Digital Radio (GC Products) Forum - Recent Threads

Power meter in GC5016

Andres Espin — Wed, 22 May 2013 09:42:36 GMT

Hello, I want to know if is it possible to use the power meter in DUC mode? Thanks in advance

GC5016 DDC PFIR issue

Andres Espin — Thu, 16 May 2013 09:57:31 GMT

Hello

I'm using two GC5016, one in 4 channels DDC mode and the other in 4 channels DUC mode. The parameters of my design are:

CK: 40MHz

Ftune: 10MHz

cic_dec: 64

fir_dec: 2

fir_int: 2

cic_int: 64

Everything is ok except the following: I'm using the gc5016_filterdesign MATLAB script to design DDC and DUC FIR filter taps. First of all, I use a delta for the DDC filter and design the filter for the DUC, and everything works as expected. When I design the filter taps for the DDC and load them into the GC5016 I found that, without input signal, there are three tones at 10MHz, 10.104MHz and 9.896MHz. I'm reviewing all the documentation and posts on this forum, but I can't find neither explanation or idea wich explains what is happening.

Please can you help me to solve this? I'm completely stopped at this point

Thanks in advance

Andres

GC5325 Signal Issue

Xing Chen — Wed, 20 Mar 2013 22:04:04 GMT

Hello,

I am currently evaluating GC5325 with our power amplifier. I noticed there are few LTE waveforms inside the "baseband_data" folder.

My question is: if i need to create a customize LTE waveform, for instance LTE_4*5MHz signal with specify PAR. Is it possible to create a customize LTE waveform?

thanks in advance.

Loading Configuration files of GC5330 from teraterm instead of GUI

Gourab Maiti — Tue, 30 Apr 2013 11:34:06 GMT

Hi,

With GC5330 Eval Board GC5330_SAMPLE_HOST_1p3p0p0.rar file is given. Extracting which we are getting one GUI from where we can load 4 files

1. dpd-1p3p0p0RevD.bin

2. RF_Dig_evm_TxABCD_Ex_CLK_614p4.mat

3. 2antx2x20LTE_FDD.cfg.bbin_fpga

4. HPM_DIGEVM_TXABCD_WORD_3482_RXA_62p49_1xlte20.tgtcfg

through ethernet cable.

I want to load these files from teraterm and also after loading want to run these files so that proper configuration is done. How to do that from teraterm? Please let me know the commands also.

GC4016: question about CIC_SCALE

Ievgenii Volynets — Fri, 26 Apr 2013 09:48:49 GMT

Hello all,

I'm trying to understand calculations of the DDC's overall gain and I have a trouble now with a formula for CIC_SCALE (bottom of page 18 of manual http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=gc4016&fileType=pdf&track=no):

CIC_SCALE = 2^(SHIFT+SCALE+6xBIG_SCALE-62)

Corresponding to chart the CIC_SCALE is a block for shift input signal just before CIC-filter.
With the biggest values (SHIFT=7, SCALE=5, BIG_SCALE=7)

CIC_SCALE = 2^(7+5+6*7-62)= 2^(-8)

Is this means that from input signal (20 bits) only 12 bits is passed to the CIC?
I can't believe that we shift the signal so strongly even for the best case.
Why we have to calculate NCO and mixer with 20-bits precision if we shift it immediately to 12 bits?

Please, help me to understand this.

AFEDRI8201 HD Radio Reciver Chip

David Daugherty — Tue, 09 Apr 2013 17:27:53 GMT

I found this interesting chip on the the TI web site:

http://www.ti.com/product/afedri8201

But I notice that it appears to be no-longer-supported. For instance the software tools do not work with the modern Code Composers:

http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/p/40651/141563.aspx

Does anyone have any recent experiences developing with this chip? Can the development software be made to work either by getting older CC v 3.3 or by another means?

Are there better-supported TI solutions for processing L band signals with very high ADC sampling rates (~ 3.4 Msps)?

