I have found what I think is a software bug in the firmware for this generator.
When selecting 'NCyc' mode the interface allows up you to enter between 1 and 50000 for the number of cycles produced in each impulse train.
However, only values up to 255 appear to work, after 256 the number of cycles resets to 1 again. E.g. if I enter 256 I get 256 cycles. If I enter 257, I get 1 cycle again, 258 gives 2 cycles, 259 gives 3 etc. This looks like a bug to me - the cycle counter appears to be only 8-bits instead of 16!
Help please!