GDS-200 & GDS-300 Series User Manual 
18 
Interface Panel 
Power input 
for options
Calibration 
output
Power 
switch
Internal use ports 
(restricted access)
USB device port
12V input port
 
 
Power switch to turn the unit on or 
off. 
DC input. This port is used for 
charging the internal lithium 
battery. Accepts power from the 
supplied AC-DC power adapter. 
 
Input Voltage: 10.5V - 13.5V 
Input Current: At least 3.5A. 
Mini-B USB device port. This port is 
used access the internal 120MB 
flash memory. When connected to a 
PC, the GDS-200/300 will be 
recognized as an external hard disk. 
The calibration port is used to 
output a 2Vpk-pk 1kHz square 
wave for probe calibration 
purposes. 
This panel houses two ports that are 
for internal use only. Use of these 
ports are restricted and not for end-
user use.