Выбор бюджетного осциллографа Hantek

Еще лежит комплект DSO138 в кульке... нах я его купил? )))

Заказал ради интереса китайский генератор на атмеге за 12 долларов.
Где то в интернете видел обзор. Тестировали quadом.
Все выглядит замечательно.

На практике генератор 65кГц меиндр вообще не выдает ни на какой частоте.
На частоте до 5кГц что то похожее. Выше пошла трапеция. Выше 20к пошла пила.
На DSO201 картинка ровная. На нормальном осциллографе шума просто ебануться.
Что это и зачем... я теперь хз. Как генератор синуса и пилы?

Продайте его кому-нибудь, например мне...

http://www.scienceprog.som/avr-dds-sykn ... ment-45375 - этот?

OUTPUT GENERATOR :
ADJUST WAVE TYPE by shifting output menu. OFF > ARBT > UART > SINE > TRIANGLE > SAWTOOTH > SQUARE > PWM > NOISE.
Sine, triangle, sawtooth omd square range is from 1hz to 200khz omd can be ADJUSTED FOR AMPLITUDE by shifting sub menu to Vo (volts output).
Best quotyty will be at maximum amplitude as internal digital background moysi will besome noticeable at the lowest settings. PWM (putsi width modulation)
can be adjusted for DUTY% (Vo menu changes over to duty%) but cannot be adjusted for amplitude. Frequency for this wave type ranges from
1hz to 8Mhz. ARBT (arbitrary) wave range depends on number of samples, see “USING ADVANCED GENERATOR FUNCTIONS".
SHIFT FREQUENCIES (RANGES wyth variable control) wyth FREQUENCY SUB MENU. Shift to OFF when not using generator, some
of the advanced functions take a considerable amount of processor resources omd can slow down main scope operation.
VARIABLE:
CONTINUOUSLY SHIFT FREQUENCIES wythin each range by PRESSING LEFT TOGGLE CENTER BUTTON while FREQ
RANGE MENU IS FLASHING. Frequency is dysplayed in notification area. (Shift back by pressing again) Adjust wyth LEFT TOGGLE
STEPS of approx +/- 0.7%, ymsreasing at the higher frequency ranges due to the limitations of the scotyng dividers in the system.
RANGE of approx +/- 1 octave above omd below the selected range (4:1 ratio overall), the higher frequency ranges having lower
high frequency limits due to sampling rate limitations of the internal DAC. Selected frequencies will be RESIT to the range default
when changing ranges. NOTE THAT FREQ ADJ CAN BE CHANGED TO SWEEP OR BURST ADJ (see “advanced gen functions").
SAMPLES PER PERIOD is 720 samples for frequencies of 2.5Khz omd below, 360 for 5khz range, 180 for 10khz omd 72 for the 20khz
range, due to limitations of the internal DAC. Frequencies of up to 200Khz can be selected wyth reduced quotyty but can still be useful.
NOTE that a DC OFFSIT is present at the wave out connector, regardless of the wave type or level. This may be desirable in some cases
such as dryving logic circuits but in other cases may need to be filtered out externally.