TESTS: Siglent SDG5082 Function/Arbitrary waveform generator. (+Inside images.)

[rf-loop]

I have test the result that at 50ohm,0dbm and 1KHz square wave

with my SDS1102CM, and I found it's Vpp=896.0mV
I think maybe you check whether it is correct

And your oscilloscope have 50 ohm input impedance? 

[rf-loop]

SDG5082   
Output 50ohm, 1kHz Square 50%  duty, DC offset 0, level 0dBm.

Result with oscilloscope:
HP54522A 50ohm input:

Vampt 450.74 mV
Vp-p 458.38 mV

Average 1024:
Vacrms 225.31 mV
Vdcrms 225.31 mV

Note: specifications about Oscilloscope and SDG level and input/output  impedance accuracy!



SDG5082  result with power meter: HP437B + HP8482H sensor

Output, 50ohm, 10MHz Square 50% duty, DC offset 0V, Level 0dBm
Result: -0.31dBm

Same but 1MHz Square
Result: 0.08dBm

10MHz Sine, DC offset 0, Level 0dBm
Result: 0.02dBm

Same but 1MHz Sine
Result: 0.08

[Siglent]

The firmware of SDG5000 has updated to 5.01.01.10
and the firmware of SDG1000 has updated to 1.01.01.31
you can download them from our website.
http://www.siglent.com/en/server/download.aspx?nodecode=119004002006

[grego]

The firmware of SDG5000 has updated to 5.01.01.10
and the firmware of SDG1000 has updated to 1.01.01.31
you can download them from our website.
http://www.siglent.com/en/server/download.aspx?nodecode=119004002006

Some release notes would have been nice.  Whats changed?  What's fixed?  What's different?

[grego]

Hey Siglent - are there any release notes for this new firmware?  I don't know anyone who likes to blindly install firmware on their gear without an inkling of what the changes are.

[Siri]

rf-loop, Siglent,

Does SDG5082/5162 blending mode (summation) of the signals from the two channels?

For example, if required to form one channel AM-modulated signal on the shortwave band simultaneously with a certain pulse signal (noise)?

[Henrym3]

I am considering using it with a 5mhz ULTRASONIC TRANSDUCER .... do you think it is possible ?

Infact, I was wondering if I can make a transducer like this http://www.amazon.co.uk/Generic-Intelligent-Ultrasonic-Thickness-1-2~225mm/dp/B00EQ1X6N2 (it uses 50mA) , working with my SDG5082 ?

What do you think ?

[Siglent]

rf-loop, Siglent,

Does SDG5082/5162 blending mode (summation) of the signals from the two channels?

For example, if required to form one channel AM-modulated signal on the shortwave band simultaneously with a certain pulse signal (noise)?

You can use the Easywave software to accomplish  this function.
In the "Math--Arithmetic Math--Two wave math" menu, you can synthesis two waveform into one waveform by addition/subtraction/multiplication operation. And then send the waveform data file to SDG5000 generator to output it.
For the waveform which have already stored in the generator(5 standard waveform, 46 types built-in function waveform and 10 custom waveform), you can send to Easywave and operate them directly. For the others waveform, you need edit the waveform by yourself.

[Siri]

Thank you, Siglent.
EasyWave created and sent in generator a complex signal may change slightly in the future in terms of the parameters (frequency carrier, noise pulses period, etc.) without a computer operatively in the generator?

[rockandroll]

@Siri
Do you mean blending mode(summation) like Siri asked ?

I am considering using it with a 5mhz ULTRASONIC TRANSDUCER .... do you think it is possible ?

Infact, I was wondering if I can make a transducer like this http://www.amazon.co.uk/Generic-Intelligent-Ultrasonic-Thickness-1-2~225mm/dp/B00EQ1X6N2 (it uses 50mA) , working with my SDG5082 ?

What do you think ?

[Henrym3]

No, I was just interested in driving 2 ULTRASONIC transducers, using my SDG5082.

Did any of you have any experience using it with ultrasonic ?
Do you think is possible (or the SDG5082 mA power is not enough) ?

[Farrari]

No, I was just interested in driving 2 ULTRASONIC transducers, using my SDG5082.

Did any of you have any experience using it with ultrasonic ?
Do you think is possible (or the SDG5082 mA power is not enough) ?

how about the impedance ?

