Config Spectrum Analyser SSA3032X  - Page 1
Forum section: electronics / beginners

author: zurczurc
author_rank: Newbie
timestamp: April 12, 2018, 04:45:20 pm
content: I'm new to this blog and my English is not very good.First I appreciate all for the help.I got a Spectrum Analyzer from my wife's Siglent.I'm having trouble setting up some thingsI need to set a central frequency of 433.783MHz Span 915MHzRBW 10KHz so far so good. I can not set Sweep Time for 11.07msI'm also having trouble setting RBW to 200KHz.Is there any place where I can configure the RBW and Sweep time step?In sweep time it is with steps of 24 ms and in RBW steps of 200KHz ....I can adjust sweep time when span equals Zero.I am very novice with a spectrum analyzer could help me thanks.Version:SW1 1.28.5aSW2 20170512-1SW3 0000000D1HW 07.03.00

author: w2aew
author_rank: Super Contributor
timestamp: April 12, 2018, 10:03:54 pm
content: Quote from: zurczurc on April 12, 2018, 04:45:20 pmI have never used the Siglent analyzer, but I will give you some general recommendations.First, please double-check your request. You stated you want a center frequency of 433.783MHz and a span of 915MHz. This doesn't make sense, because this would set the start frequency below 0Hz (433.783MHz -915/2 = -23.7MHz). So, double check your real requirement for center frequency and span.Most spectrum analyzers have an "Auto" mode which links some parameters together. For example, the RBW is typically linked to the Span setting. And, the Sweep Time is linked to the RBW. In most cases, you can turn off the "Auto" mode and manually set these parameters. It is common to manually set the RBW (unlink it from the Span). However, it is usually recommended to leave the sweep time in Auto mode - otherwise you can get an inaccurate result, especially if you make the sweep speed too fast for a given RBW setting.Also, many spectrum analyzers have a limited set of allowable RBW settings. Especially older analyzers that use "real" filters for the RBW. I am not sure if your unit has these limits.I hope this helps.

author: zurczurc
author_rank: Newbie
timestamp: April 13, 2018, 02:35:05 am
content: I took a look at the parameters and missed the drive the right is:Set up a central frequency of 100MHz MHz Span 2 MHzRBW 30KHz VBW 30KHz so far so good. I can not set Sweep Time for 50 msI'm also having trouble setting RBW to 200KHz.Is there any place where I can configure the RBW and Sweep time step?In sweep time it is with steps of 24 ms and in RBW steps of 200KHz ....I can only set the sweep time when span equals Zero.I am very novice with a spectrum analyzer could help me thanks.

author: Electro Fan
author_rank: Super Contributor
timestamp: April 13, 2018, 04:44:11 am
content: Pages 35-36 in the user manual talk about the sweep controls. I think it is possible to manually adjust the sweep time. In manual mode the analyzer will give an “uncal” indication if you ask for settings the analyzer thinks will compromise accuracy.The default is auto which will set the sweep based on span, RBW, VBW and maybe other parameters. There appear to be a couple versions of Auto - one that optimizes for sweep speed, another that optimizes for accuracy.In general, I think you will find the best approach is to stay in one of the Auto settings (speed or accuracy) and play with span, RBW, and VBW and let the analyzer set the sweep speed. If you want faster sweeps narrow the span and/or widen the BW settings. When you push the analyzer to longer spans and/or narrower BW it will slow the sweeps.

author: Electro Fan
author_rank: Super Contributor
timestamp: April 13, 2018, 07:05:07 pm
content: info on sweep settings

author: tautech
author_rank: Super Contributor
timestamp: April 13, 2018, 08:36:21 pm
content: It would seem the OP wants to check the transmit frequency of a wireless remote.I did and adjusted a 338 MHz remote just last week.Sweep settings are not too important for this but to get good resolution the Span setting is.If doing what he wants I'd set Start to 400 MHz and Stop to 470 MHz, use a Peak marker with its setting on Continuous and leave Sweep settings to the analyzer to decide what's best.Then activating the remote will give a constant peak frequency that adjustments can be made from.One needs to be aware both remote transmitters and receivers both drift so while thinking an adjustment of the transmitter back to the defined exact frequency will improve the systems performance this is not always the case.Some short time ago my 338 MHz remote would only work at very close range but by chance I adjusted it to get ~70m range but IT WAS NOT exactly on the prescribed frequency and I make the assumption the receiver frequency has also drifted. Both 20+ yr old remotes for this device have exhibited some drift and both have been adjusted to give better performance than new.

author: Bicurico
author_rank: Super Contributor
timestamp: April 13, 2018, 11:06:42 pm
content: It might be interesting to note that after finding the exact peak frequency of the remote transmission, on can set the span to 0 ("zero span") and "see" the individual bits being transmitted, much like on an oscilloscope.Regards,Vitor