This is for an upgrade for the 2-channel 9200 (9212) series pulse generator to a plus version 2-channel 9200+ (9212+) pulse generator. 
 
Upgrade Offers:
Delay and Width resolution improves from 10ns to 5ns
Rate resolution/accuracy improves from 10ns to 5ns
Increased rep rate goes from 5Mhz to 20Mhz
Additional system output mode for duty cycle number of cycle counts
Additional virtual channels (double existing)
System/pulse counter
Additional trigger input burst mode.
Additional trigger input duty cycle mode.
Synchronous Updating.
External trigger rate of 20MHz.
External trigger Re-Arm function