SAF Spectrum Compact Step-By-Step Manual Download Page 53

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Summary of Contents for Spectrum Compact

Page 1: ...Spectrum Compact 2 40 GHz STEP BY STEP GUIDE ...

Page 2: ...ta for site planning purposes The built in LCD touchscreen ensures smooth and intuitive use of the spectrum analyzer which can be connected directly to any standard flange antenna via an SMA connector The industry leading sensitivity of Spectrum Compact makes it possible to detect existing interference paths and available radio channels with extra high precision which also helps avoiding alignment...

Page 3: ...ters UBR to SMA z z UBR84 to SMA 6 6 10 GHz WR112 z z UBR100 to SMA 8 2 12 GHz WR90 z z UBR140 to SMA 12 17 GHz WR62 z z UBR220 to SMA 17 24 3 GHz WR42 z z UBR260 to 2 92 22 33 GHz WR34 z z UBR320 to 2 92 26 40 GHz WR28 Lanyard Additional accessories Riflescope tripod and case for sniffer antennas Attenuator kit 20 60dB Handheld horn antennas z z 6 0 10 0 GHz Gain 14 5 18 0dBi SMA connector z z 10...

Page 4: ...and status 13 Spectrum Compact Applications Radio link passive repeater installation 17 Transmitter verification 18 Antenna alignment 19 Antenna alignment fine tuning 21 Antenna polarization adjustment 22 Replacement of an already installed antenna decreasing the network downtime 24 Spectrum Compact Applications Commissioning from ground level 27 Status verification of an installed microwave radio...

Page 5: ...nd radio configuration 34 Verification of antenna alignment and LoS 35 Verification of antenna alignment using reference antenna 37 Interference detection 39 Multipath detection 43 Annex 45 Power ratio and decibel conversion table 46 A simplified formula for path calculation 46 ...

Page 6: ...SHORT GUIDE TO USING SPECTRUM COMPACT ...

Page 7: ...screen has the following configuration buttons SWEEP CONT start or stop the sweeping of spectrum the button is green when spectrum is being swept continuously and grey if the sweeping is stopped SAVE save the current spectrum curve for later review FREQUENCY select the centre start and stop frequencies SPAN change the displayed frequency range difference between the start and stop frequencies MARK...

Page 8: ...ed PRESET reset the device to factory settings use this if you don t know how to turn off change a setting FILES save the current spectrum curve and access previously saved spectrum curves RECORD this function continuously records every scan performed for later analysis ABOUT access information about Spectrum Compact supported frequency range serial number firmware version etc POWER IN BAND set up...

Page 9: ...dition to managing firmware updates Spectrum Manager can be used in both real time together with a Spectrum Compact device and offline modes and provides you with a variety of functions such as PiB Power in Band overlay and min max hold To download Spectrum Manager follow these steps 1 Log in in saftehnika com 2 In Products menu select Spectrum Compact or V band and E band Spectrum Compact 3 In Do...

Page 10: ...5 EQUIPMENT GENERAL INSTRUCTIONS ...

Page 11: ...6 Signal Generator Spectrum Compact ...

Page 12: ...7 Coaxial cable Waveguide adapter Attenuators ...

Page 13: ...8 In this position the waveguide adapter detects horizontal polarization In this position the waveguide adapter detects vertical polarization ...

Page 14: ...9 SPECTRUM COMPACT APPLICATIONS SITE SURVEY ...

Page 15: ...e to be used as a reference point for when you are up in the tower 3 Climb the tower 4 Install the antenna at the chosen height and polarization 5 Set the horizontal direction of the antenna according to your previously chosen reference point 6 Adjust the vertical angle of antenna to be 90 relative to the ground preferably using a spirit level tool 7 Connect Signal Generator to the antenna 8 Turn ...

Page 16: ...n HOME 16 Tap SPAN then MIN SPAN to set the span to minimum Tap HOME Note for wider bands 80 MHz and up tap SPAN and using the keypad select a wider span 17 Tap TRACE MODE then select either AVERAGE 2 or AVERAGE 4 Tap HOME If the calculated target received signal strength is below 80 dBm zoom in on the power axis for better visualization tap TOOLS tap LEVEL then MAX and using the keypad select the...

