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RigExpert IT-24

Another  two  screenshots  demonstrate  the  ability  to  identify  signals  with  different 
levels, located at same or adjacent frequencies.

The following screen shots illustrate the interference from a microwave oven:

The Wi-Fi access point is still operating at the 1st channel (the center frequency is 
2412 MHz) in the “beacon” mode. The first screen shot is taken in a waterfall mode. 
You can see the moment when the microwave oven turns on, and see the frequencies 
of the interference. The second screen shot (a density graph) can help determine the 
difference  in  signal  levels.  Four  your  own  network,  choose  interference-free  areas: 
channels 5 or 6 and then 12 and up.

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Содержание IT-24

Страница 1: ...IT 24 RigExpert User s manual 2 4 GHz ISM Band Universal Tester...

Страница 2: ...easurement 4 3 Spectrum analyzer 4 3 1 Peak and average levels 4 3 2 Density graph 4 3 3 Waterfall 5 Computer connection 5 1 Screen shots 5 2 Firmware updates 6 Examples of use 6 1 SWR measurement of...

Страница 3: ...wer measurement of wireless access points and other transmitters RF environment monitoring in the spectrum analyzer mode IT 24 may be used by Telecommunication providers to check their own wireless da...

Страница 4: ...an 2 dBm Spectrum analyzer Display modes peak and average levels density graph waterfall Frequency range 2 3 2 6 GHz Bandwidth of sub bands 100 MHz 5 overlapping sub bands 20 MHz 30 overlapping sub ba...

Страница 5: ...pters recommended for this type of batteries Any leaks of electrolyte from the batteries may seriously damage the tester Remove batteries if the analyzer is not being used for a long time Store batter...

Страница 6: ...he main menu There is a power indicator in the top right corner of the Main menu screen The battery indicator shows battery discharge level When the battery voltage is too low this indicator starts fl...

Страница 7: ...ou may reset the tester to factory settings There is a test mode to quickly check several operating functions of the tester An SMA to RP SMA cable should be connected between the RF connector of the t...

Страница 8: ...time a simple calibration is required The following screen shot illustrates the return loss and SWR measurement mode The left and right keys change the operating frequency To hold the measurement pre...

Страница 9: ...four frequency sub bands may be chosen by pressing left or right keys watch the filled bar and the numbers at the bottom of the screen The OK button will hold the measurement displaying the H pictogr...

Страница 10: ...on the screen just disconnect your antenna from the RP SMA connector the calibration will then be done automatically In general it is sufficient to perform calibration only once after the tester is t...

Страница 11: ...splay a help screen for this operating mode 4 3 Spectrum analyzer There are three modes the RigExpert IT 24 can display spectrum of the input RF signal In each mode you may press the menu button to se...

Страница 12: ...ty graph In this mode color of each dot on the screen depends on how often the signal with a certain level is detected The color changes from blue rare to red often This mode may be used for monitorin...

Страница 13: ...each point corresponds to the certain level of the RF signal at a given frequency at the input of the tester Even small changes of the input signal are clearly visible since the data is collected on...

Страница 14: ...reen shots of the tester to the PC Press the screen shot key after running this program and the current screen will be sent to the LCD2Clip The image is automatically copied into the clipboard so you...

Страница 15: ...haves at different frequencies In the first case a simple antenna taken from a Wi Fi access point was measured see the screenshots below It can be easily seen that the minimum SWR about 1 3 is achieve...

Страница 16: ...cy range mostly having very high values more then 2 This indicates a poor quality of the antenna and or the cable In the third experiment see the screenshot below yet another antenna was connected to...

Страница 17: ...ong cable diameter approximately 5 mm was connected to the tester during the first experiment The measured SWR is under 1 3 in the whole range of 2 4 to 2 5 GHz which indicates a good quality of the c...

Страница 18: ...was 15 dBm Then a possible measurement error 2 dBm as well as a possible signal loss in the converter cable up to 1 dB were taken into the account As a result the actual output power could range from...

Страница 19: ...power levels as well as their distribution in frequency and time domain 6 4 1 The Wi Fi protocol There is no doubt that this communications protocol is of a great interest to analyze with the IT 24 Th...

Страница 20: ...screen shot in the middle This is because the OFDM modulation with 52 independent carriers is used The signal levels of all carriers are the same so the top of the picture becomes relatively flat The...

Страница 21: ...ated on the screen for a long time minutes and even hours This useful feature will let you see even those transmitters which were active for a short period of time only This will take into the account...

Страница 22: ...ccess point is still operating at the 1st channel the center frequency is 2412 MHz in the beacon mode The first screen shot is taken in a waterfall mode You can see the moment when the microwave oven...

Страница 23: ...are the signal levels of both base stations In addition it is clearly seen that each base station consists of several transmitters with different signal levels this may be segments of a single base st...

Страница 24: ...hot An access point is active at the 1st Wi Fi channel In addition signals with lower levels are visible at other frequencies The PC is now searching for Bluetooth devices Transmissions are clearly vi...

Страница 25: ...known in advance The tester was placed near the car alarm RFID transmitter receiver operating somewhere at 2 4 GHz A group of short signals appear at different frequencies periodically every 20 30 sec...

Страница 26: ...graph you can for instance compare the level of your signal and the level of interference Wi Fi access point at the 1st channel in this case Looking at the peak and average levels graph you may notice...

Страница 27: ...Rig Expert Ukraine Ltd Director Denis Nechitailov 29 March 2013...

Страница 28: ...Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates use...

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