I want to measure the TX PLL switching time when it is hopping between two frequencies?
Can you please tell me how to measure the locking time of PLL?
You need to observe the Tx output in the time domain and measure the time it takes to switch from one frequency to another frequency.
We use Agilent test equipment that performs RF Transient measurement. Depending on the size of the frequency jump we use NB or WB measurement options. The end result is a plot of frequency vs time where we can read off the switching time within certain settling accuracy.
We use Agilent test equipment that performs RF Transient measurement. Depending on the size of the frequency jump we use NB or WB measurement options.
Thanks for your reply.
In my application i am hopping frequencies between 301 MHz and 311 MHz. I want to measure the LO switching time in FDD and TDD mode.
Can you please explicate clearly how to measure?
Please help me to measure this and i'm using Agilent N9020A spectrum analyzer.
Please contact Agilent applications on how to perform RF Transient measurement using N9020A.
Please tell me how to measure PLL switching time?
I am operating device in TDD mode, I am hopping the frequencies between 350 MHz and 500 MHz. Normally what is the frequency settling time takes between these frequencies.
And please tell how to measure the time? At which point we need to measure the time whether CTRL_OUT pins or TX output port?
Please guide me to measure time as early as possible, because i dont have time to extend for this furthermore.
Thanks in advance.
Can you please tell the equipment which you used for measuring this Switching time?
We use Agilent PXA series signal analyzers and accompanying software.
The best equipment to measure the lock time is E5052B signal source analyzer from Agilent. But it is an expensive piece of equipment and not everybody has access to an E5052B. You may also use a high sampling rate oscilloscope to directly digitize the TX ouput and see the phase locking action in time domain.
Hi Thanks 0dBc,
I will try to measure with high sampling rate oscilloscope
Retrieving data ...