MDC–2100
Contents
1. FIGURE 5 SWEEP SPAN LIST WITH MDC INSTALLED enne nnnm n nennen rentrer 6 FIGURE 6 ANALYZING AN MDC SIGNAL eiocsssxE orae uH eO ke gv pba eU ge eue sv aan 6 FIGURE 7 SELECTING A SIGNAL WITH THE MDC 8 FIGURE 8 SELECTING THE PROPER MDC BAND AND FILTER eren nnne 8 PIGUREDEXAMPEBSTPSTORINCGSNSPUNINS 9 FIGURE TIO ANALYZE MODE USING THE MDC 10 FIGURE 11 PROPER MTU ORIENTATION FOR TESTING BAND 1 3 9GHD 12 FIGURE 12 PROPER MTU ORIENTATION FOR TESTING BAND 2 amp 3 9 21 7 12 KEL MDC 2100 10 22 03 Introduction The OSCOR Microwave Downconverter option MDC 2100 expands the OSCOR s frequency range limit to 21GHz Microwave signals tend to be directional therefore the MDC 2100 features an array of high gain directional antennas The MDC 2100 is compatible with the OPC interface and the OTL locator options It can function in the sweep analyze and correlation modes and includes a tripod which provides the stability needed to securely point the downconverter antennas and a swivel neck for easy positioning Figure 1 MDC 2100 MICROWAVE DOWNCONVERTER Since the range of frequencies at this level 1s so broad it would take an excessive amount of time to view the entire spectrum therefore a special folding process 1s implemented to increase the scanning speed This2. OSCOR display Exactly where each frequency will be generated is noted on the MTU label 5 If you switch to the analyze mode and center the frequency a tone should be heard 9 Press the F2 button to change the frequency range and verify the presence of a signal generated by the MTU 10 The MTU will generate signals for approximately 3 three minutes after the power button is pressed Press the button again to reactivate if further testing is needed SiN eS ps NN KEL MDC 2100 12 10 22 03 MDC 2100 Specifications Frequency Range 3 21 GHz Conversion output 5MHz to 3005MHz Frequency Bands of Operation Band 1 3 9GHz Band 2 9 15GHz Band 3 15 21GHz All Band 3 21GHz Antenna Gain Band 1 10 dB Band 2 9 dB Band 3 9 dB MDS Minimum Detectable Signal including receiver sensitivity antenna gain and filtering losses Band 1 110 dBm Band 2 110 dBm Band 3 110 dBm Input Power 300 milliamps at 12 volts Weight 1 1 Ib 5 Kg Dim 11 41n 29cm 3 1in 8cm 1 41n 3 5cm Tripod Weight 7716 35 Kg Dim 8 751n 22 2cm x 2 51n 6 4 x 1 51n 3 8cm Usage Height 5 5in 14cm Case Dimensions Size HxWxD 6 25 x 18 5 x 14 5 in 47 x 36 8 x 15 9 KEL MDC 2100 13 UPDATE TO MDC 2100 USER S MANUAL The newest revisions of the OSCOR key now allow for the exact identification of signal locations with the MDC 2100 OSCOR keys release 40010 and higher are needed for this functionality
3. To identify the correct freguency of a signal follow these steps 1 2 J 4 Place the cursor over the desired signal Change to Analyze mode Press F4 MDC Anlz and narrow to the MDC choices to a single antenna F2 and a single filter F3 The label Identify appears over F4 Verify the cursor is still locked on the desired signal Press F4 Identify The waveform will move left or right The actual frequency of the signal is displayed above the spectrum under the corresponding Move Left and Move Right labels ove Left Move Right 10 0213398 1 5 9786616 19 521555 MDC Bis 97866165 SIGNAL pore REFERNCE ANALYZE B GIGHRL 18 06 21 DEUIATION All Band 9 15GHz Filter B Identiful EXIT Figure 1 USING IDENTIFY TO VERIFY A SIGNAL In the example above the signal location is at 10 02GHz
4. of the MDC the following positioning should be utilized 1 3 9 GHz band MTU and MDC should be both horizontally oriented 2 9 15 GHz band MTU and MDC should be perpendicularly oriented 3 15 21 GHz band MTU and MDC should be perpendicularly oriented KEL MDC 2100 T 10 22 03 Figure 13 PROPER MTU ORIENTATION FOR TESTING BAND 2 amp 3 9 21GHZ Since the MDC 2100 is very sensitive receiving device it is very possible for the MDC 2100 to detect sub harmonics from the MTU In other words when using the MTU additional signals may appear at frequencies other than the main transmitted The best way to determine if a signal is being radiated from the MTU is to move the MTU away from the MDC and see if the signal disappears or go the analyze mode in the OSCOR and listen for the modulated tone from the MTU AII signals from the MTU will contain the modulated tone To use the MTU with the MDC Connect the MDC to the OSCOR Switch the OSCOR to the 3 21 GHz frequency range Press the F4 button to change to the MDC Anlz mode Press the F2 button to change to the 3 9 GHz frequency range Place the MTU in front of the MDC DO NOT place the MTU closer than 3 from the MDC Remember to orient the MTU properly for the frequency you are testing Press the power button on the MTU The LED will light up when the MTU is active A signal will be generated in each frequency range 3 9GHz 9 15 GHz 15 21 GHz and should be visible on the
