GW Instek GLA-1000 Series User Manual - Manual (Page 105)

FAQ
105
FAQ
The USB is slow, though the PC is USB 2.0 compatible.
Make sure the cable is compatible with 2.0 high speed (use the
attached one).
The message “Hardware connection failed” pops up.
Make sure GLA is powered up and pressing the Retry button.
Disconnect/reconnect USB cable.
Do not use extension cable for USB. Make sure GLA and PC are
connected by a single USB cable.
GLA does not capture signal, or the result is inaccurate.
Check all signal connections, including the ground terminal, are
secure. Use both 2 GND cables for stable ground connection.
Make the distance between GLA and device under test as short as
possible.
The sampling rate has to be more than four times that of the
signal frequency.
Regarding trigger: Make sure the trigger threshold matches the
signal settings. Trigger counter and trigger page should not be too
large.
If the external clock is used, the clock rate might be too low,
especially if the internal clock captures signals.
A large portion of the input signal is irrelevant and consumes memory.
Use the Enable function to set a specific signal condition that
triggers data capturing. In this way, you will not waste too much
memory for irrelevant data. See page57 for details.
A large amount of data (more than 32Mbit) is required.
Use the Data compression feature. It uses lossless compression
technique so there will be no data loss. See page42 for details.