"Traffic standby" on GRT HX screen

I have dual GRT HX and a Garmin 330 xpdr. The 330 has been dutifully providing traffic alert data. However, today I got a TRAFFIC STANDBY on the map screen and no traffic info.
I am assuming that somewhere I have pushed the wrong button and I can't discover what/where it is via the hardware docs. Does anyone have a clue as to what I can do to correct the problem?

thanks,
Don

OK, solved my own problem...

The GTX330 has a "standby" button. I had inadvertently pushed that and apparently it also puts Traffic in standby. Pushed the Altitude button and all is well.

Don

Thanks for the info. I will try to remember this, I'm sure I will do the same at some point.