I want to generate a 5 kHz microwave pulse to induce a sample signal. This microwave pulse has an underlying microwave frequency of 2 GHz. In order to investigate very tiny signals, which should arise within my setup with a frequency of 5 kHz repetition, I want to use a lock in amplifier to differentiate my 5 kHz signals from the noise floor.
Currently I have a Hewlett Packard 83640B signal generator 10 MHz-40 GHz and a Zurich Instruments lock in amplifier HF2LI.
Can I use the lock in for generating the 5 kHz reference signal, put it in the signal generator which is then modulated with 5 kHz and generates a 2 GHz signal by its own which is sent to a microwave antenna?
The detection signal of my sample is of course used as input for the lockin, it compares the input signal to its internal reference of 5 kHz, and shows me how big my sample signal is.
Is this possible? Which obstacles do I need to handle? Is there another way if this setup wont work?
I am no physicist and no engineer, please keep your comments rather simple if you have a tip or good advice.