EMCO 3140 Instruction 电路图.pdf

EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 Model 3140 BiConiLog Antenna MANUAL RadioFans.CN 收音机爱 好者资料库 MODEL 3140 BICONILOG ANTENNA EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 EMC Test Systems, L.P. reserves the right to make changes to any product described herein in order to improve function, design or for any other reason. Nothing contained herein shall constitute EMC Test Systems, L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. EMC Test Systems, L.P. does not convey any license under its patent rights or the rights of others. Copyright 2002 by EMC Test Systems, L.P. All Rights Reserved. No part of this document may be copied by any means without written permission from EMC Test Systems, L.P. E-MAIL with both hands, rotate the antenna and bow-tie into a vertical position resting on a flat surface (see Figure 2). The antenna can now rest by itself on the feet of the balun box, and the bottom edge of the bow-tie elements. FIGURE 2 - Assembly Steps 2 through 4 Step 3. Attach the other bow-tie element to the antenna balun box (see Figure 2). The antenna should rest on the balun end and stand vertically to attach the 2nd bow-tie with the opposite hand knob. Step 4. The long T leg elements are installed and clamped to the bow-ties (Figure 2) with the antenna standing vertical. Assembly Instructions MODEL 3140 BICONILOG ANTENNA 6 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 Step 5. The four diagonal struts should be installed. Loosen the thumbscrews at the mount on the T legs and at the boom mounts to install the strut ends. Place the pocket of the straight end facing the raised face of each mount and tighten the thumbscrew to lock in place (see Figure 3). FIGURE 3 Assembly Step 5 MODEL 3140 BICONILOG ANTENNA Assembly Instructions EMC TEST SYSTEMS, L.P. MARCH 2002 7 REV C PN 399258 Step 6. The V elements should be installed and tightened using the thumbscrews through the boom (see Figure 4). FIGURE 4 Assembly Step 6 The antenna is now ready for mounting on a boom of a stand such as the ETS-Lindgren 7-TR or mast such as the ETS-Lindgren 2070 series. See the next section “Mounting Instructions” for more details. Mounting Instructions MODEL 3140 BICONILOG ANTENNA 8 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 MOUNTING INSTRUCTIONS The Model 3140 boom has dual mounting brackets that are spaced 8” on center. The dual mounts make the Model 3140 very stable on a boom when polarizing and moving up and down a mast. Step 1. Install the antenna adapters onto the two mount brackets on the antenna boom (see Figure 5). These have a 7/8” threaded hole for an ETS-Lindgren mount knob. Install the threaded insert adapter into the 7/8” hole if a ” thread is required on the mounting stand or mast. FIGURE 5 Attachment of antenna mount adapters to Model 3140 MODEL 3140 BICONILOG ANTENNA Mounting Instructions EMC TEST SYSTEMS, L.P. MARCH 2002 9 REV C PN 399258 Step 2. The antenna can be mounted on standard ETS-Lindgren perforated cross booms using two 7/8” mount knobs through the 2” square boom (see Figure 6). FIGURE 6 Attachment of Model 3140 to perforated offset boom. The antenna can be mounted to the 2” square booms of the following ETS-Lindgren products: Model 7-TR tripod stand (see Figure 7), Model 2075 MiniMast tower (see Figure 8), and Model 2070/2071 towers (see Figure 9). For other 2” square booms, two slip-on boom brackets that do not require through holes in the boom can be used to mount the antenna. Mounting Instructions MODEL 3140 BICONILOG ANTENNA 10 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 FIGURE 7 Attachment of Model 3140 to Model 7-TR heavy duty antenna stand FIGURE 8 Attachment of Model 3140 to Model 2075 MiniMast MODEL 3140 BICONILOG ANTENNA Mounting Instructions EMC TEST SYSTEMS, L.P. MARCH 2002 11 REV C PN 399258 FIGURE 9 Attachment of Model 3140 to Model 2070 or 2071 Tower Application MODEL 3140 BICONILOG ANTENNA 12 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 APPLICATION Assemble and mount the Model 3140 per the instructions in the previous sections. Connect an N-type coaxial cable from the antenna connector to a signal generator or amplifier. Contact with any metal or non-metallic structure