Page 17: ... the Spectrum Compact 5 Point the antenna waveguide adapter in the chosen direction 6 Tap SPAN then FULL SPAN Tap HOME 7 Tap SWEEP CONT only if the button is grey 8 Check for OVERLOAD a If there is an indication above the graph remove SC from the antenna and add attenuators b If there is no indication above the graph proceed with the next steps 9 Tap FREQUENCY then START and using the keypad enter...

Page 18: ...e grey POWER IN BAND area as a ruler 17 Tap BACK twice then select the file with the spectrum curve taken in the opposite polarisation Check for interference Confirmation of dedicated radio channel availability and status Equipment SC handheld horn antenna 2 92mm cable compass waveguide adapter optional 1 A reasonable distance away from the tower use a compass to find the right azimuth angle and l...

Page 19: ...ng the keypad enter the desired radio frequency in MHz Tap ENTER then HOME 12 Tap SPAN using the keypad enter the span 200 MHz Tap ENTER then HOME 13 Tap POWER IN BAND then BW and using the keypad select the channel bandwidth that was assigned to you Tap ENTER Tap SET TO CENTRE Tap HOME 14 Tap SWEEP CONT if the button is grey 15 Tap SAVE for future reference 16 Check both polarizations 17 After ch...

Page 20: ... 22 Examine the spectrum curves on Spectrum Compact All saved spectrum files must be free of any signals within the dedicated frequency channel Furthermore both adjacent in the same bandwidth in both directions channels should also be clear If there are any signals located in adjacent channels you have to ensure that this will not cause an interference problem ...

Page 21: ...16 ...

Page 22: ...17 SPECTRUM COMPACT APPLICATIONS RADIO LINK PASSIVE REPEATER INSTALLATION ...

Page 23: ... 6 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency set on the radio in MHz Tap ENTER then HOME 7 Tap SPAN then MIN SPAN Tap HOME Note for wider radio channel bandwidths 80 MHz and up tap SPAN and using the keypad select a wider span e g 120 Tap ENTER Tap HOME 8 If the radio is transmitting in the selected frequency you should be able to see the sig...

Page 24: ...e distance away from the tower use a compass to find the right azimuth angle and look for something in the environment in that direction to be used as a reference point for when you re up in the tower 3 Climb the tower 4 Install the antenna at a chosen height and polarization 5 Set the horizontal direction of the antenna according to your previously chosen reference point 6 Adjust the vertical ang...

Page 25: ...hen CENTRE and using the keypad select the frequency equal to the centre frequency set on the transmitter in MHz Tap ENTER then HOME 15 Tap SPAN then MIN SPAN Tap HOME Note for wider radio channel bandwidths 80 MHz and up tap SPAN and using the keypad select a wider span e g 120 Tap ENTER Tap HOME 16 Tap TRACE MODE then either AVERAGE 2 or AVERAGE 4 Tap HOME If the calculated target received signa...

Page 26: ... The most common mistake during alignment is aligning to a side lobe Thus it is important to sweep all the way through before fixing the antenna position 6 Now sweep the range once more while simultaneously comparing the two traces shown on the screen of Spectrum Compact 7 Fix the position on the Spectrum Compact site when the NORMAL trace more or less matches the blue MAXHOLD trace i e when the c...

Page 27: ...enna precisely 12 Tap HOME and SPAN 13 In SPAN menu tap SPAN window and using keypad select 3 times wider SPAN than your dedicated channel It will show you the situation in adjacent channels 14 Tap SAVE for future reference Antenna polarization adjustment 1 Connect Spectrum Compact to the antenna Use appropriate attenuation see General instructions 2 Turn on Spectrum Compact 3 Tap SPAN then FULL S...

Page 28: ... the power axis for better visualization tap TOOLS tap LEVEL then MAX and using the keypad select e g 70 Tap ENTER then HOME 9 Tap SWEEP CONT if the button is grey 10 Before making any adjustments mark the current position of the feeder 11 Loosen the screws enough to allow movement of the feeder 12 Adjust the feeder clockwise or anti clockwise while simultaneously comparing the two traces shown on...

