Broadcast Microwave Services HCII-9 6 GHz Power Amplifier User Manual 6GHz Power Amplifier Manual
Broadcast Microwave Services Inc 6 GHz Power Amplifier 6GHz Power Amplifier Manual
user manual
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| Document ID | 819219 |
| Application ID | TNFWZ7kbikrQzOC9cCEHDw== |
| Document Description | user manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 52.08kB (650960 bits) |
| Date Submitted | 2007-07-20 00:00:00 |
| Date Available | 2007-07-23 00:00:00 |
| Creation Date | 2007-07-19 14:28:34 |
| Producing Software | Acrobat Distiller 5.0 (Windows) |
| Document Lastmod | 2007-07-19 14:28:34 |
| Document Title | Microsoft Word - 6GHz Power Amplifier Manual.doc |
| Document Creator | PScript5.dll Version 5.2.2 |
| Document Author: | asayyah |
6GHz / 4W Power Amplifier User Manual (BPA-5CC-9) Specifications are subject to change without prior notice. This document contains confidential information and is intended for customer use only. It cannot be duplicated without prior authorization from BMS. Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 Email: support@bms-inc.com Web: www.bms-inc.com WARNING! RF RADIATION EXPOSURE HAZARD This warning is provided by Broadcast Microwave Services (BMS) Inc. for safety purpose. The following information help to reduce the risk of RF exposure hazard. FCC Limit of RF Exposure According to Federal Communication Commission (FCC), the Maximum Permissible Exposure (MPE) for FR radiation has been set to 1.0 mW/cm2 for the 6 GHz Power Amplifier with maximum 4 Watt output power (OET Bulletin 65). The 6 GHz Power Amplifier (PA) may ba a part of a non-broadcast transmitter and without an antenna it will not create RF exposure (power density) exceeding the 1.0 mW/cm2 FCC limit. However a high-gain antenna such as a parabolic dish will greatly enhance the 6 GHz PA output power density beyond the MPE limit of 1.0 mW/cm2. In this situation a minimum distance from the antenna needs to be calculated in order to keep the MPE always below the safety limit. The calculation has been done for 6 GHz PA based on the formula mentioned in OET Bulletin 56. The calculations have been done for different commonly used antenna in the BAS and Public Safety/ Law enforcement applications. Figure 1 shows the plot of the minimum exposure distance for 5dBi, 16dBi, and 30dBi antennas. The 6 GHz PA transmits the maximum power of 4 Watt. The minimum exposure distances are found from the cross points of the exposure graphs (for various antennas) with the line of maximum permissible exposure (i.e. 1mW/cm2). Notice that the numbers in Figure 1 predict the worse case scenario, which is straight in front of the antenna (exposing to the antenna main-lobe). Obviously the side-lobe exposures are well below these numbers as the radiation intensity dramatically reduces on the side lobes. The antenna used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 Email: support@bms-inc.com Web: www.bms-inc.com Estimated RF Exposure for 4 W att 6GHz Pow er Amplifier 5.0 Power Density, mW/cm^2 4.0 3.0 2.0 1.0 0.0 100 200 300 400 500 600 700 Dis tance , cm Figure 1 Summary In order the keep the RF exposure within the FCC limit, it is necessary to maintain the safe distance from the antenna. The results shown in Figures 1 can be summarized in the following table: Antenna Gain (dBi) 16 Minimum permissible distance from antenna (cm) 40 112 560 30 Notice the above table indicates worst-case situation (straight in front of the antenna). Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 Email: support@bms-inc.com Web: www.bms-inc.com LINEAR POWER AMPLIFIER (BPA-5CC-9) BPA-5CC-9 is a linear power amplifier with 4 watt maximum RF power and operating at 6.425 – 6.525 GHz). This power amplifier is used for increasing the transmitting range by boosting the 6GHz transmitter power to maximum 4 Watts. Application Portable 6GHz COFDM transmitters such as 6GHz Carry-Coder II, are used behind the camera in Electronic News Gathering (ENG). These transmitters are only capable to provide a medium RF power (e.g. 250mW). This seriously limits the distance between the event site and the TV relay station. To extend the transmission range, an external amplifier is needed to boost the transmitter power in order to compensate the path loss and ensure the acceptable Received Signal Level (RSL) at the destination. The BPA-5CC-9 will increase the RF power to the maximum 4W, without adding spurious and distortions to the transmitter output. The output of the power amplifier is directly connected to the 6 GHz transmitting antenna. Figure 1 BPA-5CC-9 Linear Power Amplifier Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 Email: support@bms-inc.com Web: www.bms-inc.com Specification: Ch Frequency Output Power Input Voltage Input Current Input RF Power Gain @ 12 dBm input Gain Flatness Gain vs. Temperature Operating Temperature Storage Temperature Dimensions Weight RF Input Connector RF Output Connector 6.425 – 6.525 GHz 4 Watt max. 28 VDC 7.3 Amp 16 mW (12 dBm) max. 25 dB ± 0.5 dB Over 50 MHz ± 1 dB Over Temperature -20° to +50°C 40° to +90°C 9.5” x 5” x 3” 5 lbs Type “N” Type “N” Isolator Protected CONTACT INFORMATION Broadcast Microwave Services, Inc. Phone: 1.858.391.3050 Fax: Shipping address: 1.858.391.3049 12367 Crosthwaite Circle Poway, CA 92064 Website: http://www.bms-inc.com Email: support@bms-inc.com sales@bms-inc.com Typical application of the 6GHz Power Amplifier is shown in Figure 2. Figure 2 Typical application of the 6GHz Power Amplifier Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 Email: support@bms-inc.com Web: www.bms-inc.com The diagram of Figure 2 simply shows the connections, not indicating a practical installation. A more informative diagram is shown in Figure 3. Transmitting Antenna The antenna mast is located on the roof of the vehicle Transmitter Site ALC Loop Coaxial Cable Optional Battery Microphone RF Out RF Out 4W Max. 6 GHz Power Amp 6 GHz Carry-Coder II Video Camera Receive Site Receiving Antenna 6GHz Decoder II Antenna Mast Coaxial Cable Control Unit Power Supply Figure 3 Typical system of 6GHz Carry-Coder II with power amplifier The output of the 6GHz power amplifier is directed to the transmitting antenna located on a mast. The mast is positioned on the rooftop of a mobile vehicle. The receiver antenna can also be located on a mast to result a better coverage over longer distance. Broadcast Microwave Services, Inc. – 12367 Crosthwaite Circle – Poway, CA 92064 Phone: 800-669-9667, 1-858-391-3050 - Fax: 1-858-391-3049 Email: support@bms-inc.com Web: www.bms-inc.com
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