EEVblog #325 - Rigol DG4162 Voice

An update on the voice waveform in the Rigol DG4162 ARB Generator.

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[TheXGamer]

That is a "G", not an "M" in the middle of that word; "REMAL" is what I hear, EVERY time, no matter the frequency.

[sbreheny]

Dave: I notice that you also changed from AC coupling to DC coupling on the counter between when it failed to work at low frequency and when it began working. Could that be part of why it was not counting reliably and there was a low-frequency cutoff?

[EEVblog]

Of course I could have, but I didn't edit it out because I think it's valuable content to show what conclusion I jumped to at first glance.

[mikeselectricstuff]

I think it only uses recip counting at the longest gate time setting.
It displays far more digits than are meaningful. Not helped by the counter gate times being binary multiples of the 500MHz clock, not decimal, so you get odd rounding errors on round values..
It really should suppress the meaningless digits as it just makes it look crappy.
It also fails to blank the display when the input is disconnected (although the lack of meaningless fluctuating digits give a clue..!)

[mikesradiorepair]

Recently got a 4102 and everything was looking good until I applied AM modulation. It falls flat on its face. Carrier level drops and sideband levels are not correct. Contacted US Rigol customer support and they confirmed that they could duplicate the problem and they would send a "bug report" to Rigol headquarters. Got a reply yesterday, basically telling me it's working properly and as designed even though the output power level obviously falls out of advertised spec under modulation. Basically tough luck buddy, your screwed and there ain't nothing were going to do about it. Last piece of Rigol gear I ever buy. Posted a video of the problem to demonstrate it so no one else gets screwed.

Mike

[DirkIronside]

My classmates thought it sounded like MEATBALL MEATBALL MEATBALL.

[kidbk]

Great video Dave! You are making me want to try a Rigol. That indicator/cursor dot was plenty visible here in 1080p, but then again, my eyes probably don't report to me in 1080p resolution.

[riakata]

I was looking at some random electronics videos and noticed the similar looking rigol function gen but it doesn't use the dots but highlights things instead. Maybe the demo unit has an older firmware?

[mbainrot]

What causes the 50Hz noise when one touches the probe? I am guessing the human body acts as like a giant antenna and picks up all of the EMF from the mains?

[Byudda]

where in the O&T manual does it say you can insult the people that let you review their products LOL  But I agree, a colored background around the highlighted selection would be an upgrade.

[pychneag]

Does the encoder knob push in to act as 'enter'??

[smeuse]

I was thinking the exact same thing, and came here specifically to comment that! You beat me to it...

[EEVblog]

No, that's wasn't it, it was simply the gating time.

[NeoMorphUK]

If you are using coloured backgrounds, stay clear of red and green if possible as 1 in 12 men and 1 in 200 women have some type of red/green colour blindness. I can hardly see the green selection background yet can see the yellow dot really easily, so use either a black text on yellow or white for highlighting is better and a blinking cursor UNDER the letter works better.

[echen]

Their equipment is actually quite good, and they are trying quite hard to move up to the higher end.

[kennybode]

Hmm what is the point whit the voice waveform ??

[NDRSV]

Did you connect speakers directly to the generator or through an amplifier?

[WooShell]

If that's really saying "Rigol", I don't want to know where that was actually recorded. Sounds more like "remark" or "Wima" to me.. no "g" sound in there.

[originalmianos]

You finally found a use for the power supply, a brick to support things. I am a bit worried it is going to fall over. :(

[RWoody]

Almost sounded like "Rimmer" to me, smegheads! :D