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Search found 137 matches

by w2aew
May 10th, 2020, 6:58 pm
Forum: RSA300/RSA500/RSA600 Series
Topic: RSA306 CISPR AVG and CISPR QPk detector issues on EMCVu
Replies: 5
Views: 136

Re: RSA306 CISPR AVG and CISPR QPk detector issues on EMCVu

This is normal behavior. The when using the CISPR detectors, the analyzer uses a 5MHz acquisition BW, vs the 40MHz BW used for the non-CISPR detectors. With the narrower acqBW, the instrument optimizes the IF gain/attenuation settings differently, achieving lower DANL in some frequency ranges. Also,...
by w2aew
May 10th, 2020, 6:41 pm
Forum: AWG5000/7000/70000 Series
Topic: AWG5202 Network lockdown
Replies: 1
Views: 99

Re: AWG5202 Network lockdown

The operating system on your AWG6202 can be either Windows 7 or Windows 10 - depending upon when it was ordered or if it was upgraded. If your unit is running Windows 7, there is an upgrade available to bring it to Windows 10. In either case, from a network security standpoint, you can basically app...
by w2aew
May 9th, 2020, 12:48 pm
Forum: Other or Discontinued Oscilloscopes
Topic: 466 AC Voltage Displayed On Screen Is Too High
Replies: 2
Views: 97

Re: 466 AC Voltage Displayed On Screen Is Too High

What are you using to base this measurement difference on? I would venture to guess that you have a signal or function generator, and you're setting a particular amplitude on that, and then measuring twice that amplitude on the scope. If that is the case, then there likely isn't any problem with the...
by w2aew
April 27th, 2020, 7:51 am
Forum: General Discussion
Topic: Phase measurement TDS2024C
Replies: 3
Views: 207

Re: Phase measurement TDS2024C

Looks like you have a spelling error.

'MEASUrement:INMed:SOURCE1 CH4'
'MEASUrement:INMed:SOURCE2 MATH

Should be:
'MEASUrement:IMMed:SOURCE1 CH4'
'MEASUrement:IMMed:SOURCE2 MATH'
by w2aew
April 27th, 2020, 6:05 am
Forum: General Discussion
Topic: Phase measurement TDS2024C
Replies: 3
Views: 207

Re: Phase measurement TDS2024C

This can be done. The MEASUrement:IMMed:TYPe PHAse command is available and documented in the programmers manual.
by w2aew
April 25th, 2020, 5:35 am
Forum: RSA300/RSA500/RSA600 Series
Topic: RSA306B DANL measurement
Replies: 3
Views: 126

Re: RSA306B DANL measurement

If you leave the display offset value (upper left corner) alone and don’t adjust it, then it will follow the adjustments you make to the Reference Level. Thus, the reference level will always be at the top of the Y scale as you expect.

73 de W2AEW
by w2aew
April 23rd, 2020, 6:40 am
Forum: RSA300/RSA500/RSA600 Series
Topic: RSA306B Noise floor linearization
Replies: 1
Views: 82

Re: RSA306B Noise floor linearization

Unfortunately no, it is a consequence of having a wide (40MHz) capture and analysis BW.
by w2aew
April 23rd, 2020, 6:39 am
Forum: RSA300/RSA500/RSA600 Series
Topic: RSA306B DANL measurement
Replies: 3
Views: 126

Re: RSA306B DANL measurement

There's nothing wrong with your analyzer, you just made one small mistake. The Reference Level is still set to 0dBm. Please note that the Reference Level is set using the Ref Lev numeric entry box in the Spectrum ribbon on the bottom of the display. It appears that you changed the vertical display o...
by w2aew
April 17th, 2020, 9:00 am
Forum: General Discussion
Topic: Vertical Resolution TBS1102B-EDU
Replies: 1
Views: 190

Re: Vertical Resolution TBS1102B-EDU

The readings you get on the scope ARE in volts. The 8-bit resolution that you see is just the resolution of the ADC (analog to digital converter) that is used to acquire the signal waveform. You won't have to do any conversion - the scope does it for you, and will give you results in volts.
by w2aew
April 10th, 2020, 12:52 pm
Forum: General Discussion
Topic: Oscilloscope Rise Time Selection
Replies: 5
Views: 302

Re: Oscilloscope Rise Time Selection

If you *know* the true risetime of the signal, you could approximate the scope risetime using: rise_scope = SQRT(rise_measured^2 - rise_actual^2) but this will suffer with accuracy if there is a big difference between the scope risetime and the actual risetime. If would be best to use a very fast pu...
by w2aew
April 10th, 2020, 11:40 am
Forum: General Discussion
Topic: Oscilloscope Rise Time Selection
Replies: 5
Views: 302

