TDP1000 and MS058B

Why does my scope show a probe bandwidth of only 650MHz with the TDP1000. The scope is 2GHz so it should show 1GHz??

I think you are thinking of the TPP1000. 
Looks like the amplifier in my TDP had a problem. It was stuck in 42v range. Still partially works but no 4.2v range. Need to check what the bandwidth actually is.