A jamming wave generator capable of conducting adjacent interference tests and co-channel interference tests for terrestrial digital broadcasting (ISDB-T). It can generate up to 8 jamming waves.
This device is a signal generator that simultaneously generates OFDM waves corresponding to adjacent 8 channels in the ISDB-T MODE 3 format. Each of the 8 output waves can be set for TV channel steps from 90 MHz to 770 MHz. Each output wave can be generated independently. The output level for each can be varied from -50 dBm to -10 dBm (in 1 dB steps). It has a built-in synthesizer for external RF input signals, allowing for the combined output of analog and digital signal waves. By connecting the modulator outputs of our models 3529A/3532B/3511C to this external RF input signal, it is possible to measure the effects of adjacent waves. The OFDM generation section outputs 8 waves processed to ensure that their peaks do not align at the same time, using an OFDM wave with a center frequency of 37.15 MHz. It satisfies the spectral mask of broadcasting standards and cyclically outputs signals with a guard ratio of 1/16 and 8 symbols. This device is ideal for testing adjacent interference waves.
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basic information
**Features** - Generates eight OFDM waves simultaneously. - Each OFDM wave is generated independently. - Each output frequency can be set in TV channel steps from 90 MHz to 770 MHz, with an offset of 1/7 MHz applied to the center frequency of the output channel. - Each output level is variable from -50 dBm to -10 dBm (1 dB steps). - Individual outputs can be turned ON/OFF. - Equipped with a synthesizer to combine external RF signals. - Multiple units can be combined to generate multi-wave OFDM signals. - Output impedance is 75Ω. - Easy operation via key controls on the front panel and an LCD display.
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Applications/Examples of results
This is an interference wave generator capable of conducting adjacent channel interference tests and co-channel interference tests for terrestrial digital broadcasting (ISDB-T), making it ideal for the development and production of TVs and tuners for terrestrial digital broadcasting.
Company information
We are a development-oriented technology company celebrating our 48th anniversary, with 80% of our employees being engineers. We handle everything from development and design to production and sales (with overseas sales through agents) independently. Our direct subsidiary, Elena Electronics Co., Ltd., is involved in the manufacturing and sales of measurement instruments related to electromagnetic waves, while our affiliated company, Koyo Measuring Instruments Co., Ltd., specializes in assembly and wiring, leveraging its expertise. Under the digital revolution, we are a specialized company developing transmission equipment and AV devices that transcend the boundaries of broadcasting and telecommunications, as well as testing signal and measurement instruments, and centralized signal equipment for factory production. Since our founding, we have honed our high-frequency, analog, and digital technologies ahead of the times, and our products are active in the broadcasting and telecommunications fields in over 30 countries worldwide, including satellite broadcasting, terrestrial broadcasting, mobile communications, optical communications, and CATV. We are fully equipped to respond to the digitalization of TV broadcasting worldwide, not only developing and producing TV test signal generators and measuring instruments, and field reproduction test equipment, but also in recent years, developing and producing area one-segment related devices, in-house/self-broadcasting, and digital signage related equipment. Moving forward, we intend to leverage our accumulated technological capabilities to introduce high-value-added products in various fields.
