My pleasure

Glad it helps!

Will try :)

Glad it was helpful!

@sharanpalsingh5619 i did a quick check on the FieldFox and also its manual and there's no way for user to import/export the Mask (abs or relative) information from FieldFox. You might want to talk to Keysight's local contact about this.

@@autumngreentech4726 Thank you for your quick reply. Will reach out to support team

i found this application note which might help to answer your questions. www.keysight.com/us/en/assets/7018-06829/application-notes/5952-3706.pdf

@@autumngreentech4726 Thank you Sir , you always reply to my questions and guide me so well .

There are few limitation on FieldFox which might need more steps in setting up. in detail you can check on this link to get a better understanding on the whole EMI option on FieldFox www.keysight.com/us/en/assets/3121-1386/solution-briefs/FieldFox-All-in-One-Pre-Compliance-EMI-Analyzer.pdf Based on this, we dont have specification on MIL 461 E, but as long as you are able to set the right RBW, delay, number of sweep points...etc. you should be able to test out EMI. Bear in mind that this is a pre-compliance system, you will still need to go to proper EMI test company to get the certification.

when you mentioned the loss of -4dB, is it when you have a thru connector between port 1 and 2? or it's the ECal? then when you are using mechanical cal kit, were you using the same thru adaptor that you used during the calibration? i will suggest to contact the local Keysight Care team for this as they are able to guide you thru.

@@autumngreentech4726 i mean when it is Ecal kit between port 1 and port 2 . After completing the full 2 port calibration, I observed a -4dB loss at S21 measurement . This occurred after calibration when i checked after last calibaration step and ECAl kit is connected the s21 it was -4dB .

I"m checking with someone from Keysight right now. Meanwhile is always good to talk to your local Keysight's folks about this.

i found this somewhere in the web. "The Physical Cell Identity (PCI) in 5G New Radio (NR) is represented by the Primary and Secondary Synchronization Signals (PSS and SSS) within the Synchronization Signal Block (SSB)1. The PCI is unique to each cell and is used by user equipment (UE) to identify and synchronize with a specific cell1. In the case of multiple cells (each with a unique PCI), each cell would transmit its own SSB. Therefore, two different PCIs would not reside within the same SSB. Instead, each PCI would have its own corresponding SSB1. This is because the positions of the Demodulation Reference Signals (DM-RS) across the PBCH are determined by the PCI1. So, to answer your question, two PCIs cannot reside within the same SSB. Each SSB is associated with a unique PCI, and each cell transmits its own SSB1. This ensures that UEs can correctly identify and synchronize with the appropriate cell." With that, i will think that FieldFox actually scan thru the spectrum. There's a part where user can set the search bandwidth and this is where FieldFox tries to decode the information for all the SSB channel that it found while doing the scan. Hence the long delay for the result to be displayed on the screen. Hope this answers your question.

@@autumngreentech4726 Could you please look at 4:07 once you have populated the results in the scan table? cell0 pci 258 0 86 frequency is 3.606 GHz cell1 pci 803 2 267 frequency is 3.606 GHz Seems like the frequency is the same, correct ?

that's a great observation! 3.606GHz is the carrier signal with about 100MHz of bandwidth and within the same bandwidth there are multiple SSB channels. here is the summary for SSB information and how different channels can be fitted within the 100MHz bandwidth. "In 5G NR (New Radio), the spacing between Synchronization Signal Blocks (SSBs) with different Physical Cell Identifiers (PCIs) depends on several factors, including the carrier frequency and the subcarrier spacing used. The SSB frequency raster and its spacing are defined by the 3GPP standards. Here is an overview: SSB Frequency Raster The SSB frequency raster is the set of frequencies where SSBs can be placed. The placement of SSBs within a given carrier bandwidth follows a defined raster that is determined by the subcarrier spacing (SCS). The SSB raster spacing is as follows: 15 kHz SCS: SSBs are spaced by 240 kHz 30 kHz SCS: SSBs are spaced by 480 kHz 60 kHz SCS: SSBs are spaced by 960 kHz 120 kHz SCS: SSBs are spaced by 1.92 MHz Frequency Range The exact placement of SSBs also depends on the frequency range (FR) in use: FR1 (Sub-6 GHz): SSBs typically use a 30 kHz SCS or 15 kHz SCS, depending on the specific band. FR2 (mmWave): SSBs use a 120 kHz SCS or 240 kHz SCS. Multiple SSBs and PCIs In practice, multiple SSBs can be transmitted within the same carrier, especially in the case of beamforming where different beams cover different spatial directions. Each SSB carries a different PCI. Example Calculation For an SSB with 30 kHz SCS in FR1: SSBs would be spaced 480 kHz apart. If there are multiple SSBs within a carrier, each would be placed at a multiple of 480 kHz from a reference frequency. By adhering to these spacing guidelines, the network can ensure proper decoding and synchronization of SSBs by user equipment (UE), enabling the detection and connection to the correct cell and PCI."

