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Quick Installation Guide 

 

 

Document 

WERA4-Quick-US-200917 

Page 9 of 73 

 

4.5 

A/D converter  -  ADC 

 

 

 

 

 

 

 

 

 

 

1.6.4 

– Analog signal in, N+3 

 

 

 

 

 

1.6.3 

– Analog signal in, N+2 

 

 

 

 

 

1.6.2 

– Analog signal in, N+1   

 

 

 

 

 

1.6.1 

– Analog signal in, N 

 

 

 

 

 

 

 

1.6.5 

– LED  

    

     indicates sampling 

 

 

 

Figure 8

: ADC Module 

 
Each ADC module samples I and Q information of four receive channels.

Содержание WERA

Страница 1: ...4 Quick US 200917 Page 1 of 73 Quick Installation Guide Version 1 2 September 2020 HELZEL Messtechnik GmbH Carl Benz Strasse 9 24568 Kaltenkirchen Germany www helzel com e mail wera helzel com Tel 49...

Страница 2: ...ion of the transmit antenna system complies with the FCC requirements Depending on the radar operation frequency the antenna gain and the cable loss between power amplifier and Tx antenna system the m...

Страница 3: ...is equipment has been tested and found to comply with the limits as defined for a Class A device in part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful...

Страница 4: ...Page 4 of 73 4 WERA Hardware 0 0 User Interface PC 1 0 Frequency Control Rack 1 1 CLK 1 2 SRX 1 3 STX 1 4 SDU 1 5 STM 1 6 ADC 1 7 ADU 2 0 REceiver Rack 2 1 REC 1 to 12 3 0 Power Amplifier 3 1 Manual...

Страница 5: ...TU 1 18 Control Status RSC Logic 1 19 Control Power RSC 230V Figure 2 Back view WERA FCR 2 0 REceiver Rack 2 7 Status RER 2 1 RER power control 2 2 RER control input 2 3 Cal input 2 4 LoD input 2 5 An...

Страница 6: ...AIP 4 1 WERA FCR FrequencyControlRack Figure 4 FCR Block Diagram The frequency control rack generates all required rf signals clock and sweep and provide the Tx and Lo signals In addition to that it...

Страница 7: ...to be connected to STM 1 1 2 Trigger signal out to be connected to STM Figure 5 Clock Module Master clock for the whole WERA system The standard module has got one clock and trigger output only The th...

Страница 8: ...part in case of a failure of the Rx sweep The sweep dummy is an empty housing in an unused sweep module slot of the FCR Its purpose is to keep the correct airflow and thus the proper cooling of the ot...

Страница 9: ...age 9 of 73 4 5 A D converter ADC 1 6 4 Analog signal in N 3 1 6 3 Analog signal in N 2 1 6 2 Analog signal in N 1 1 6 1 Analog signal in N 1 6 5 LED indicates sampling Figure 8 ADC Module Each ADC mo...

Страница 10: ...unit controls data acquisition and stores measurement data on the user interface pc It communicates with the user interface pc and forwards all needed parameters to the control unit 4 7 WERA CTU WERA...

Страница 11: ...Through this connection system settings are programmed and system status can be monitored The RSC 230 module is used to remotely switch on and off individual parts of the WERA system e g to save power...

Страница 12: ...lter The receiver rack holds the input filters and receiver modules of up to 12 channels For this version the Receiver Input Filters RIN filters chapter 4 11 and the Calibration Splitter Unit Cal Spli...

Страница 13: ...ation antenna input Figure 15 RIN Module Each RIN module contains a band pass input filter as well as the relays for the internal calibration The filter is designed for a specific frequency and bandwi...

Страница 14: ...s needed the RIN modules have to be exchanged In older WERA versions the lid of the RER unit need to be removed to get access to the SMA connectors 4 11 3 Receive Input Filter RIN for 8 channels Figur...

Страница 15: ...nvironment no Software updates no modified PA then it can be used as a normal RIN default Filter path is active 4 11 5 Supply for Active Rx Antennas All Receiver Input Filters can supply the dc voltag...

Страница 16: ...phase fine adjustment 2 1 2 Analog signal out to ADC Figure 19 Receiver Module The receiver modules receive the antenna signal over the receiver input filters mix it down in frequency and amplify it...

Страница 17: ...e figure 21 This version can provide up to 80 Watts output power to compensate cable loss The antennas should be connected via an external 1 4 power splitter with two pairs of phase cables the longer...

Страница 18: ...e TX input and two separate TX Outputs one for each frequency Internally they are connected to two separate low pass filters Via an additional Dsub connector the switch frequency signal is carried fro...

Страница 19: ...t PS2 RS232 special cable 9100 4 to 12 RF RIN RF cables to lightning protection 3 m 3325 1 UPS Interface PC RS232 special cable 9007 1 2 1 23 2 4 Local oscillator signal to RER With one RER only 50 Oh...

Страница 20: ...Quick Installation Guide Document WERA4 Quick US 200917 Page 20 of 73 Figure 24 Block Diagram WERA IV 12 Channel with AIP external Filters Part 1 of 2...

