Synthesizer part selection

We are looking for programmable synthesizer with an operating range of 1-6GHz, below mentioned are the specification:

1.Waveform: SFCW (Stepped Frequency Continuous Wave)

2.Step size: 5 MHz

3.No. of steps: 200

4.Sweep period: 20 ms (4 ms gap between successive sweeps)

5.Time period for each step: 100 us

Please suggest any part which will meet the following specification