5. process folds the spectrum from 3 21 GHz into a 1 5GHz window While this process may seem confusing it greatly facilitates the ability to cover a broad frequency range in a timely process and maintain the ability to accurately determine the frequency of the transmitted signal Figure 22 below illustrates the down conversion process All Numbers Antennas in GHz 3 0 9 15 15 21 Figure 2 ILLUSTRATION OF THE MDC 2100 DOWNCONVERSION PROCESS KEL MDC 2100 3 10 22 03 When the range 3 21 GHz is selected all twelve 1 5 GHz windows display simultaneously using all three antennae Each of the three antenna freguency bands 3 9 GHz 9 15 GHz or 15 21 GHz may be displayed separately showing four 1 5 GHz MHz windows folded simultaneously Using the built in microwave filters can reduce the display to two folded windows These filters are referred to as Filter A and Filter B Below is a chart representing the display of the frequencies in response to the selected antenna and microwave filter Understanding FIGURE 3 is critical to understanding the OSCOR operations using the MDC 2100 Note The OSCOR display always shows the various 1 5GHz windows super imposed on each other ANTENNA Filter A Filter B Filter A amp B 3 9 GHz 4 5 6 3 4 3 4 5 6 3 45 6 7 5 7 5 9 6 7 5 7 5 9 12 13 5 13 5 15 12 13 5 13 5 15 18 19 5 19 5 21 18 195 19 5 21 Figure 3 MDC 2100 OPERATIONAL FREQUENCY BANDS Installing the MDC
6. radiators As the frequency increases the penetration of the RF signal through building materials decreases rapidly Therefore most high frequency microwave signals are often considered to be a line of sight communication link If you locate a microwave surveillance device the receiving station will be in the direction of the transmission antenna Also as frequency increases the size of the antenna used for transmission also decreases Therefore in order to penetrate through building materials and to transmit long distances microwave transmissions are usually done using high gain directional antennas Reflections from metal structures in a building can greatly complicate the location and detection process Furthermore these reflections tend to de polarize the transmitted signals rather quickly The MDC 2100 antennas are linearly polarized and there is some concern that the polarization effect of the MDC 2100 antennas could cause the user to overlook a transmitter due to an incorrect polarization effect However our experience and testing indicate that this is not a problem because of the reflective nature of the metal structures in a normal building environment Because of the principles above it is important to understand that to properly use the MDC 2100 it is necessary to point the MDC 2100 in all directions of possible concern It is advisable to move the MDC 2100 to different locations in the room It has been suggested that because of
7. 10 22 03 INTERNATIONAL PROCUREMENT SERVICES OVERSEAS LTD 163 169 Brompton Road Knightsbridge London SW3 1PY U K Phone 44 20 7258 3771 Fax 44 20 7724 7925 e mail sales intpro co uk web sites www intpro co uk amp www securitysearch co uk MDC 2100 MICROWAVE DOWNCONVERTER FOR THE USLUR OMNI SPECTRAL CORRELATOR OWNER S GUIDE VER 1 2 KEL MDC 2100 10 22 03 Table of Contents TA LEO EN na aa ee 2 TABLE OF RE ani 2 INTRODUCTION nee Nb SAS Lan 3 INSTAN GEN En oa AB sks 4 OSCOR OPERATIONAL CONTROL OF THE MDC 2100 ooocoooooooooooooooooooooooooooooooooooo oo oooo 5 OSCOR SWEEP AND ANALYZE MODES WITH THE MDC 2100 cc enam 6 SPECIAL CONSIDERATIONS FOR STORING A SWEEP SPAN WITH THE MDC 2 0 0 0 ec ec nana 8 STORING A SIGNAL IN THE MDC FREQUENCY RANGE IIR Rene hene eere hene entre rere senten reus 9 MICROWAVE TRANSMISSION CONSIDERATIONS WHEN UTILIZING THE MDC 2100 10 USING THE MTU 2100 MICROWAVE TEST UNIT oooooooooooooooooocoooooooocoooooooooooooooooooooooooooooo o 11 MDC 2I00 SPECIFICATIONS as PARI E LAUFE EFE OR s aR PEE 13 Table of FIGURES FIGURE MDC 2100 MICROWAVE DOWNCONVERTER 3 FIGURE 2 ILLUSTRATION OF THE MDC 2100 DOWNCONVERSION PROCESS 3 FIGURE 3 MDC 2100 OPERATIONAL FREQUENCY BANDS oo naa 4 FIGURE 4A INSTALLATION OF THE eism pete Na ba aa OUR Jane 5
