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Related Manuals for ROM Elektronik HFA-3
Summary of Contents for ROM Elektronik HFA-3
- Page 1 ROM-Elektronik GmbH RF-Analyzer HFA-3 µ Manual elektronik...
- Page 2 "All-pass", since the frequency range (GSM900, GSM1800 or 3G (UMTS)) is generally known in this case. The operation of the HFA-3 is simple. We have given this the highest priority value! Through our long-standing experience in RF measuring device construc- tion, with support from the University of the German Armed Forces, Munich, our "large"...
- Page 3 Dimensions: 85mm x 117mm x 55mm Functions: Adjustable volume Never bring to the HFA-3 in contact with water! Do not use in the rain. The Weight: Approx. 300 g sensitive electronics can be damaged. Power supply: 9V block battery Current consumption: max.
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Page 4: Operational Startup
Should you require assistance in the application of the device, then you can reach us under Fax No.: 08282-7305 or Tel.: 08282-7385 with operational que- stions concerning the device. Screw the supplied logper antenna onto the HFA-3 where appropriate, tighten with a tool. Installation of the antenna with tuning assistance... - Page 5 If the text "Wait until it can be read ... then press x" can be read off without A volume control is located on the front panel of the HFA-3. The volume of error, then please activate the key "X" on the PC keyboard. The correct the built-in loudspeaker can be adjusted here and/or optionally using plug- baud rate is now set adjusted and stored permanently.
- Page 6 After a click on OK, the first data can be sent to the PC. The HFA-3 has a built-in filter bank in order to carry out the measurement for individual frequency ranges only. The filters are set adjusted to fixed fre- quencies.
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Page 7: Frequency Filters
ROM-Elektronik GmbH ROM-Elektronik GmbH ween the different functions of the HFA-3. left pushbutton right pushbutton Table of the function on activating the pushbuttons left right Function pushbutton pushbutton push Peak value storage (PeakHold) On/Off switching push RF filter stored cyclically at every actuation... - Page 8 (mV/m) or in radiant flux density (µW/m ). The unit is changed In order to save the data on a PC (long-term recording), the HFA-3 is to be as follows: connected with a free serial interface using the cable supplied (if option has 65.4 mV/m...
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Page 9: Configuration Of The Data Logger
Through pressing the right-hand pushbutton (RT), change into the data log- ~H0000.TMP: Header file ger menu. ” DatenLog. ~A0000.TMP: Measurement file zyklisch In the case of a program crash, a valid file HFA-3 can be generated from these files where Seite 9 Seite 44... - Page 10 ROM-Elektronik GmbH ROM-Elektronik GmbH With every press on the left-hand pushbutton (LT), the arrow changes bet- ween both options and the data logger (Data Log.) and the filter rotation (cyclical) is activated or deactivated. Whether the data logger and/or the filter rotation is activated can be identified on the "<"...
- Page 11 ROM-Elektronik GmbH The filter areas are color coded in the measurement curve (frequencies: The HFA-3 has a fixed integrated peak value recording and displays the e.g. GSM900). The color codes are indicated near the text fields of the ma- non-pulsed value and pulsed value simultaneously in the display! ximum values.
- Page 12 It is therefore sufficient to measure one variable in order to be able to de- termine all others as well. Very frequently it is the radiant flux density S that is measured. Our HFA-3 measures the component of the electrical field Display indication: Power flux density S, Mode: manual strength! The peak values of a measurement are recorded exclusively.
- Page 13 ROM-Elektronik GmbH and begins always with the all-pass network filter (independent of what The measuring range of the HFA-3 extends from approx. 6 mV/m to 2000 was adjusted prior to the start of the measurement). mV/m or from 0.1 µW/m to 10,000 µW/m...
- Page 14 0,016 16,29 Included in the scope of delivery of the HFA-3 is a logarithmic- periodic an- tenna (logper antenna) for the frequency range 900 MHz to 2.6 GHz, for fi- nancial reasons in the form of a printed circuit board! With this, the Anzeige Display, Feldstärke E, Modus: automatisch...
- Page 15 Wavelength Velocity of light (=300,000 km/s) Frequency With the HFA-3 the electrical field strength E can be measured in mV/m and the radiant flux density S in µW/m and converted back and forth with the formula (3). Prerequisite, however, is that the effective surface area of the antenna is known.
- Page 16 Selection list: Filter ger. The RF analyzer HFA-3 has been developed for this purpose. It consists of a very sensitive RF power measuring device (detector). Since the detec- In this selection list are listed the available recording duration for the long-term recording.
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Page 17: Selection List
In case of a broadband measuring device, such as the HFA-3, on the other In case of most computers, the serial interface is con- hand, the fault must be taken into consideration. - Page 18 ROM-Elektronik GmbH ROM-Elektronik GmbH are registered correctly. When we consider the frequency range 600 MHz Alternatively a measurement can be stored by klicking to 2600 MHz, the uncertainty of measurement is still within ±6dB. In practice this symbol. This symbol is only active in long term stora- this means that, in all-pass operation (= broadband), 3G (UMTS) and WLAN signals can be somewhat undervalued, therefore a measured value is dis- played which is too small.
- Page 19 GSM900 frequencies. At an assumed point of measurement, GSM900- and GSM1800 frequencies Menuleiste: Bearbeiten are present. In the case of the HFA-3, we set the filter to GSM900 (because Terminal: Direct display of the raw infor- e.g. only GSM900 interests us)! mation from the HFA-3.
- Page 20 ROM-Elektronik GmbH ROM-Elektronik GmbH Polarisation Operating elements and displays If we consider the electrical field component of an electromagnetic wave, The operation of the HFA3 1.0 software is possible via the menu bar, com- it is determined that this is in one plane. This plane is also designated as a mand buttons and icons.
- Page 21 ROM-Elektronik GmbH ROM-Elektronik GmbH After the start of the program, the start display screen appears (see Illustra- tion). After approx. 5 seconds, the actual program then starts. The actual program is started without further delay by a mouse click on the command button "Continue".
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Page 22: Starting The Program
¥¥¥¥¥¥¥¥¥¥¥¥ HFA3_10.exe. Subdirectory "Recording": Here are filed the files of the recordings. Please switch off the HFA-3 immediately, in order to avoid damage to the HFA-3. Starting the program Notes on the antenna Because of the many different PC configurations, the operational startup is not always completely problem-free. - Page 23 If measured values above 2000 mV/m and/or 10 mW/m are received ("MAX!" display in the HFA-3), screening measures are certainly to be recom- mended. Possibly a precise measurement through a specialist should also be recommended here, in order to obtain clarity about the actual loading (strength, frequency, modulation, etc.).
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Page 24: Technical Appendix
(connection over sound card and PC), or as an ac- cessory unit, such as e.g. our ADC appliance series. Step 1 of the installation (destination) Options The HFA-3 can be supplied serial interface connector with a recorder outlet (0-2.5V) and/or RS232 serial computer interface. -
Page 25: Installation
ROM-Elektronik GmbH .Continue the installation in Step 3 with "Continue >" and enter your perso- Important notes on the HFA-3 software There are many different operating systems and PC configurations. In case of most PC's, the installation of the program and the opera- tional startup functions smoothly. - Page 26 ROM-Elektronik GmbH ROM-Elektronik GmbH betic character other than d: for your compact disk drive). Following this, you are guided by the individual steps of the installation. Step 2 of the installation Step 1 of the installation (start) Seite 27 Seite 26...
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