This is actually a very good comparison, today we had an internal meeting and that was a hot point.
From today, we have the DHO900S for the next two week at our office to make tests.
Any question please ask.
Hi.
I have an MSO5074.
@simone.pignati offered the possibility of carrying out comparative tests between the MSO5074 and the HDO914S.
Originally the DHO914S has BW=125MHz and has an AFG (Arbitrary Function Generator).
The MSO5074 originally has BW=70MHz and has 2 Signal Generators, SG1 and SG2.
The BW of the two models are different. And the comparison may not be correct in many tests, near and above BW.
The DHO914S has 12bits of Vertical Resolution = 2^12 = 4096 steps.
And Horizontal Sampling Rate of 1.25MSa/s (for 1 channel connected).
The MSO5074 has 8bits of Vertical Resolution = 2^8 = 256 steps.
And Horizontal Sampling Rate of 8MSa/s (for 1 channel connected).
The DHO914S wins in the Vertical Resolution comparison: 4096/256 = 16x.
The MSO5074 wins in the Horizontal Sampling Rate comparison: 8/1.25 = 6.4x.
As a first idea, I suggest (Preheating = 30 minutes):
1. Simultaneously insert into both Oscilloscopes a Sinusoidal signal, without modulation, of 100mVpp, f=10MHz, with Z=50 Ohm, with a 50 Ohm coaxial cable, RG-58 or RG-316, or other. You can use SG1 of MSO5074.
2. Place a “T-BNC” on CH-1 of the MSO5074, continue with another 50 Ohm cable to CH-1 of the DHO914S, place a “T-BNC” and a terminating resistor of R=50 Ohm.
3. On the MSO5000 and DHO914S, activate Measurements:
Horizontal: Freq
Vertical: Vpp, Vrms
Statistic -> Count = 100
4. After 100 counts -> (STOP/RUN) -> Save the IMG on PENDRIVE, on each Oscilloscope.
Compare the Avg -> VRMS of the two models, and if interesting, the other Measurements in the Statistic mode.
5. Hi Resolution 12 bits on MSO5074:
MSO5074 -> Aquire -> Acquisition -> High Res.
(Repeat item 4) -> (STOP/RUN) -> Save the IMG on the PENDRIVE, on each Oscilloscope.
Compare the Avg -> VRMS of the two models, and if interesting, the other Measurements in the Statistic mode.
6. Simultaneously insert into both Oscilloscopes a Sinusoidal signal, without modulation, of 100mVpp, f=50MHz, with Z=50 Ohm, with a 50 Ohm coaxial cable, RG-58 or RG-316, or other. You have to use an external one: RF Generator or Waveform Generator.
7. (Repeat items -> 3, 4, 5).
8. Compare all the results from (item 4), and give your opinion.
Another suggestion:
If possible, use a DHO924S with BW=250MHz, and an MSO5074 with expanded BW=350MHz.
9. Simultaneously insert into both Oscilloscopes a Sinusoidal signal, without modulation, of 100mVpp, f=200MHz, with Z=50 Ohm, with a 50 Ohm coaxial cable, RG-58 or RG-316, or other. You have to use an external one: RF Generator.
10. (Repeat items -> 3, 4, 5).
11. Compare all the results from (item 4), and give your opinion.
12. Place the IMGs saved on the PENDRIVEs in this topic.
13. Comment on the loss of RF signal in the RF cables and connectors used.