Question
What setting have to be made to get a trigger impules for every LTE 10 ms frame and how does the trigger looks like?
How to configure a external trigger at CMW500, CMW290, CMW270 to synchronize with LTE signal time frames
Answer
You can use the TrigA or TrigB port to get a trigger signal that is synchron with the LTE time frames.
Setup the in the "Trigger" user interface Direction = out, Source = LTE Sig1: Trame Trigger, Slope=RisingEdge. All posible trigger criterias are detailed described in the radio technologie user manuals e.g. LTE User Manual.
The trigger is very precise 10 millisconds and starts imediatley when the LTE Signaling Cell 1 is "on air" and sends out the first LTE frame.
The trigger impulse time is about 67 microseconds with 3.5V peak level - see screenshots below for TRIG A out "LTE Sig1: Frame Trigger
Position of TRIG A and TRIG B ports:
