Tektronix PSM3000 Series, User Manual

Page: 23 / 76

Getting Started
Connect Multiple
Instruments
If you are connecting more than one instrument to a computer, use a USB hub.
The USB port or hub must supply more than 450 mA at 5 VDC for power
instrument operation. Read more about USB power requirements. (See page 1,
Computer, System, and USB Requirements .)
LED Indicator
There is a green LED located below the trigger out (TO) connector on the
instrument. This LED indicates instrument status as follows:
Dim green and steady: This shows power is being supplied to the instrument
but that the instrument has not yet been recognized by the computer.
Bright green and steady: This is the state for normal operation and shows that
power is being supplied to the instrument and that the instrument has been
recognized.
Bright green and blinking: This state shows that the instrument is not getting
enough current from the USB port. This usually means that the USB port
is not a high current USB 2.0 port.
Bright green and blinks a few times: This state is activated when you have
requested the software to identify the instrument. This is useful when you have
multiple instruments connected at once. (See page 10,
Start An Application .)
RF and Microwave Power Sensors/Meters 9