Great video, Len - thanks! I just did your calibration procedure on my mod'ed 815. I live in New Mexico, and was able to hear a decent WWV signal today on 25 MHz, and everything went fine. I only needed to change the factory RefDAC setting by two to get within 1 Hz at 25 MHz. I don't think folks who have factory stock units will be able to get as close with this method, though. Maybe for them, coupling the 815's 10 MHz output loosely to a receiver tuned to the WWV signal at 10 MHz, and adjusting the RefDAC setting for an audible zero beat might work. Or connecting a short antenna wire to the TG output, set to zero span at 25.0 MHz, and zero beat with WWV? Cheers, Chris
When doing precision calibration of TV broadcast carrier, we would monitor WWV frequency on an HP device with a chart recorder over a period of a couple days. There was a very minor sinusoidal frequency drift caused by daily atmospherics. We had to find the average of the daily drift in order to predict the exact WWV frequency. Time consuming, but accurate.
Good Morning! KDORC, Would you like to know where the Rigol network of technical assistance in the United States of America is located ?. Do you have an email so I can ask you some questions about the DSA815TG? Very grateful and I await your contact. Thankful. Alandex Santos.
Hi Doug, I think I found it on EEVBlog (Dave Jones' channel). I believe that it only works on older 815s. Rigol changed the bootloader so that newer units can't be hacked using the method that I used.
I just installed the 00.01.19 firmware and also found the keystroke sequence no longer works to access the service menu. Maybe it has been changed. Does anyone know how to access the service menu with the newer firmware?
Great video, Len - thanks! I just did your calibration procedure on my mod'ed 815. I live in New Mexico, and was able to hear a decent WWV signal today on 25 MHz, and everything went fine. I only needed to change the factory RefDAC setting by two to get within 1 Hz at 25 MHz.
I don't think folks who have factory stock units will be able to get as close with this method, though. Maybe for them, coupling the 815's 10 MHz output loosely to a receiver tuned to the WWV signal at 10 MHz, and adjusting the RefDAC setting for an audible zero beat might work.
Or connecting a short antenna wire to the TG output, set to zero span at 25.0 MHz, and zero beat with WWV?
Cheers,
Chris
When doing precision calibration of TV broadcast carrier, we would monitor WWV frequency on an HP device with a chart recorder over a period of a couple days. There was a very minor sinusoidal frequency drift caused by daily atmospherics. We had to find the average of the daily drift in order to predict the exact WWV frequency. Time consuming, but accurate.
great video, really worthy. thanks a lot
I just plug my rubidium standard into the ext ref jack on the back. Nailed to within a millihertz with no fuss, no muss.
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Is wwv atomic clock? If I'm in croatia can I receive wwv signal with proper antena?
Good Morning! KDORC,
Would you like to know where the Rigol network of technical assistance in the United States of America is located ?.
Do you have an email so I can ask you some questions about the DSA815TG?
Very grateful and I await your contact.
Thankful.
Alandex Santos.
Hi is there a way to calibrate the amplitude
Hi Craig, I am sure there is, but I don't know what it is. Info is a bit lacking on these spectrum analyzers.
Where can I find the 10hz hack?
Hi Doug, I think I found it on EEVBlog (Dave Jones' channel). I believe that it only works on older 815s. Rigol changed the bootloader so that newer units can't be hacked using the method that I used.
Updated firmware to 00.01.18.02 and cant get into the service menu since the update. Anyone else having the same problem?
The button sequence now requires two presses of the MEAS SETUP button after pressing the STORAGE button as shown in the video.
I just installed the 00.01.19 firmware and also found the keystroke sequence no longer works to access the service menu. Maybe it has been changed. Does anyone know how to access the service menu with the newer firmware?