Author Topic: Spectrum Analyzer - Rigol DSA815 (Read 618321 times)

videobruce · « **Reply #575 on:** March 27, 2015, 10:16:07 am »

Will that keygen work with the 832 series??

johnny_canuck · « **Reply #576 on:** April 03, 2015, 02:05:08 am »

Is the firmware V 1.12 posted anywhere? I've requested it from Rigol twice now with no response from them.

Ken

Björn · « **Reply #577 on:** April 03, 2015, 07:24:29 pm »

Quote from: johnny_canuck on April 03, 2015, 02:05:08 am

Is the firmware V 1.12 posted anywhere? I've requested it from Rigol twice now with no response from them.

Ken

Hi Ken

https://www.dropbox.com/sh/nadk0tpyd0gfkoh/AABk-mhGabX0qBBpksZC4mrRa?dl=0

jamessawle · « **Reply #578 on:** April 04, 2015, 01:06:49 am »

OK, I think I know the answer to this anyway, but would like it confirmed by anyone much wiser than I.

I have a DSA815-TG with the following spec:

Serial: DSA8A1622xxxxx
Main Board Version: 00.07
Version of Radio Frequency Board FPGA: 0.05
Version of Digital Board FPGA: 0.04
Version of Firmware: 00.01.09
Version of Boot: 00.01.04

My question is thus:

1. Is this at all downgradable to what ever version I can unlock the features on (00.01.07 or 00.01.08)?
2. If so does anyone have the relevant Firmware anywhere?

Heres being hopeful.....

James

N8AUM · « **Reply #579 on:** April 04, 2015, 03:33:17 am »

Quote from: jamessawle on April 04, 2015, 01:06:49 am

OK, I think I know the answer to this anyway, but would like it confirmed by anyone much wiser than I.

I have a DSA815-TG with the following spec:

Serial: DSA8A1622xxxxx
Main Board Version: 00.07
Version of Radio Frequency Board FPGA: 0.05
Version of Digital Board FPGA: 0.04
Version of Firmware: 00.01.09
Version of Boot: 00.01.04

My question is thus:

1. Is this at all downgradable to what ever version I can unlock the features on (00.01.07 or 00.01.08)?
2. If so does anyone have the relevant Firmware anywhere?

Heres being hopeful.....

James

Bootloader 1.04 will not allow anything prior to firmware 1.12 so unfortunately your stuck. Is anyone trying to work out a solution ?

g8bnr · « **Reply #580 on:** April 04, 2015, 05:56:34 am »

Hi,
I have found an alternative method for downgrading the firmware, my boot loader is version 00.02, so it may not work for you, but worth a go.

Put the firmware .sys file onto a USB stick with nothing else. With Power OFF, insert the stick. Power ON, when the boot from UDisk message appears in lower left corner, immediately, press the GREEN 'Preset' button. The firmware should load from the stick.

I used this to downgrade from V1.12 to V1.06 on my unit.

jamessawle · « **Reply #581 on:** April 04, 2015, 07:47:56 am »

Where do I find firmware 0.07?

g8bnr · « **Reply #582 on:** April 04, 2015, 08:25:31 am »

Send me an email address and I will send it to you.
73 Dick

jamessawle · « **Reply #583 on:** April 04, 2015, 11:03:22 am »

Just for the fun of it I tried to downgrade it with 00.01.07 but all I got was:

Testing u-Disk (Please insert U-Disk)

N8AUM · « **Reply #584 on:** April 04, 2015, 01:19:49 pm »

Having bootloader 1.04 I can only load 1.09 or 1.12. If I try 1.07 I get "Failed...(Read DSA800 Series UpdateFile Error"

I downloaded 1.07 from somewhere from here but maybe I have corrupted file ? Can someone who has known working 1.07 please send me a copy at n8aum at yahoo dot com

Teneyes · « **Reply #585 on:** April 04, 2015, 09:18:19 pm »

Quote from: g8bnr on April 04, 2015, 05:56:34 am

Hi,
I have found an alternative method for downgrading the firmware, my boot loader is version 00.02, so it may not work for you, but worth a go.
.....
I used this to downgrade from V1.12 to V1.06 on my unit.

Yes you have Old Boot Loader , which is important
Boot Loader 1.04 is the Boot that Stops going back to older FW

jamessawle · « **Reply #586 on:** April 04, 2015, 09:32:50 pm »

Yep, Defiantly does not work! looks like I have to fork out £500 for something that I will use maybe just twice a month....

Is someone working on a new KeyGen for this do we know?

Till then Fingers Crossed...

Thanks a lot for those that sent me the two firmwares to test, much appreciated.

James

johnny_canuck · « **Reply #587 on:** April 05, 2015, 06:41:08 pm »

On the Rigol Corporate web site (http://www.rigol.com/prodserv/DSA875/document/) there's a new User's Guide, released March 12 2015.
They state that it's applicable to instruments with firmware revision 00.01.13.
Does anyone know of an imminent update?

Ken

videobruce · « **Reply #588 on:** April 05, 2015, 07:33:34 pm »

That link only has Chinese characters.

ted572 · « **Reply #589 on:** April 05, 2015, 10:52:00 pm »

Re. The new DSA815 User Guide, March 2015, for Firmware 00.01.13 (with a fix for the Newer DSA815-TGs with Main Board Ver. 7 or 8, for Power Sweep mode, etc.):

Go to: http://www.rigolna.com/products/spectrum-analyzers/dsa800/dsa815/

Under [Documents] - Select (the PDF) 'DSA800 Series User's Guide'

Sign in with your information: Select 'Submit', and it will down load for you.