8. 2100 In order to use the MDC 2100 with the OSCOR a special connector the OEP 2100 must be installed in the connector tray of the OSCOR This connector should be installed permanently into the connector tray and provides for easy connection of the MDC 2100 while not affecting the OSCOR normal operation Note the step numbers on the figure below to assist in the installation To install the OEP 2100 connector for use with the MDC 2100 1 Remove the OEP connector from the MDC packaging and insert the male mini din connector into the expansion port of the OSCOR as shown in the figure It may be necessary to unplug the two tape recorder cables labeled REMOTE OUT RECORDER 2 Insert the black metal support into the connector tray The cables that provide connection to the tape recorder controls must be placed under the black metal support 3 Use the provided hex wrench Alan wrench to tighten the two hex screws into place This is what holds the OEP into position 4 Unplug the UF UHF BNC connector and plug it into the OEP at the properly labeled Jack 5 Plug the OEP BNC cable into OSCOR HF UHF input KEL MDC 2100 4 10 22 03 To install MDC 2100 1 Plug MDC BNC connector into OEP BNC jack 2 Plug MDC mini din connector into the jack labeled MDC POWER CTRL 3 Utilize the OSCOR keypad for function control of the MDC 2100 T Lm i Iu 3 3 Figure 4 INSTALLATION OF THE
9. OEP The MDC 2100 can be used in a stationary position sitting on the provided tri pod or it can be moved around the environment to provide a thorough sweep of the area An extension cable is provided to move the MDC 2100 away from the OSCOR There is minimal signal loss from using this cable because of the pre amplification and down conversion process of the MDC 2100 OSCOR Operational Control of the MDC 2100 Operational control of the MDC 2100 is provided by the OSCOR keypad using the normal OSCOR functional control For example in the OSCOR SWEEP or ANALYZE modes pressing the F1 button will toggle through all of the OSCOR inputs including the MDC 2100 frequency bands Further more in the SWEEP mode pressing the RECALL button will display the OSCOR available inputs including the MDC inputs Some of the other normal OSCOR functions that are impacted by the MDC 2100 are described below KEL MDC 2100 10 22 03 lect vian Rotary FRE OARRA jc OOM AAA gentenan AC seth AA Ah AA Ah S n M Ml 0 D n i MDOICOCDOOO C Me OoNOOOOT h mr Tan Tl m br Aoi hh hh Lt SNS SS te ES T C EDIT SELECTED SPAN EDIT EDIT Span DELETE OFF GROUP ERIT Figure 5 SWEEP SPAN LIST WITH MDC INSTALLED With the MDC 2100 frequency spans selected in either the SWEEP or ANALYZE modes there is an additional configuration menu available for the operation of the MDC Pressin
10. g the F4 button accesses this configuration menu In this display mode you can select the various combinations of MDC antennas and filters without changing the frequency span FI always returns to the All band 3 21 GHz frequency window F2 Selects a specific Frequency band F5 Selects the Filter A or A amp B F4 is used to identify which of the remaining two frequency choices after narrowing to one Band and one Filter MENU returns to the normal menu for the SWEEP and ANALYZE modes ANALYZE RP SIGNAL 08 04 08 1 DEVIATION Bii Bandi SsiSGHzlrilter B Identifu ERIT p T Figure 6 ANALYZING AN MDC SIGNAL OSCOR Sweep and Analyze Modes with the MDC 2100 In the Sweep mode the cursor frequency is no longer representative of a single frequency because of the folding principle described in the introduction of this manual Therefore when the entire frequency spectrum is displayed from 3 to 21 GHz only the local frequency is displayed for the cursor frequency In this display it is important to note that the OSCOR is in the MDC mode and not confuse this display with the normal Whip Hi frequency display When a single antenna band 1s selected as described by figure 3 the cursor frequency represents 4 different possible frequencies and when a specific filter 1s selected A or B then the cursor frequency represents 2 different possible frequencies When rolling the cursor rotary dial back and forth half of the numbers rep
