| Products > Test Equipment |
| Upcoming Rigol DSG815/830 |
| << < (17/18) > >> |
| kj7e:
I suspect pins 5/7 are VCC for the oven and clock operation, pin 8 I suspect is voltage error correction from a DAC output to net the OCXO calibration. |
| chicken:
--- Quote from: kj7e on December 28, 2023, 03:56:42 pm ---I suspect pins 5/7 are VCC for the oven and clock operation, pin 8 I suspect is voltage error correction from a DAC output to net the OCXO calibration. --- End quote --- Pins 5/7 and 8 on the edge connector are joined by the three vias. Also, based on the datasheet, I don't think the OCXO that Rigol uses has a separate pin for the control voltage. If I were to build my own option, I'd probably go with a different OCXO that has a dedicated pin for the control voltage, and then use a voltage divider from VCC with a multi-turn trimpot to adjust the control voltage. |
| kj7e:
Extended output sweep from the DGS821, 1.000 - 3.200 GHz, the cal is good up through the stock 2.1 GHz range (up to 2.35 GHz), but falls off in the newly liberated extended range. Note, I calibrated out the cable with another known flat generator. |
| kj7e:
--- Quote from: chicken on December 27, 2023, 07:45:38 pm --- --- Quote from: kj7e on December 27, 2023, 06:36:15 pm --- --- Quote from: chicken on March 25, 2022, 07:11:43 pm --- --- Quote from: Houseman on March 25, 2022, 12:15:23 pm ---Rigol officially claims that the OXCO module has to be inserted at factory by them even after since after plugging the expansion in all RF gen needs to be whole recalibrated again... --- End quote --- Dooh! :( --- End quote --- Its not that the entire unit needs calibration, its just the OCXO will need to be calibrated once its in the unit, otherwise it will be very stably off frequency. --- End quote --- Hmm, I guess the 6.5V observed on the VCC pin will then be adjusted by the DSG to tune the OCXO. From the datasheet of the OCXO used on the option for the DSG3000: https://www.dptel.com/Products/ProductLevel4/2899 (highlighted 5 is the option based on part-number O22B-G445) Not sure how to interpret that table. +/- 2.5V from nominal 5V supply voltage? --- End quote --- I was finally able to view the page from home (work blocked it). The chart is referring to the ordering part number code for the Voltage Control Characteristics or how much error correction range there is. The thing that's throwing me, they dont show a VEC pin? They show in table 2 you can specify 3.3, 5 or 12v VCC and that's pin 5, ground on pin 2, output on pin 1, so either pin 3 or 4 should be VEC. |
| GarbageCan:
I have a DSG815 and my life would be a lot easier if I had just 150MHz more bandwidth. It looks like people have done some impressive work in this thread, and I'm hoping to try and make my signal generator look a bit more like a DSG836. This is a bit outside my realm, so apologies if this seems obvious. But is the procedure essentially: 1) Follow Reply #49 instructions on how to use a USB to enter factory mode 2) From Reply #50 use the linked license generator with option AAAB and the private key found (in reply #61 or if you break with the public key) along with your own serial number. 3) Insert this generated key using the SCPI command :SYSTem:LKEY Is that all? I wasn't sure if the riglol option of AAAB/AAAC unlock the 3.6GHz or if that is some separate SCPI command. Just trying to wrap my head around what's necessary before I dive into it. Thanks! |
| Navigation |
| Message Index |
| Next page |
| Previous page |