Products > Test Equipment

Possible GW Instek GDS-1000B hack

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TK:
I tested the BW after applying the 300MHz hack.

Test setup:

Signal Generator (Marconi 2024) --> SMA cable --> SMA_BNC --> 50ohm passthrough --> Scope input Channel 1 (1X attenuation)

Measured Frequency and Vpp

10MHz 1.2Vpp
100MHz 900mVpp (-3dB)
200MHz 280mVpp
250MHz 110mVpp
300MHz 48mVpp
350MHz 20mVpp (5mV vertical division setting)

Cannot measure reliable frequency at 400MHz and up.  I think officially it is a 100MHz front end.

Mortymore:
@TK

What are the bandwidth limit options with the 300MHz BW hack?

For the 200MHz, options are 20,100,Full.
Note that GW-Instek has the 1000B with 50/70/100MHz bandwidth selections.

TK:

--- Quote from: Mortymore on April 30, 2019, 03:41:45 pm ---@TK

What are the bandwidth limit options with the 300MHz BW hack?

For the 200MHz, options are 20,100,Full.
Note that GW-Instek has the 1000B with 50/70/100MHz bandwidth selections.

--- End quote ---
For 300MHz, BW limitation options are 20, 100, 200, Full.

TK:
I am not liking the refresh rate of the GDS1054B.  I am feeding an AM modulated signal and on both the Keysight 1000X and Rigol DS1054Z I can see a nice AM modulated waveform but on the GDS1054B I see single traces or at most 3-4 traces, but not the nice area filled trace like the other scopes.

The scope UI is very responsive like the Keysight, but I suspect the refresh rate is not near 50,000 wfm/s

nctnico:
The update rate depends on the memory depth setting. But don't expect a very graded signal. The GW Instek goes from like 50% to 100% in order not to hide any rare signal occurence.

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