11. nd then use the EXPAND and NARROW keys to adjust the frequency span To store a specific frequency span 1 Ensure that the OSCOR is in the SWEEP mode and the MDC is connected KEL MDC 2100 g 10 22 03 2 Type in the desired center frequency between 3 and 21 GHz 3 Adjust the freguency span using the EXPAND and NARROW keys The span is noted by the number in the top left corner of the OSCOR display 4 Press the STORE button 5 To review the stored spans simply press the RECALL button from the SWEEP mode There are some important aspects of storing spans that should be understood If you store specific freguency band in the range for example 5 6 to 5 8 GHz the MDC will also simultaneously search a parallel freguency band 1n the example it will also search from 6 2 to 6 4 GHz You cannot store frequency spans that cross the 1 5 GHz cross over points See FIGURES 2 and 3 for the 1 5GHz bands Therefore to search specifically from 4 to 6 GHz as an example you may choose to search the 3 to 9 GHz antenna band with the Group A filter to cover the range from 4 5 to 6 GHz See Figure 3 And then store range centered at 4 25 GHz with 500 MHz span to cover from 4 to 4 5 GHz However the fastest and simplest method would be to simply cover the entire span from 3 to 9 GHz with both Group A amp B filters selected When storing a span in memory the actual frequency limits are not displayed in the frequency s
12. pan list as shown in FIGURE 5 However pressing the RECALL button will recall the span showing the stored frequency span Tosummarize these effects If you desire to cover a frequency span that is greater than 1 5GHz or crosses the antenna bands the best approach is always to cover the entire antenna band that includes the desired frequency span The table below provides some examples and recommended search span for speed and accuracy Example of a Desired Recommended Frequency Span Implementation 4 6 GHz 3 9 GHz 8 10 GHz 3 21 GHz 13 16 GHz 3 21 GHz Figure 10 EXAMPLES OF STORING SPANS Storing a Signal in the MDC Frequency Range When a signal is stored in the OSCOR signal database only the signal frequency is stored in OSCOR memory However when the OSCOR tunes to a specific signal in the MDC frequency band 3 21GHz then the OSCOR automatically directs the MDC to the proper KEL MDC 2100 9 10 22 03 antenna band and filter group to maximize the signal to noise ratio and maximize the system performance An example signal is shown below FIGURE 11 Me SPS Be Mie 1209 29 PLA IL p REFERNCE EST GHA os DEVIATLON all cT Ane Tas Blldentiful EX Figure 11 ANALYZE MODE USING THE MDC Microwave Transmission Considerations when Utilizing the MDC 2100 There are important principles and considerations to understand when dealing with very EH frequency
13. resenting potential signal frequencies will be increasing while others will be decreasing This again is due to the down conversion process KEL MDC 2100 6 10 22 03 Often signals will have shape due to the downconversion In Figure 8 signal is selected using the OSCOR NARROW button and the OSCOR rotary dial This signal has a rather strange shape because of the folding process of the down conversion but it provides an excellent indicator for the proper signal downconversion Hence by pressing the F4 MDC Anlz button to further analyze the signal it is possible to analyze which antenna and filter that 1s actually receiving the signal Figure 8 shows the proper antenna selected and the proper filter selected which corrects the signal shape Furthermore the unusual signal shape of Figure 7 indicates that this signal should be a Filter B signal From the sweep mode it is impossible to tell the exact frequency of the transmitted signal To identify the correct frequency of a signal follow these steps 1 Place the cursor over the desired signal 2 Change to Analyze mode 3 Press F4 MDC Anlz and narrow to the MDC choices to a single antenna F2 and a single filter F3 The label Identify appears over F4 4 Verify the cursor is still locked on the desired signal Press F4 Identify The waveform will move left or right The actual frequency of the signal is displayed above the spectrum under the corresponding Mo