Page 29: ... indication above the graph proceed with the next steps 7 Tap LEVEL then OFFSET and using the keypad select the attenuation value used Tap ENTER then HOME 8 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency set on the transmitter in MHz Tap ENTER then HOME 9 Tap SPAN then MIN SPAN Tap HOME Note for wider radio channel bandwidths 80 MHz and up tap SPA...

Page 30: ...he range once more while simultaneously comparing the two traces shown on the screen of Spectrum Compact 17 Fix the position when the NORMAL trace matches the blue MAXHOLD trace i e when the currently received signal level is the highest possible When the horizontal fine alignment is completed align the antenna vertically in the same manner steps 14 17 18 Tap TRACE MODE then either AVERAGE 2 or AV...

Page 31: ...ated value the antenna alignment is correct If the measured value is lower mark the current antenna position and proceed with antenna alignment fine tuning Adjust the antennas on both sites 23 Remove the Spectrum Compact and hot swap the radio to the new antenna ...

Page 32: ...27 SPECTRUM COMPACT APPLICATIONS COMMISSIONING FROM GROUND LEVEL ...

Page 33: ... radio in MHz Tap ENTER then HOME 5 Tap SPAN then MIN SPAN Tap HOME Note for wider radio channel bandwidths 80 MHz and up tap SPAN and using the keypad select a wider span e g 120 Tap ENTER Tap HOME 6 Tap SWEEP CONT if the button is grey 7 Direct the handheld antenna towards the antenna of interest at about 45 degree angle Note Antennas have prominent side lobes from 30 60 degrees The further you ...

Page 34: ...dheld antenna 1 Connect Spectrum Compact to the waveguide adapter via SMA cable 2 Move away from the tower to approximately a distance equal to the antenna height AGL Above Ground Level 3 Turn on Spectrum Compact 4 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency of the radio in MHz Tap ENTER then HOME 5 Tap SPAN then MIN SPAN Tap HOME Note for wide...

Page 35: ...ation 12 Tap SAVE 13 Compare the measurement for the vertical polarization the yellow mask curve and the horizontal polarization the white trace The highest signal corresponds to the polarization of the antenna Please note if the signal was not detected from ground level it may not necessarily mean that the transmitter is not working It may be necessary to get alongside the antenna at the remote s...

Page 36: ...31 SPECTRUM COMPACT APPLICATIONS BASIC TROUBLE SHOOTING ...

Page 37: ...iver Line of Sight problems See Commissioning from ground level Verifying the radio configuration Verification of antenna alignment and LoS Interference and multipath detection Transmitter verification Problem good RX level but bad signal to noise ratio MSE bad constellation diagram Possible causes misconfigured radio s interference damaged transmitter damaged receiver See Commissioning from groun...

Page 38: ... Transmitter verification Problem scanned spectrum curve is with spikes Possible causes external interference damaged transmitter See Commissioning from ground level Verifying the radio configuration Verification of antenna alignment and LoS Interference and multipath detection Transmitter verification This guide does not provide insight beyond the previously mentioned problems and if none of the ...

Page 39: ...ect a wider span e g 120 Tap ENTER Tap HOME 6 Tap TRACE MODE then AVERAGE 4 to reduce noise effects Tap HOME 7 Tap SWEEP CONT if the button is grey 8 Place the waveguide adapter next to the antenna 9 The spectrum curve should appear on the screen of Spectrum Compact indicating that the radio is transmitting 10 Turn the flange to a horizontal position and aim at the remote site to check the vertica...

Page 40: ...esn t exactly match the marked grey area it means that the actual radio channel frequency and or bandwidth doesn t correspond with the license 19 Tap SAVE for further analysis and future reference Verification of antenna alignment and LoS With link interruption 1 Climb the tower 2 Remove the radio from the antenna 3 Check whether the antenna and the radio is installed in the correct polarization 4...

Page 41: ... then BW and using the keypad select the bandwidth equal to the channel width set on the radio Tap ENTER Tap SET TO CENTRE Tap HOME 13 Tap SWEEP CONT if the button is grey 14 If the transmitter is working and the LoS between the two sites is clear signal trace should appear at the centre of the graph now If the calculated target received signal strength is below 80 dBm zoom in on the power axis fo...