can capacitively load the antenna, which may cause unrepeatable results. Therefore, care must be taken to ensure that no part of the dipole elements or bow-ties are in contact with the tripod or tower, particularly in vertically- polarized tests. Where possible, run the feed cable straight back at least 1 meter or more from the Model 3140 before dropping vertically. Both horizontal and vertical polarization is easily accomplished when the Model 3140 is mounted on an ETS-Lindgren tower. The Model 7-TR tripod is designed specifically for the T bow-tie BiConiLog antennas to allow easy polarization changes, and with the air polarization option can provide automated polarization using a Model 2090 controller. The previous section “Mounting Instructions” shows the mounting scheme for both ETS-Lindgren towers and the 7-TR tripod. For immunity testing, the electric field strength generated at a distance d can be approximated by the formula ()E Pg d V / m = 30 where d is in meters, g is the numeric gain (10GdB/10, see attached calibration data), and P is antenna net input power in Watts. An estimate of the power required for any MODEL 3140 BICONILOG ANTENNA Application EMC TEST SYSTEMS, L.P. MARCH 2002 13 REV C PN 399258 field strength E can be obtained from Figure 12 or 13 in the Typical Data section below, which shows forward power required in Watts to generate 1 V/m. Note that while the formula provided above is based on the net power (forward minus reflected) transmitted by the antenna, the gain determined from the antenna factor already contains effects due to mismatch, so the formula then predicts the required forward power rather than net power. To determine the power (in Watts) required for any other field strength not shown, multiply the power required for 1 V/m by the desired E-field squared, or ()()P EE PV / mV / m= 2 1 To determine the additional amplifier overhead required to handle 80% amplitude modulation, multiply the result by 3.24 (1.82). Actual transmitted field strength should be verified using an ETS-Lindgren Model 7200 series electric field probe or equivalent. Figures 14 and 15 show power requirements for the lower frequencies at 3 meters based on measurements using a field probe on an OATS over both conducting ground and a (2.4m)2 ferrite absorber field over conducting ground. For IEC 1000-4-3 type testing, the antenna tip can be placed at any distance between 1 and 3 meters from the EUT as long as the front face plane is illuminated according to the -0, +6 dB uniform field specification. In general, closer distances require less power to create a given field strength. Typical Data MODEL 3140 BICONILOG ANTENNA 14 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 TYPICAL DATA Figure 10 shows the typical VSWR for the Model 3140 in the frequency range from 26-2000 MHz. Figure 11 shows the typical horizontal antenna factors for the 3140 in the same range. The separation distance for the ANSI C63.5 3 and 10 meter calibrations is measured from the antenna midpoint, while for SAE/ARP-958 1 meter calibrations the distance is measured from the antenna tip. Midpoint is defined as half the distance between the small elements and the bow-ties, which is about 65 cm from the small end tip. Figure 12 shows the typical forward power required for 1, 3, and 10 V/m (with and without 80% amplitude modulation) at 1 meter from the tip of the antenna, while Figure 13 is for 3 meters from the antenna tip. Figures 14 and 15 show power requirements for the lower frequencies at 3 meters based on measurements using a field probe on an OATS over both conducting ground and a (2.4m)2 ferrite absorber field over conducting ground. The power shown was measured with 1.5 meter transmit antenna and probe height and horizontal polarization. Horizontal polarization represents the worst-case power requirement; typically less power is required for vertical polarization. In practice, many users place ferrite tiles on the ground between the antenna and probe to reduce reflected-ray interference. For any other field strength E, multiply the power in Watts for 1 V/m by E2. MODEL 3140 BICONILOG ANTENNA Typical Data EMC TEST SYSTEMS, L.P. MARCH 2002 15 REV C PN 399258 1010010002000 1 10 100 VSWR Frequency (MHz) FIGURE 10 - Model 3140 typical VSWR. 2010010002000 0 5 10 15 20 25 30 35 1 m 3 m 10 m AF (dB (1/m) Frequency (MHz) FIGURE 11 Model 3140 typical antenna factors. Typical Data MODEL 3140 BICONILOG ANTENNA 16 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 2010010002000 0.005 0.01 0.1 1 10 100 10 V/m 80% AM 10 V/m 1 V/m 80% AM 3 V/m 1 V/m 80% AM 1 V/m Forward Power (W) Frequency (MHz) FIGURE 12 Model 3140 typical 1 meter forward power based on 1 meter antenna factor. 