[Help] How to set up digital sources in Cadence?

Hi,

Signal sources include some periodical digital signals, like "10111100110101100000,10111100110101100000,10111100110101100000,......". Is there any way to set up a signal souce conviniently?

I tried the "vpwl" of analogLib, but my digital codes exceed 50. Can any one help me, please?

Thank you very much.