Thanks

Dave Daugherty

Higher Ground LLC

GC5016 synchronizing problem

Andres Espin — Mon, 25 Mar 2013 16:08:39 GMT

Hello all,

I'm using for GC5016 to implement several tuned filters wich a cutoff frequency of 25kHz. Two of them are configured in 4-channel DDC mode, with Interleaved IQ output, and the others are configured in 4-channel DUC mode with real output. One of the DUCs is connected to the other through the SUM in port.

Each DDC GC5016 is connected directly to one DUC GC5016, without any kind of FPGA or CPLD.

I'm experiencing problems synchronizing the DDC-DUC interface. I was trying to use the SOB output of one GC5016 to synchronize the others (in the same way as explained in the datasheet) but it doesn't work. I'm also trying using two external signal connected to the SIB of each GC5016 and adding a delay between them in the same way as explained in the TSW4100 user guide. It either doesn't work...

I'm thinking about redesign the board to add an FPGA between the DDC and DUC, but before that I would like to know if there's any other method to synchronize both ICs.

Can you help me in any way?

Thanks in advance

GC5325 EVM board

Faisal Mubarak — Tue, 05 Mar 2013 14:58:54 GMT

Hello,

I am actually interested in knowing if it is possible to generate a multi-tone signal, with QAM modulated signal (4QAM, 16QAM) on each tone, using this evm board. If yes, how could I get the base-band .mat file for this purpose?

The maximum number of tones is restricted by this hardware, but I would like to test with at least 10 tones, with equal spacing between the tones. The tone-spacing could be around 200 kHz up to 1 MHz.

The second question is, can we perform EVM measurements for a single carrier QAM (4QAM, 16QAM) signal using this board. I doubt that this is possible with this board, as the on board receive chain routs the signal back to the GC5325 chips, which use this information for DPD purposes. But I would like to see the constellation diagram being received.If it is possible, please advise. If I need additional hardware, which one do you propose?

regards

Faisal

GC5325SEK

Woo-Young Kim — Wed, 25 May 2011 08:28:52 GMT

Dear,

This Woo-Young Kim.

I am using the GC5325SEK.

1. I want to use Envelope Tracking test. How can I generate Envelope signals?

2. I want to use other signals. Is there available other signals?

Can you help me?

components for VHF tranciever

Adithya venkatesh — Mon, 04 Mar 2013 06:13:38 GMT

Is there any kind of VHF tranciever IC available in TI line which can be used in marine communication design ?

GC Studio for windows 7 64bit

Rohit Kurian — Mon, 21 Jan 2013 10:12:57 GMT

Hello,

Is there a separate 64 bit version for gc studio? I've bought a gc5016 eval board kit but the cd that came along with it is showing issues while installing it in my win 7 64x system.

Thanks,

Rohit

Support in GC5325SEK required

trilokchand dhal — Fri, 02 Dec 2011 05:57:07 GMT

I am using GC5325SEK for performance evaluation of DPD. But I am not able to load EVM.
I am using Signal TM1_600k_IF0_Fup61.44_0110_gc5325.mat

My Signal is loaded successfully. But DLL is still Unlocked.

It gives error "Timeout occured"

The LED of PLL Unlock is still Red., and Tx0_fail is ON.

the end of CMD screen is as follows:

cmd_str =

tftp -i 192.168.1.123 put control_off /tmp/control

Timeout occurred

Warning: command error.