2010010002000 0.01 0.1 1 10 100 500 10 V/m 80% AM 10 V/m 1 V/m 80% AM 3 V/m 1 V/m 80% AM 1 V/m Forward Power (W) Frequency (MHz) FIGURE 13 Model 3140 typical 3 meter forward power based on 3 meter antenna factor. MODEL 3140 BICONILOG ANTENNA Typical Data EMC TEST SYSTEMS, L.P. MARCH 2002 17 REV C PN 399258 2026100300 0.01 0.1 1 10 100 1000 10 V/m 80% AM 10 V/m 1 V/m 80% AM 3 V/m 1 V/m 80% AM 1 V/m Forward Power (W) Frequency (MHz) FIGURE 14 Model 3140 typical 3 meter forward power measured over ferrite tile. 20100300 0.01 0.1 1 10 100 1000 10 V/m 80% AM 10 V/m 1 V/m 80% AM 3 V/m 1 V/m 80% AM 1 V/m Forward Power (W) Frequency (MHz) FIGURE 15 Model 3140 typical 3 meter forward power measured over conducting ground. Specifications MODEL 3140 BICONILOG ANTENNA 18 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 SPECIFICATIONS Electrical (nominal) Frequency range 26 - 2000 MHz Input impedance 50 VSWR 2:1 average CW power 750 W Symmetry +/- 0.5 dB Connector Type N female Physical Height (T bow-tie) 76.65 cm 30.18 in Width (T bow-tie) 161.5 cm 63.60 in Depth (length) 149.3 cm 58.78 in Weight 10 kg 22 lbs MODEL 3140 BICONILOG ANTENNA Maintenance EMC TEST SYSTEMS, L.P. MARCH 2002 19 REV C PN 399258 MAINTENANCE The ETS-Lindgren EMCO brand Model 3140 was designed to be used for Immunity testing. Because the testing is for immunity, the generated field is measured with a calibrated field probe, not the Model 3140. Thus it is not required that the Model 3140 be recalibrated regularly. If you would like to have your Model 3140 antenna verified or serviced please contact our Calibration Department. For more information about our calibration services or to place an order for antenna calibration, visit our calibration website at Warranty Statement MODEL 3140 BICONILOG ANTENNA 20 EMC TEST SYSTEMS, L.P. MARCH 2002 REV C PN 399258 WARRANTY STATEMENT EMC Test Systems, L.P., hereinafter referred to as the Seller, warrants that standard EMCO products are free from defect in materials and workmanship for a period of two (2) years from date of shipment. Standard EMCO Products include the following: ? Antennas, Loops, Horns ? GTEM cells, TEM cells, Helmholtz Coils ? LISNs, PLISNs, Rejection cavities & Networks ? Towers, Turntables, Tripods & Controllers ? Field Probes, Current Probes, Injection Probes If the Buyer notifies the Seller of a defect within the warranty period, the Seller will, at the Sellers option, either repair and/or replace those products that prove to be defective. There will be no charge for warranty services performed at the location the Seller designates. The Buyer must, however, prepay inbound shipping costs and any duties or taxes. The Seller will pay outbound shipping cost for a carrier of the Sellers choice, exclusive of any duties or taxes. If the Seller determines that warranty service can only be performed at the Buyers location, the Buyer will not be charged for the Sellers travel related costs. This warranty does not apply to: ? Normal wear and tear of materials ? Consumable items such as fuses, batteries, etc. ? Products that have been improperly installed, maintained or used ? Products which have been operated outside the specifications ? Products which have been modified without authorization ? Calibration of products, unless necessitated by defects THIS WARRANTY IS EXCLUSIVE. NO OTHER WARRANTY, WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED, INCLUDING BUT NOT LMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REMEDIES PROVIDED BY THIS WARRANTY ARE THE BUYERS SOLE AND EXCLUSIVE REMEDIES. IN NO EVENT IS THE SELLER LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY. Note: Please contact the Sellers sales department for a Return Materials Authorization (RMA) number before shipping equipment to us.