments after it has been fitted with a scintillation crystal or plastic is a huge leap towards cheaper amateur science in the fields of neutron detection, muon detection and cosmic ray detection.

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New Youtube channel and Google+ page!

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Kaizer Power Electronics now has its own separate Youtube channel and Google+ page, so that you can follow, subscribe and comment on just those topics related to Tesla coils, high voltage and electronics that you so desire 🙂

Please subscribe to the new Youtube channel at: Kaizer Power Electronics on Youtube

Please follow on the new Google+ page at: Kaizer Power Electronics on Google+

And remember there is still the same Facebook page, nothing new here, but like it if you want frequent updates: Kaizer Power Electronics on Facebook

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Kaizer DRSSTC III update #5 – First full power light!

The first full power light sparks have been flown and the results was more than satisfying!

See the videos and pictures in the full article!

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