Page 42: ... interruption 1 Climb the tower 2 Install reference antenna close as possible to the antenna under the question 3 Connect Spectrum Compact to the reference antenna Use appropriate attenuation see General instructions 4 Turn on Spectrum Compact 5 Tap SPAN then FULL SPAN 6 Check for OVERLOAD a If there is an indication above the graph remove Spectrum Compact from the antenna and add attenuators b If...

Page 43: ...obe Thus it is important to sweep all the way through before fixing the antenna position 14 Now sweep the range once more while simultaneously comparing the two traces shown on the screen of Spectrum Compact 15 Fix the position on the Spectrum Compact site when the NORMAL trace more or less matches the blue MAXHOLD trace i e when the currently received signal level is the highest possible 16 Align...

Page 44: ...tial interference detection without traffic interruption 1 Connect Spectrum Compact to the waveguide adapter via SMA cable 2 Get alongside the antenna 3 Turn on the Spectrum Compact 4 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency of the remote radio in MHz Tap ENTER then HOME 5 Tap SPAN using the keypad select the span 200 MHz Tap ENTER then HOME...

Page 45: ...o a vertical position and aim at directly the opposite direction the antenna is facing to check for horizontal polarization interference in back of the antenna 19 Tap SAVE to save the spectrum curve for further analysis and future reference 20 Tap TOOLS then FILES Tap VIEW Use é and ê to navigate the file list 21 Examine the spectrum curves on Spectrum Compact The spectrum taken alongside the ante...

Page 46: ... from the antenna and add attenuators b If there is no indication above the graph proceed with the next steps 6 Tap LEVEL then OFFSET and using the keypad select the attenuation value used Tap ENTER then HOME 7 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency set on the transmitter in MHz Tap ENTER then HOME 8 Tap SPAN using the keypad select the sp...

Page 47: ...indication above the graph remove Spectrum Compact from the antenna and add attenuators b If there is no indication above the graph proceed with the next steps 6 Tap LEVEL then OFFSET and using the keypad select the attenuation value used Tap ENTER then HOME 7 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency set on the transmitter in MHz Tap ENTER t...

Page 48: ... attenuation see General instructions 4 Turn on Spectrum Compact 5 Tap SPAN then FULL SPAN 6 Check for OVERLOAD a If there is an indication above the graph remove Spectrum Compact from the antenna and add attenuators b If there is no indication above the graph proceed with the next steps 7 Tap FREQUENCY then CENTRE and using the keypad select the frequency equal to the centre frequency set on the ...

Page 49: ...sis and future reference 13 Examine the spectrum curve Under good conditions the detected points should make up an even spectrum curve If the curve is filled of spectrum points in larger amplitude and does not make a clear curve line then it could point to a multipath issue Note It is advised to determine the time when the fluctuations happen and investigate at that time of the day week etc ...

Page 50: ...45 ANNEX ...

Page 51: ... 2 gain losses For distance in miles RX TX 36 6 20 x log10 frequency MHz 20 x log10 distance mi distance mi x const dB mi antenna 1 gain antenna 2 gain losses select the constant from the table on the next page depending on the frequency in question waveguide or cable losses power ratio difference in dB equal 0 twice 3 3 times 5 4 times 6 5 times 7 6 or 7 times 8 8 times 9 9 or 10 times 10 differe...

Page 52: ...0 20 38000 0 22 9000 0 02 19000 0 15 29000 0 19 39000 0 23 10000 0 02 20000 0 20 30000 0 19 40000 0 24 f MHz dB mi f MHz dB mi f MHz dB mi f MHz dB mi 11000 0 05 21000 0 43 31000 0 29 2000 0 02 12000 0 05 22000 0 53 32000 0 29 3000 0 02 13000 0 06 23000 0 56 33000 0 30 4000 0 02 14000 0 06 24000 0 51 34000 0 30 5000 0 02 15000 0 08 25000 0 45 35000 0 32 6000 0 02 16000 0 11 26000 0 38 36000 0 32 7...

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