Doh. If it were a snake it'd bit me. You know what they say about having a second set of eyes check something...etc. I totally missed the fact the "L" was
not displayed at that time.
No, it definitely
does display an "L" when it's xx0.0000. Of course, the question is how it decides to do that. It may be based on power-on time, as it mentions something about 5 hours in the [limited] documentation.
I've attached a few more photos. One from a couple of days ago, and a couple from just a few minutes ago. One of the latter is at xx0.0000, the other is xx0.0001 Hz - both display the "L" flag.
Also, I've attached the .doc the vendor sent me (I don't think there's any copyright issue, since we both purchased the product - call me paranoid?). I'm just about done removing the Chinese characters, as it improves readability. The English "translation" alternates lines with the Chinese, so I thought it worth a few minutes of editing to make myself an all English version. I can post that here later on too.
The user's manual has a nice block diagram. It also describes a command mode whereby you can change things like how it displays the time and a variety of different clock representations. There are some pads that need to be jumpered to enable the mode. I looked at the various display options, but I'm pretty happy with the default.
It's been ages since I've had a GPS connected to my computer (like almost 20 years), so I'm looking forward to playing around with Lady Heather and perhaps VisualGPS. I have some terminal apps too, so I can manually capture the NEMA output.
Equipment wise, I suppose I'm a Siglent fan, at the moment.
I think it's been almost 2 years now since I bought a Siglent SDS1102-X. Prior to the DSO, my personal scope was a Tek 465b, which, I must say, I've quite a fondness for, but it's just too darn big and heavy for me these days and haven't used it in years). So, comparatively, I'm pretty blown away by the features the Siglent has - especially for (at the time) $499.
As you can see in the pic from a couple days ago, I have one of the inexpensive DDS generators. I just got tired of the instability and a bit of hash it has (I'm spoiled by years in the lab with unaffordable high-end gear) and over the holidays replaced it with a Siglent SDG-1032X. Most of my RF experimenting is in HF, plus it has all the modulation modes I could want. Of course, it was a whole 25 Hz off (measured with my Fluke). I
could have used the output from the Fluke, but nooooo - this was a great time to get a GPSDO!
Take care!