Technical Topics > Software

DIGTRX - No RX Signal

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MDK2:

--- Quote from: K5KNT on March 25, 2018, 1854 UTC ---I am using DIGTRX v 2.14D, but I had not set the compatibility setting. I've done so now and have it running in administrator mode. So far, so good. I was able to get some text documents from a recording of HM01 that I played back with VLC.

Is there anything else we can do with these text files?

--- End quote ---

Excellent! Glad you got it working.

Anyway, I have no real answer for your question. I know nothing about codes, other than it's long supposed that they try to create truly random ciphers for one time use, which is impossible for anyone to break if they don't have the key. I keep a monthly HM01 log here at HFU, and make PDF's of the .txt files (so that they can't be changed intentionally or accidentally), and share them with the world via Dropbox. Maybe someone out there can find more of a use for them. I just do this for fun. Are they spy messages, or just gobbledygook to keep some CIA analysts busy and policy makers guessing? Who knows?

https://www.hfunderground.com/board/index.php/topic,40775.0.html  (this month's log)

Occasionally they send a file in either .f1c or .f1g format, which seems to be a kind of format that locks out portions of the text from edited, or fully copied or printed. You can see it on the screen, but good luck doing anything else with it. I share those as is. I think you can open them only if you are running Windows, unlike .txt or PDF files which are universal, but I don't really know. I couldn't find any real information about these formats or their purpose.

K5KNT:
Thanks for your help. Sometimes DIGTRX fails to decode, with various error messages. Bad block seems to be the most common.

I'm using web-based SDRs as my current location is not conducive to receiving HF very well. Ground floor apartment of a three-story building with high-voltage power lines directly across the street. No out-door antenna allowed.

MDK2:

--- Quote from: K5KNT on March 26, 2018, 1656 UTC ---Thanks for your help. Sometimes DIGTRX fails to decode, with various error messages. Bad block seems to be the most common.

I'm using web-based SDRs as my current location is not conducive to receiving HF very well. Ground floor apartment of a three-story building with high-voltage power lines directly across the street. No out-door antenna allowed.

--- End quote ---

You're welcome! And thank you - I had not seen the original post you linked, explaining that a serial port emulator was needed for DIGTRX to work with Windows 10. I have gotten version 2.14D now installed and set to the right compatibility and it's decoding fine. I'll try to see if that is also what was keeping 3.11 from working.

Sorry about your situation, but it is nice that we can hit remote SDR's when our own QTH has issues.

Pigmeat:
Speaking as someone who used to operate a numbers station, they're quite real. You need a knob to receive them properly.

MDK2:

--- Quote from: Pigmeat on March 28, 2018, 1820 UTC ---Speaking as someone who used to operate a numbers station, they're quite real. You need a knob to receive them properly.

--- End quote ---

I have an MFJ-16010ST wire antenna tuner that I keep nearby, just for such an operation. It's not connected to anything physically, but the spiritual effect upon HM01 reception can't be denied.  ;D

@K5KNT, I'm posting to say that I installed the last version of DIGTRX, version 3-point-whatever, on my Windows 10 laptop and it seems to be working. I had it freeze up completely once, which is not the way DIGTRX ordinarily crashes, so I had to use Task Manager to quit it. That hiccup aside, it worked when I tested it on an older recording, and also when I was listening live this morning.

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