> In write_cmd at 41

In gc5322>sDPD_TGTCFG_WR at 1264

In gc5322 at 70

In load_gc5322_gui at 50

In GC5325EVM>load_gc5322 at 2522

In GC5325EVM>load_EVM_Callback at 2857

In gui_mainfcn at 75

In GC5325EVM at 47

??? Error using ==> gc5322>sDPD_TGTCFG_WR

sDPD_TGTCFG_WR protocol error

Error in ==> gc5322 at 70

Error in ==> load_gc5322_gui at 50

Error in ==> GC5325EVM>load_gc5322 at 2522

Error in ==> GC5325EVM>load_EVM_Callback at 2857

Error in ==> gui_mainfcn at 75

Error in ==> GC5325EVM at 47

??? Error using ==> GC5325EVM('load_EVM_Callback',gcbo,[],guidata(gcbo))

Error using ==> gc5322>sDPD_TGTCFG_WR

sDPD_TGTCFG_WR protocol error

??? Error while evaluating uicontrol Callback

Please guide me as how to overcome this problem. .

Thanks a lot..

Trilok

GC5016 Input and Output Freq Range in Transceiver Mode

Tom Hurst — Fri, 11 Jan 2013 03:00:43 GMT

Hello,

I'm looking to cover from 5MHz to 500MHz at a min using subsampling.

I wanted to check on the 5016. I like the features but did not see any specs other than the clock freq. If the GC5016 is not suitable could you make a recommendation please. I do not need a large device.

The protocols will be digital using I/Q channels. Also any recommendations on converters would be great. I have a few I'm looking at but open to ideas.

I was considering using a UWB THA to level off the input but the cost may be a problem with that.

Thank you for your time.

Tom Hurst

GC Studio Download

tanase cristian — Wed, 05 Dec 2012 20:45:16 GMT

Hello all,

Is there any chance to download CG Studio ?

I have recently ordered some GC 5016 chips and i need this program. I was not able to find'it on TI web-site.

Regards,

Cristian

Question for GC5018 set up.

Satoshi — Wed, 09 Jan 2013 00:37:44 GMT

Isn't there any application note more detailed than the data sheet(21 page) about a decimation setup of GC5018?

Although the customer is going to set up 16 decimation (5Msps), it is requested that it will be saved if there is a reference value of CFIR and PFIR.

As long as there is nothing that matched, the information that specification is near may be sufficient.

Thank you for your consideration.

GC5330 for ET functionality

Dhaval Patel2 — Sun, 23 Sep 2012 05:31:29 GMT

Hi,

I want to use GC5330 with HAT modulator for only ET functionality. What are the software required for programing of GC5330 ?

design queries in GC5337

naresh kumar2 — Fri, 28 Dec 2012 11:18:54 GMT

Hi joe,

We have initially procured GC5337 eval board which has provision to test only transmit & DPD feedback chain. modifications in the RX chain was required and it was sent to TI office for rework

we have received the board now and we have the following queries :

   1. Rework list which u have sent along with the board doesnt have any changes with RX chain (GC 5337),
   2. Document says to enable OMAP's "flash_sel" pin (R176 with 0 ohm) and GP80 from FPGA will be used as an Enable pin "FLASH_SCSN" for serial flash instead of "spi1_enable_in" from OMAP ??
   3. why R110 and R167 were removed and DSPI1_SIMO_IN /DSPI1_SOMI_IN connections were interchanged (master and slave) ??
   4. kindly let us know if any software changes are required , we will be using the same configuration code in our design .

Kindly explain the purpose why OMAP in this case (after rework) uses serial flash (U43-M25P64)

In our design we will be using serial flash (U43) only for configuring FPGA and not for omap , since omap application code can be configured using Parallel NOR flash (U27-S29GL256P10TFI010).

RF application for amateur radio, HF ,VHF and UHF communications

David LeVan — Sat, 29 Dec 2012 16:28:45 GMT

I by no means am a digital or analog engineer, How ever I do have a dream of coming up with a simple inexpensive software defined radio kit for new ham radio operators to get high performance and low cost. I believe the development of this would not only further the art of amateur radio but would create a new market and spill over into the commercial sector.

