I Upgraded my DG4062 to a DG4202 (200 MHz), but . . .
Issue 1. What I’m seeing is that the sine wave output is flat to 100MHz within +/- ~ 0.4 dB to 100MHz, but about -1 dB @ 120MHz, ~ -2.5 dB @ 160MHz, and ~ -4.5dB @ 200MHz. The Square Wave Rise Time is about 4.1 ns, so I’m happy about that, as I believe that the extrapolated spec would be 5ns for the DG4202. But the Sine Wave level drop above 100MHz seems way out of the ordinary with the Flatness spec for the DG4162 being +/- 0.8 up to 160 MHz. Test configuration: I have the DG4000 output impedance set for 50 Ohms, used output levels of 0 and -15dBm (with the same results), and the output measurements were made with a Spectrum Analyzer and a HP RF Power Meter.
Issue 2. I also have an issue with DG4000 Screen Saver after several minutes of no activity (not making any changes on the front panel). The DS4000 comes up with a dark screen and a Rigol logo that changes position on the screen every 5 seconds, or comes up with Rigol in a single fixed position, or comes up with a blank screen. I didn’t notice this behavior before. Hopefully this issue is simply in the version 00.01.06.00.02 of software/firmware and others with/without this upgrade patch are experiencing this also (?).
System Info: Device Model - DG4062/DG4202, Serial Number - DG4D152xxxxxx, Software - 00.01.06.00.02, FPGA - 00.01.07.09, Hard - 01.03, Keyboard - 05.01, and Enc FPGA – 06.
I was able to successfully recovery the original DG4062 configuration by using the ‘cegen’ Keygen in reverse (DG4202 to DG4062).
The Screen Saver operation is the same. And by the way it kicks in after 15 minutes of no front panel activity. Out of 8 tests the Rigol Logo froze twice. So does this mean it is due to a firmware bug and was there before using ‘cengen’? Probably. . . Has this issue been reported by anyone else?
Please, any thoughts or comments would be appreciated.