Products > Test Equipment

Has anybody enabled Tracking Gen on Agilent N9340B?

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Mallocated:
I've found photos of another Agilent board with the same MSB-01 and MSS-B labels, so that points to Agilent manufacturing.

The module's G253 GPS patch antenna is by Inpaq www.inpaqgp.com


Also there's the logo next to the sticker that looks like FP or PF of you rotate it 90deg.

That's where the trail goes cold for me. 

Keysight still list the GPS module part for $339
https://www.keysight.com/my/partDetail/N9344-65011







nexus:
Replacement tants came in today, so while I was putting those on the main board I also elected to have a look inside the GPS module.

Definitely is a little custom agilent board. Looks like the module is mainly a GlobalSat EB-3531 SIRF III with a 50 ohm bidirectional coupler and some matching network and filtering passives. If you have the pinout, might be able to reverse engineer and make one that's plug and play.

Mallocated:
When you look at the design and build quality you can see why the module pricetag is $350.

I fitted a cheapo Adafruit Ultimate GPS breakout board to mine, which has a Globaltop FGPMMOPA6H module with MediaTek MT3339 GPS Chipset.  I had to change the module baud rate to match what the instrument was expecting, which meant reflashing with an altered firmware.  If anyone needs the full process I'll start a new post.  Quite a long process, it would be heaps easier if there is a compatible SIRF-based module out there.

Thanks for disecting your GPS module - for the greater good.

milesd969:
I'm new to the forum, I would ask for help I have an agilent n9340b, it can't raise the Agilent logo system on the display and that's it.
I will attach a file from the serial console, any help is welcome flash file I would try to write it in my SA, thanks

analogRF:

--- Quote from: milesd969 on February 15, 2022, 10:50:36 am ---I'm new to the forum, I would ask for help I have an agilent n9340b, it can't raise the Agilent logo system on the display and that's it.
I will attach a file from the serial console, any help is welcome flash file I would try to write it in my SA, thanks

--- End quote ---

Looks very much like the nand flash device is defective or at least corrupted. But most likely the chip itself is bad. Assuming the power supplies are OK

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