Страница 21: ...Quick Installation Guide Document WERA4 Quick US 200917 Page 21 of 73 Figure 25 Block Diagram WERA IV 12 Channel with AIP external Filters Part 2 of 2...

Страница 22: ...Quick Installation Guide Document WERA4 Quick US 200917 Page 22 of 73 Figure 26 Block Diagram WERA IV 8 or 12 Channel with RIN or RIN6 internal Filters Part 1 of 2...

Страница 23: ...Quick Installation Guide Document WERA4 Quick US 200917 Page 23 of 73 Figure 27 Block Diagram WERA IV 8 or12 Channel with RIN or RIN6 internal Filters Part 2 of 2...

Страница 24: ...and refer to fig 1 to 8 Take care for the correct order of connection of cable 9026 for REC and ADC The REC s are numbered from left to right the ADC inputs are numbered from bottom to top and left to...

Страница 25: ...ly one RER terminate the second LoD out with 50 Ohms 0 5 W Main Power connection 1 16 1 DIO72 1 A B 1 17 1 CPCI keyb mouse 1 17 2 CPCI LAN 1 Ethernet Input from RER Control 1 19 2 DIO72 1 B 1 19 1 DIO...

Страница 26: ...k US 200917 Page 26 of 73 1 0 WERA Interface PC 2 0 FCR 3 0 RER 4 0 Blind plate for ventilation 5 0 Power Amplifier 5 0 Room for UPS depends on rack Figure 30 WERA front view Please note Exact rack mo...

Страница 27: ...act factory to get more information about these options 4 18 Lightning Protection Plate for WERA 8 channels All WERA installations needs to be equipped with professional lightning protection units If...

Страница 28: ...connection 10 Unpack system components and install rack 2 men 11 Power up system and configure WERA Control 1 men 12 Run internal calibration 256 samples 80 Hz offset 1 men 13 Connect Calibration Box...

Страница 29: ...ter is placed inside the container for transportation it is strongly recommended to install an extra protection for the CPU heat sink 5 3 Antenna Positions Rx Antennas The Rx antenna array should be i...

Страница 30: ...vide more angular field of view Arbitrary spaced attention all inter antenna distances must be smaller than Lambda The Tx can be located on the roof of a container the Tx pattern need to be carefully...

Страница 31: ...beam width 6 dB at the edges and a soft minimum towards the Rx array 5 5 Cable Protection The Rx cables need to be protected against direct sunlight because this will lead to inhomogeneous heating re...

Страница 32: ...Watts 49 dBm If the required cable length results in a much smaller value the power amplifier should be placed outdoors next to the Tx array In this case a line power connection to this position is re...

Страница 33: ...onstruction versions are available please contact the Wera team The guide ropes should be fixed with ground nails or tent pegs their positions depend on the length of the used radials The distance bet...

Страница 34: ...ayer If required clean with a metal brush The radials should be connected with a little bit of contact grease as well Attach the radials without mechanical stress to the guide ropes using a cable clam...

Страница 35: ...out 20 cm can be achieved by changing the antenna tuning coil connection to the pole If this fine tuning 150 kHz is not sufficient there are additional options for tuning If the antenna tuning coils a...

Страница 36: ...e fed through a pipe or a closed cable channel the spool should be placed on that axis at one end The cable can be pulled through the pipe slowly if the following conditions are taken into account no...

Страница 37: ...ems CL7 needs to be restarted as well or measurement data may not be saved 5 12 Calibrations 5 11 1 Full Calibration Please do not use this calibration it takes 3 hours to run and was already carried...

Страница 38: ...es 0 260 sec sweep time 80 Hz offset Check the results using Plott_WERA_Cal_lsq according to the description in pos 11 7 In the resulting table all RMS Voltage should be almost identical and the Cal v...

Страница 39: ...ing phase difference to cable 1 can be calculated That means a cable that is longer than cable 1 will have a positive phase value These calculated phase values need to be subtracted from the phases va...

Страница 40: ...ingle Acquisition don t forget to set the frequency offset to 0Hz 512 samples 0 260 sec sweep no frequency offset Check the results using Plott_WERA_Sort_RCs_Beam_rfi according to the description in p...

Страница 41: ...before at the beginning of this chapter Start a Calibration under the WERA Control Centre Use settings for a short run 256 samples 0 260 sec sweep time 80 Hz offset Check the results using Plott_WERA...

Страница 42: ...e SMA connector to the N output connector please refer to chapter 4 14 Leave the input of the PA open do not connect the input cable to the PA Connect the line power The green LED should be on Start a...

Страница 43: ...with Switch the Receiver Attenuation on WERA Desk chapter 7 1 5 to 4 dB and increase the PA gain by 3 dB Attention Always check that at the PA no red LED is on In that case reset the PA before the ne...

Страница 44: ...5 19 Run single acquisition The system performance can be checked now by running a single acquisition It is recommended to use even for these first tests at least 512 samples Don t forget to switch o...

Страница 45: ...s window The status window can be opened over the link Open Status Window The Submit button can be used to submit new settings while the Reset button can be used to reset all input fields to the last...