Reg : GC5337, OMAP L138 & FPGA interface

naresh kumar2 — Thu, 20 Dec 2012 05:07:11 GMT

Hi,

In our RRH (Remote radio heads) for 2x2 LTE TDD design , we are using GC5337 & OMAP L138 for DUC,DDC,CFR & DPD functions .

We use an SFP module which interfaces to FPGA , FPGA receives baseband data along with certain other messages(channel activation/deactivation ) after CPRI deframing .

We need to have some interface from FPGA to OMAP to pass on these messages to OMAP ,since OMAP is the master which configures GC5337 & RF .

Can we use GPIO /SPI peripherals of OMAP to interface with FPGA to receive these messages or kindly suggest the alternative

currently on GC5337 eval board ,OMAP interfaces to FPGA and GC via EMIF interface. FPGA receives DPD coefficients from OMAP on this interface. Is this provision only an optional , can i use the same EMIF for passing on baseband messages to OMAP ?

GC5325 installation

Dayong Wang — Wed, 05 Dec 2012 19:01:54 GMT

I have lost my installation disk. The most files were backed up, but I couldn't find the correct MCR it requires. Does anybody have that MCR version?

Thanks

AE8406 as a multi-carrier receiver "digital low IF Weaver architecture"

yuha — Thu, 29 Nov 2012 16:42:53 GMT

Hello! I would use chip AE8406 as a multi-carrier receiver "digital low IF Weaver architecture" (see illustration). That is planned to use the chip in the "UMTS complex".

Questions:
- Do I understand, that AFE8406 DDC mixer - complex mixer (as I have quoted above figure)
- Is it possible to somehow compensate for the imbalance within the chip amplitude and phase I and Q quadrature I emerged after the analog mixer (with gains α and β to modify the I and Q signals)? Is it possible for this purpose to use the internal RAGC (though given that the external control amplifier connected to the AFE8406 with DVGA not in sight).

- is it possible to use RAGC Fixed gain of each of the quadrature

Designing GC5330/37 for Envelope tracking functionality

Dhaval Patel2 — Thu, 18 Oct 2012 09:17:09 GMT

Hello sir,

When we are using GC5330/37 for only ET purpose,

1) Is the sampled output of PA needed for GC5330/37 for ET operation only?

2) Since I have only low power upconverted RF as input, Is it possible to use IQ demodulator with ADC's output as baseband data input to GC5330/37 for ET operation only ?

3) To configure GC5330/37 for ET functionality what are the peripherals required ?

Regards,

GC5325SEK Feedback Power Level

Dhaval Patel2 — Tue, 16 Oct 2012 12:30:54 GMT

Hi,

While using GC5325SEK with External PA, What should be the maximum input power level to J46(RX0_IN) ?

I tried to give +10 dBm to 0 dBm to J46. After doing cal feedback, its shows that "Feedback power too low, check setup, check connections. Error Power = 39.1304", I set Tx atten. as 0 dBm.

Regards,

TSW 3725 configuration

Oscar Carrasco Quilis — Tue, 15 May 2012 12:00:20 GMT

Hello,

I have read that there are two ways of configuring the TSW:

- Matlab GUI (Standalone mode).

- tswconfig (SCBP mode).

I have noticed that if Iconnect the TSW output to a spectrum analyser, a tone appears in the selected LO frequency. However, this only happens when using the Matlab GUI, when we try to use the tswconfig application, nothing happens. It seems that the tswconfig application is not doing anything.

Why could this happen?

Thank you.

Strange steps in band (GC5016)

Ondrej Karas13780 — Mon, 10 Sep 2012 13:38:22 GMT

Hi,

I tried to create 4 independent channels with 5MHz bandwith, continuously behind. (Center at 85, 90, 95, 100MHz) on TSW4100. It works, but On the spectrum analyzer I saw some steps (on attached screen shot). Please could some explain what this steps means? I enclose screen shot of TSW4100 GUI also.

I am using Anritsu spectrum analyzer with trigger generator (0 dBm output power).

Thank you.

Ondrej