Or just go directly to -> http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0503/1/-/-/-/-/DSA800_UserGuide.pdf and it is yours!

Ted

PS Firmware 00.01.13 may still NOT be available as of today, Apr. 6, 2015 (I haven't seen it yet). Hopefully it will be released soon (?).

N8AUM · « **Reply #590 on:** April 06, 2015, 10:36:45 pm »

From the latest users manual "Do Not Operate in an Explosive Atmosphere"
well damn, kind of takes the fun out of it !

XFDDesign · « **Reply #591 on:** April 06, 2015, 10:57:14 pm »

Quote from: N8AUM on April 06, 2015, 10:36:45 pm

From the latest users manual "Do Not Operate in an Explosive Atmosphere"
well damn, kind of takes the fun out of it !

It must be sparking inside, and so one should avoid eating beans and/or cabbage.

g8bnr · « **Reply #592 on:** April 08, 2015, 10:20:18 am »

Has any genius found a way for the V1.04 boot loader to be changed to V1.02? This would resolve a lot of people's issues. I am lucky my unit uses V1.02 boot loader.

Dick

Gunb · « **Reply #593 on:** April 08, 2015, 07:18:02 pm »

Quote from: g8bnr on April 08, 2015, 10:20:18 am

Has any genius found a way for the V1.04 boot loader to be changed to V1.02? This would resolve a lot of people's issues. I am lucky my unit uses V1.02 boot loader.

Dick

It might depend on the hardware, i.e., it's not automatically said that an older bootloader works fine with recent hardware.

Mine is 1.02 but flashed fw V1.12. Bought my DSA815-TG years ago. Think the bootloader will stay at V1.02 since V1.04 only works with newer hardware where option keys do not work anymore.
Vice versa it might mean the above, that recent DSAs can't be reflashed with V1.02 working reliable.

KD0RC · « **Reply #594 on:** April 11, 2015, 02:21:10 pm »

I have a question about a Return Loss Bridge result. A 50 ohm resistive load shows a loss of 39.41 dB. An antenna shows 44.51 dB at its resonant point. So in a 50 ohm antenna system, how can the antenna show more loss that the 50 ohm resistive load? The feedline to the antenna is about 6 feet of RG-58. The antenna is J-Pole tuned to 145.6 MHz.

The yellow trace is the antenna and the purple trace is the 50 ohm resistor.

Thanks,
Len

Howardlong · « **Reply #595 on:** April 12, 2015, 08:22:12 pm »

Could be a number of things, innacuracy in the return loss bridge, in the termination, cable/feeder.

When doing this stuff on a VNA rather than a scalar analysis on an SA with a return loss bridge, typically it will be cal'd at the point you're trying to measure, with a short, open and load. Corrections can then be made for any innacuracies. Some of those cal kits can cost more than an SA.

That plot looks reasonable enough if it's for 144-148MHz.

hammy · « **Reply #596 on:** April 12, 2015, 08:46:20 pm »

Quote from: KD0RC on April 11, 2015, 02:21:10 pm

I have a question about a Return Loss Bridge result. ...

Do you followed the procedure in the manual about "VSWR" on page 2-51 and 2-52 ?

Cheers
hammy

KD0RC · « **Reply #597 on:** April 13, 2015, 02:53:34 am »

Thanks for the response Howard. For my purposes, it is fine but I expected the 'best' point to be defined by the 50 ohm terminator and was surprised to see over 5 dB more return loss at the resonant point of the antenna. It feels like there is something else going on that I don't have an understanding of... Accuracy of the RLB should not be a factor becaus this is a relative measurement between the 50 ohm terminator and the antenna - right? The terminator measures 50.06 ohms on my BM 869 meter so I think that would not be off enough to matter. I swapped cables, but the results were the same. Could there be some other reactance happening that could cause this? In other words, since this is a SA and not a VNA (and therefore I don't see the reactance vector), if I am not at 50 - j0 but some other reactive value, could it show a higher return loss than the 50 ohm resistive load? (RF does mystify me sometimes...)

Hi Hammy, I normalized, then put the 50 ohm terminator on to get the purple trace, and then the antenna to get the yellow trace. I get the same results when I use the VSWR function. For this screen shot, it was easier to just show the return loss directly insteadof invoking the VSWR function.

Len

Ivan7enych · « **Reply #598 on:** April 13, 2015, 10:58:45 am »

As I understand, the non-ideal bridge outputs some -40dB signal even when there's no reflection. And the reflection from the antenna can make sum or difference (depending on phase) with this bridge signal, making total output larger or lower.

You can add some cable between antenna and SWR bridge (to change antenna reflection phase), and compare the results. -35dB and higher should be almost the same, -35 and lower - can be very different.

K5HJ · « **Reply #599 on:** April 13, 2015, 06:46:02 pm »

That is the nature of the bridge circuit. There will always be some load on the unknown port that will produce a return loss approaching -infinity dB. Just how far it will go depends on losses in the bridge itself.
Your antenna has just enough reactance to make the bridge happier than the 50 Ohm resistor. Down at these levels, it really doesn't matter.

Randy


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Author Topic: Spectrum Analyzer - Rigol DSA815 (Read 618321 times)

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