Страница 46: ...stopped Test Calibration Switch WERA to non chirped single tone mode without storing data can immediately be stopped Test internal Calibration Switch WERA to internal calibration mode without storing...

Страница 47: ...rrently ignored Use different time offsets in Cont Acqu Start Time or different Working Frequency entries to avoid multiple WERAs to interfere with each other WeraDesk V2 4 and higher activates in Mas...

Страница 48: ...al transmitter is disabled by programming the TX DDS frequency to Zero DC This mode is especially useful for cross calibrations one WERA transmitting the other WERA receiving or during ship calibratio...

Страница 49: ...ettings in the configuration file home wera etc params cfg to enable post processing 7 1 10 Time code Cont Acq Start Time The Time Code field has got the following options UTC Refer WERA cycles and da...

Страница 50: ...equency band If two separate frequency bands are available then enter the start and stop frequency of the first frequency band in the Freq Management 1 fields and the start and stop frequency of the s...

Страница 51: ...ired contact the manufacturer because modifying the WeraDesk web page only will not work You might end up with a few very large range cells only 7 1 15 Working Frequency Please enter the Center Workin...

Страница 52: ...50 Hz net frequency values of 0 2167 and 0 4333 to 60 Hz net frequency Different unsynchronized values should be tested for each system and the resulting Bragg spectra examined before activating autom...

Страница 53: ...cycle repetition time 7 1 21 Number of Range Cells A value between 32 and 256 needs to be selected By multiplying the number of range cells with the range cell depth in meters the maximum processed ra...

Страница 54: ...ersions will use different DDS step values to program the RX Offset value depending on the frequency of the master clock Remark When a chirp length of 0 26 s is selected 80 Hz RX Offset refers to a si...

Страница 55: ...newer 90 7 MHz master clock is used the file should be renamed removed or contain a different string After any changes regarding this file at least one stop command needs to be submitted under WeraDe...

Страница 56: ...reload the frequency pre scan graphics For the Firefox and Internet Explorer web browsers this can be done by pressing the F5 key 7 3 WERA Status overview On each WERA UPC the results of regularly pr...

Страница 57: ...l radial current signal to noise level and a plot of external frequency usage over time from the last frequency scan Below that are some beam formed Bragg spectra followed by a Bragg spectrum for each...

Страница 58: ...uilding 7 5 WERA DPT Direct Path Test comparison overview plots optional If a time window of 2 minutes before the next measurement is available it can be useful to activate a Direct Path Test measurem...

Страница 59: ...or a standard antenna distance of 0 45 lambda the phases between the receive channels should be around 162 degrees for the DPT signal But note that due to the landscape the DPT signal might not be abl...

Страница 60: ...he previous one and so on In case there is noise on one channel which is weaker than the test signal it can be seen in these plots as well as in the status overview plots of chapter 7 3 If the noise i...

Страница 61: ...actual voltages and temperatures out of one WERA system equipped with a power supply rack with hardware version 4 0 or later Furthermore you are able to get access to the power supply of the system i...

Страница 62: ...4 0 or later If you got an earlier hardware version of the power supply rack you may use V2 6 of the software 7 10 1 1 WERA Remote Control Window The WERA Remote Control Window is the main window of...

Страница 63: ...control external hardware When you click on the button check system now new values will be read in and the display will be updated Over the Settings menu or with the help of some shortcuts you can ope...

Страница 64: ...ltages for this rack all seem to be wrong and if the software thinks this rack should be switched on now This option should only be used if a rack seems to have been switched off for an unknown reason...

Страница 65: ...on save to save your settings or on save and close to close the setup window If you want to discard your changes then click on close setup 7 10 1 3 WERA Setup Window PA Power Amplifier tab This sectio...

Страница 66: ...window do all make sense and the status displays error unconnected then the PA should be in self protection mode If all these parameters seem to be wrong the control cable is not connected or the PA...

Страница 67: ...t this mode may only be activated after continuous acquisition mode has been started over WeraDesk The information text field on the right will display parameters from the active acquisition mode and...

Страница 68: ...please click on the corresponding TEST button Make sure that no hardware is connected to the selected ports which should not be switched off Further note that the PSR in the WERA IV FCR or later do n...

Страница 69: ...mmended to use the same site name for all parts of the warning system With the check boxes in the warning Selection group box the user can select what kind of warnings should be generated The Priority...

Страница 70: ...Helzel team Note that this feature is now being replaced by the warning system If you finished configuring the software click on save to save your settings or on save and close to close the setup win...

Страница 71: ...face PC Please refer to the operators manual of the used device 7 13 WERA Remote Control The software tool WERA Remote Control is intended to read the actual voltages and temperatures For further deta...

Страница 72: ...on takes place on the WERA Server For this reason please refer to the WERA Server Manual for all visualization and data management options All WERA data processing programs are command line tools So a...

Страница 73: ...t Cal home wera etc calibration wera_ant_______________ d other methods home wera etc calibration wera_xxx_______________ 15 Calibration activated file name a b c d calibration wera Sign 17 Antenna Te...

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