Hello,
i'm new to eevblog forum and was looking for an inexpensive arb-gen to fulfill my hobby-needs. Thanks to aghp and his extensive testing i consider buying an SDG10xx.
I'm unsure about one thing though: The specs state that arbitrary waves can be generated with frequency up to 5MHz. Does this mean,
a) that the actual bandwidth in arb-mode is 5MHz, that is, a 5Mhz lowpass is switched between dac and bnc?
b) that the repetition rate of the arb-pattern is 5MHz at maximum, but the signal itself can have higher bandwidth?
In the last case, what is the maximum bandwidth in arb-mode?
At 125MSa/s, i assume that the analog circuitry will diminish the theoretical 62.5MHz, but i would be really interested how far. Does the stated noise bandwidth relate to this?
From aghp`s tests a saw a rise time of 8ns for pulses with the SDG1010, which would equate to about 45MHz, while noise should be up to 10MHz.
I'm now somehow curious to know what happens in arb-mode. Could someone test this? I have attached a csv with 16 square cycles which would give a 62.5MHz square at 3.90625MHz, which of course should give a sine at this frequency, but lower would be interesting for me to see.
Thanks in advance!
Greetings from snowy germany
,
Roger