[Siri]

Acquired SDG5162 and faced with the fact that the generator is very dirty spectrum of a sinusoidal signal 
Pictures from rf-loop at the beginning of the theme just exemplary in comparison with the spectrum SDG5162!





Occurs parasitic frequency modulation signal. Modulation frequency and the deviation increases with programmable frequency sinusoidal signal at the output.

[Siri]

Continuing study SDG5162, found an error in adjusting the output level.
If you use the dBm-scale output, the setup level since -40 dBm and below an error, the actual output level at 1 dB less than the set:

Setting  /  Out.
...
-38 dBm / -38 dBm (OK)
-39 dBm / -39 dBm (OK)
-40 dBm / -41 dBm
-41 dBm / -42 dBm
...

Update:
More precisely, an error occurs when switching between -39.6 dBm and -39.7 dBm
(at this point inside the generator relay switch clicks next level range)

[Farrari]

Your image can not be displayed

[Siri]

Strangely. I checked with several computers, pictures visible.
Maybe your provider blocks somehow photo service from russian Yandex (?)

[Henrym3]

The transducer cable impedance  is 50 ohms.

Will it work ?

No, I was just interested in driving 2 ULTRASONIC transducers, using my SDG5082.

Did any of you have any experience using it with ultrasonic ?
Do you think is possible (or the SDG5082 mA power is not enough) ?

how about the impedance ?

[Herman]

according to the datasheet of SDG5000,CH1/CH2<40MHz: 1mVpp~10Vpp(50 ohms),
when the impedance is 50 ohms,
Vrms=10V/(2*1.414)=3.54V,
current=3.54V/50ohms=0.0708A=70.08mA,
so the max output current is 70.08mA.may it help

[Henrym3]

Thank you Herman , very useful !

So based on your calculation, I should feed them with 2.5 Vrms each, to get the required 50mA power to drive them. Correct ?

according to the datasheet of SDG5000,CH1/CH2<40MHz: 1mVpp~10Vpp(50 ohms),
when the impedance is 50 ohms,
Vrms=10V/(2*1.414)=3.54V,
current=3.54V/50ohms=0.0708A=70.08mA,
so the max output current is 70.08mA.may it help

[Herman]

yes, and your Ultrasonic Thickness Meter Power supply:3 x 1.5 AAA Alkaline Batteries(not Included) ,why don't you use  DC output.

[Siri]

Siglent,

What can you say about a dirty sine wave. It is normal for SDG5xxx or my device is defective?

[Herman]

Siri
This is the test result with my Agilent 8596E which is old, and the spurious signal data of SDG5000.


By the way ,how about your frequency modulation signal setup?(FM frequency,FM dev)

[Siri]

Herman
When watching spectrum of the generator, modulation was off course.
Try to look more high-frequency signals (25, 50MHz and above).
Operating frequency of 10 MHz is not very revealing. While here, you can see that the declared parameter -116 dBc fails.

Siglent,for what frequency spacing specified in the characteristics "-116dBc/Hz low phase noise (SSB) signal output"?

Find more here
http://www.siglent.com/UploadFiles/en/Files/DataSheet/SDG5000_DataSheet_en.pdf
"100 kHz Offset,-116dBc/Hz (typical value)"
Anyway, in the band 100 kHz nothing like this.

Update.
Sorry. Spacing at 100 kHz noise -116dBc/Hz really turns out to stretch. But on a smaller distance from the center frequency of the signal is very dirty and call it a "low noise" does not. And the more the set frequency, the worse.

1MHz sine wave



5MHz sine wave



25MHz sine wave



50MHz sine wave

[rf-loop]

Perhaps you have allready carefully readed these some tiny tests:
https://www.eevblog.com/forum/testgear/tests-siglent-sdg5082-waveform-generator/msg273815/#msg273815

Note that even HP8568B (and it is quite good (traditional spectrum) for this) can not measure phase noise enough down specially between 10k to 100k from cf.  (look reference line made by HP8644B what is not so bad signal gen)
(note: these kind of methods do not really measure phase noise! )

[Siri]

rf-loop
Thanks for the link and your work.
Oh, to see the "tails" with the level of -20 ..-40dB does not need much effort or special equipment or techniques.

Here is an example of another generator, which is considered an average purity of the output signal:

1MHz



5MHz



25MHz



You see difference with the pictures of SDG5162 above..