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.

I connected a TDP1000 to a MSO58B and I get 1 GHz bandwidth on both probe range (4.2 and 42 V).
I can't see 650 MHz in no condition.
Only selecting MSO58B lower vertical scale will necessarily limits the bandwidth to 250 MHz.