Products > Test Equipment
REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
orbiter:
--- Quote from: borroz on June 22, 2013, 01:58:07 pm ---and another newbie DS2072 owner reporting here .. hi 8)
--- End quote ---
Welcome to the site/thread, and have fun with your new scope. Tons of advice available here from the guys in the know if you get stuck :)
Chet T16:
I may as well check in as I've ordered a DS2072 as an upgrade from my DS1052.
Wim13:
Comparing Bandwidth of Rigol 2072 and 2202
I have measured the bandwidth of a Rigol DS 2072 ( 70 Mhz ) and a DS 2202 ( 200 Mhz )
with the same setup and same equipment. To see how the graphs looks like...
See attached graph.
First measured with a measuring head on the input of the DSO, and second
just with a 50 ohm terminator on the input. Gives a nice picture of the internal compensation.
Always lot of comment when using Mheads, but is in my opinion the best.
Try for example a 10 ohm terminator and you get totaly other results.
Someone ever decided to use 50 ohm, but why...??
egonotto:
Hello Wim13,
can you please explain what a measuring head does.
Is it that it measure the signal at the input of scope and adjust the signal at generator, so that the amplitude of the signal at input from scope is always the same?
Best Regards
egonotto
Pinkus:
--- Quote from: Wim13 on June 23, 2013, 01:46:06 pm ---Someone ever decided to use 50 ohm, but why...??
--- End quote ---
The common wire impedance of 50 Ohm is a compromise between good power handling (30 Ohm) and low cable loss (77 Ohm).
Thats why TV cables have 75 Ohm, they do not need to transport high power.
P.S. Check this link for deeper explanation: http://www.microwaves101.com/encyclopedia/why50ohms.cfm
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