Re: Oscilloscope Rise Time Selection

In general yes, as this approximates a single-pole rolloff. However, keep in mind that with today's digital scopes, especially those with very high bandwidth, employ a lot of DSP to flatten the frequency response and often the rolloff is much steeper beyond the 3dB point. In these cases, the approxi...
by w2aew
April 10th, 2020, 6:11 am
Forum: General Discussion
Topic: Oscilloscope Rise Time Selection
Replies: 5
Views: 302

Re: Oscilloscope Rise Time Selection

The reason for the 5x rule is to ensure that the measured risetime is within 2% of the actual risetime. If the scope's risetime is too slow, it will slow down the measured risetime too much. The measured risetime can be approximated by the square root of the sum of the squares of the actual risetime...
by w2aew
April 6th, 2020, 6:47 am
Forum: General Discussion
Topic: Probes for Tektronix TAS465?
Replies: 1
Views: 175

Re: Probes for Tektronix TAS465?

You'll want to look for 10x passive probes. There are a LOT on the market. The ABC's of Probes will give you a lot of information. The probes that came with the scope were the P6109 but others such as P6105, P6106, etc. would be fine. You can often find these on the used market. Other manufacturer's...
by w2aew
March 31st, 2020, 12:14 pm
Forum: RSA300/RSA500/RSA600 Series
Topic: EVM at start of capture
Replies: 2
Views: 89

Re: EVM at start of capture

This could be the result of a few things. One possibility is that the device under test may have some instability or settling behavior at the beginning of the packet in terms of carrier frequency, symbol rate or modulation accuracy. SignalVu's detection algorithms determines a single carrier offset ...
by w2aew
March 2nd, 2020, 9:26 am
Forum: RSA300/RSA500/RSA600 Series
Topic: Recording with reduced bw?
Replies: 2
Views: 99

Re: Recording with reduced bw?

Streaming ADC samples using SignalVu-PC is limited to 40MHz BW only.

However, if you write your own streaming application using the RSA's API, you can stream narrower IQ BW data to disk. There are some examples in the following github:
https://github.com/tektronix/RSA_API
by w2aew
February 27th, 2020, 5:14 am
Forum: General Discussion
Topic: Signal analyser and spectrum analyser..?
Replies: 1
Views: 223

Re: Signal analyser and spectrum analyser..?

The terms "Spectrum Analyzer" and "Signal Analyzer" are often used interchangeably, but there is a difference. A Spectrum Analyzer is an instrument that primarily makes measurements of the spectral or frequency domain content of a signal - basically spectrum traces. It can also make a number of meas...
by w2aew
February 21st, 2020, 12:42 pm
Forum: Windows Based Oscilloscopes
Topic: spectrum analyzer
Replies: 1
Views: 123

Re: spectrum analyzer

The MSO72004C can be equipped with an RF Spectrum and Signal Analysis package called SignalVu. In fact, your scope probably has a trial version of it already loaded. This can easily be used to perform this analysis. Look under the Analysis menu..
by w2aew
February 18th, 2020, 4:33 pm
Forum: RSA300/RSA500/RSA600 Series
Topic: Recommendations for use of the internal attenuator
Replies: 1
Views: 129

Re: Recommendations for use of the internal attenuator

In general, the best recommendation is to keep the attenuator in "Auto" mode. With this setting, the attenuator value is determined automatically the Reference Level and Preamp status. The goal of proper attenuator setting is to ensure that the signal level that is applied to the first mixer is with...
by w2aew
February 16th, 2020, 7:54 pm
Forum: General Discussion
Topic: TTR500 Measurement Calibration
Replies: 1
Views: 223

Re: TTR500 Measurement Calibration

With the TTR500 series VNA, as long as you're staying within the start/stop frequencies that you've calibrated over, the unit will interpolate the calibration results across your new set of measurement points. Of course, it is always recommended that you re-calibrate to get the best possible amp/pha...
by w2aew
February 3rd, 2020, 6:38 pm
Forum: RSA300/RSA500/RSA600 Series
Topic: SignalVu Not Reporting RSA Calibration Data Version
Replies: 1
Views: 126

Re: SignalVu Not Reporting RSA Calibration Data Version

Thank you for reporting this issue. We have submitted a report to the software team responsible for SignalVu-PC.

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