14. the microwave reflections it may be possible to completely cover a room by pointing the MDC 2100 directly at the ceiling The concept is that due to the metal in most ceiling structures there would be enough reflective effect to detect a KEL MDC 2100 10 10 22 03 transmitter from any location in the room This method has some merits but it 1s impossible to predict how reliable that it would be in all situations Therefore this method should only be used when it 1s absolutely necessary in order to save time A good rule of thumb is to assume that the MDC 2100 has an antenna pattern that is about 100 degrees wide In other words it is necessary to point the MDC 2100 in at least 4 different directions around the room to cover the perimeter Also the MDC 2100 should be pointed up and possibly moved around the room to cover the ceiling and down to cover the floor Furthermore if you expect a very sophisticated threat it is recommended to point the MDC 2100 into duct work above ceiling tiles and in any enclosed spaces in which it would be possible to place a transmitter with a high gain antenna At each position that the MDC 2100 is placed it is necessary to allow the OSCOR time to sweep the entire frequency spectrum from 3 to 21 GHz For this case it is highly recommended that the All Pass mode of operation for the MDC 2100 be utilized When a signal is detected the user can then manually select the different antenna bands and filters to f
15. urther investigate the signal Or the user can simply go to the analyze mode and allow the MDC 2100 to determine the operational frequency of the transmitter Also it is not recommended to use the MDC 2100 with the OSCOR automatic mode unless the MDC 2100 directional characteristics are taken into consideration Also when running the OSCOR and MDC in the automatic mode it is recommended to search the entire frequency span with both A amp B filter selected as previously described Using the MTU 2100 Microwave Test Unit The MTU 2100 is designed to provide a simple test to verify that the MDC is working properly When the button is pressed on the MTU low power microwave signals are generated at 3 different frequencies for 3 minutes The frequency of these signals 15 labeled on the MTU Each transmitted signal contains a modulated tone between 900Hz KHzfor audio identification It is important to note that the frequency transmissions from the MTU may drift slightly It should also be noted that the MTU test transmitter and the MDC down converter both have polarized antennas When using the MDC in a room environment the polarization is often not of great concern because of the depolarizing effect that occurs from reflections from the room structure However when verifying proper operation of the MDC using the MTU at a close proximity the polarization of the antennas is important To achieve the proper polarization with the high eain antennas
16. ve Left and Move Right labels ove Left Move Riaht 10 0213396 3 9796616 10 0212320 MDC 5222276 SIGNAL ANALYZE RF SIGNAL 15 06 21 DEUIATIO All Band 9 15GHz Filter BlIdentify Ex Figure 7 USING IDENTIFY TO VERIFY A SIGNAL M T In looking at the frequency span limits these limits are always between 0 and 3GHz This is because the OSCOR is a spectrum analyzer that covers the frequency range up to 3GHz but the input frequencies of the down converter cover 3 to 21 GHz Therefore the cursor frequencies provide the possible signal frequencies while the span numbers 1ndicated at the top right and left of the display provide the frequency span the OSCOR is actually viewing after the down conversion process KEL MDC 2100 7 10 22 03 Technical Note It is possible to have a very slight shift in frequency in the down conversion process In the example below the signal shifted by about 50KHz This is minimal shift considering the signal is at 10GHz ey Mie P10 O21 306 1 E a L 2 Fr ISO 12 475606 13 2651208 47 35 ce 57860 479 TNT pi 5 i58hz Hil Band 9 1 iB uz TEI tr Hm EsIl iv 26 icu ASSUM B1 Pa n Toke O06 Special Considerations for Storing a Sweep Span with the MDC since the MDC down conversion process displays multiple frequency bands at once the easiest way to quickly view a specific frequency span is to type in a desired center frequency span a
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