on the Sub Carrier Spacing (SCS): "The bandwidth of a Synchronization Signal Block (SSB) in 5G NR is determined by the subcarrier spacing (SCS) used. The nominal bandwidth for an SSB consists of the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Physical Broadcast Channel (PBCH). Here's a detailed breakdown: Subcarrier Spacing (SCS) and Bandwidth The 5G NR standard defines different SCS values, and each affects the total bandwidth of an SSB: 1. 15 kHz SCS: SSB occupies 4 Resource Blocks (RBs). Each RB has 12 subcarriers. Total bandwidth: 4 RBs×12 subcarriers×15 kHz=720 kHz. 2. 30 kHz SCS: SSB occupies 4 RBs. Each RB has 12 subcarriers. Total bandwidth: 4 RBs×12 subcarriers×30 kHz=1.44 MHz. 3. 60 kHz SCS: SSB occupies 4 RBs. Each RB has 12 subcarriers. Total bandwidth: 4 RBs×12 subcarriers×60 kHz=2.88 MHz. 4. 120 kHz SCS (used in FR2 or mmWave frequencies): SSB occupies 4 RBs. Each RB has 12 subcarriers. Total bandwidth: 4 RBs×12 subcarriers×120 kHz=5.76 MHz. Summary 15 kHz SCS: 720 kHz 30 kHz SCS: 1.44 MHz 60 kHz SCS: 2.88 MHz 120 kHz SCS: 5.76 MHz These bandwidth values ensure that the synchronization signals and broadcast information within an SSB can be properly transmitted and received by user equipment (UE)."

@@autumngreentech4726 Hi again, thanks for the detailed explanation. What about 4G LTE FDD or TDD? If I'm not wrong, FF can decode several PCI simultaneously, but my confusion is that in 4G SSB is always centralized on carrier frequency (in 5G it could be shifted within total channel BW as you explained) If I'm correct, FF can decode two different PCIs even if PCIs are on the same carrier frequency in 4G?

where did you find the price tag?

cheers!

thanks mate! I'll try my best for the indoor map video as soon as i have another break in between project.

the indoor map hasn't changed since this video was recorded. I'm with you on the different color for the dots to represent different signal level. I've talked to someone in Keysight on this and hope there's a new update on this indoor map soon. Glad it helps. Cheers.

cheers!

it's a high gain low input amplifier I've gotten from eBay. Gain is about 48dB at 1.5GHz and Frequency range is between 1MHz to 2GHz. Input power <-54dBm, input voltage 12V and working currrent about 70mA you can find similar thing here www.ebay.com.au/itm/294642912964?var=593113070149

thanks for your support! when you click on "Export Sequence" in Keysight's command Expert, you get the option to either "Copy to Clipboard" or "Save to File". Copy to clipboard will enable you to paste it to your existing code, while save to file will enable you to have these code in one file. You will have to have python installed and also "pyvisa" library prior to executing these code. I'm sure you have done this, but for the sake of others, to install pyvisa after Python is installed, you will have to run CMD in your computer, then type in "python - m pip install pyvisa" without the quotes. hope i answered your question. :)

You're welcome 😊 glad it helps

thanks!

i'll have to spend some time on this. Meanwhile, you can contact the local Keysight Sales or KeysightCare team for this issue that you are seeing. :)

Thanks. Please share if you find something 😊

@@jalla279 I found this online, not sure whether it'll help you with the differential measurement www.keysight.com/us/en/assets/7018-03037/application-notes/5990-8443.pdf

Glad it helped

i lost all the original code. one way to get this sample code is thru the AI code generator. What you can do it try typing in "python code controlling FieldFox using pyvisa"

wanted to, but am not in the position to sell anything :(

This is their website. tmytek.com/ The unit that i used in this demo is BBox GoField. should be able to find the spec in their website. Best is to contact them directly.

Glad it was helpful!

Just press the button "9 Save/Recall" and then "More" on the softkey and it will lead you to the manage file selection

@@autumngreentech4726 I got it. Thank you so much.

@@bluemoon9868 no problem!

:)

Glad to hear that!

Thank you! Will do!

Thanks!

it sure is

Glad it was helpful!

Ok I will try