4. Introducing Test Instrument for Digital Terrestrial Broadcasting
Digital Terrestrial Broadcasting Signal Generator
ISDB-T SIGNAL GENERATOR LG 3802
The LG 3802 ISDB-T Signal Generator with the OFDM capability conforms to Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) standards for digital terrestrial TV system in Japan. This instrument features a channel coding/modulation, C/N generator, and up converter in a single package. Consequently, the modulated signal covering VHF and UHF channels can be output. Since a pseudo random signal source (PN) and BER counter are provided, the BER measurement of a TV set and tuner can be performed with this model only. In addition to the internal TS signal, the MPEG2-TS can be externally applied. Therefore, the receiver can be checked visually and acoustically by using the existing TS. With such versatile capabilities, overall functions of the reception system can be tested.
8VSB/QAM SIGNAL GENERATOR LG 3803
Designed to address the challenges of DTV tuner testing, the LG 3803 provides all of the signal control necessary for testing the performance of ATSC compliant tuners and receivers.
The RF output can be set to emulate 8VSB, 64 and 256QAM modulation formats and the modulation frequency can be set from 50 MHz to 900 MHz covering the entire VHF and UHF spectrum. Output level ranges from -100 to +13dBm (50 Ohm) and it is settable with 0.1dB resolution; ideal for doing input sensitivity tests.
A pseudo-random (PN) generator and a BER counter are built into the instrument and facilitate easy BER measurements in a single unit.
The instrument can be modulated internally (3 built in test patterns; color bars and monoscope) or can be externally modulated (DVB-ASI or SPI input). An optional DVD drive is available to supply moving video playback for HD rates (factory option 70); an excellent way to test receivers in a "real life" simulation.
The QVGA display provides easy instrument control. The instrument can be Ethernet controlled. Remote control allows preset recall and increment; up to 100 presets can be set up and recalled aiding in the automatic testing process.
DVB-T SIGNAL GENERATOR LG 3804
Designed to address the challenges of DTV tuner testing, the LG 3804 provides all of the signal control necessary for testing the performance of DVB-T compliant tuners and receivers.
Consequently, the modulated signal covering VHF and UHF channels can be output.
Since a pseudo random signal source (PN) and BER counter are provided, the BER measurement of a TV set and tuner can be performed with this model only.
In addition to the internal TS signal, the MPEG-2 TS can be externally applied. Therefore, the receiver can be checked visually and acoustically by using the existing TS. With such versatile capabilities, overall functions of the reception system can be tested.
This basic model can expand applicable capabilities to DVB-C and DVB-H with various Options.
TV Signal Level Meter
SIGNAL LEVEL METER LF 941D
The Model LF 941D TV Signal Level Meter enables speedy and accurate measurement of VHF/UHF TV and CATV signals.
This level meter can measure levels of digital broadcast signals as well as conventional analog broadcast signals.
Since ten programmable channels are provided to store arbitrary frequencies, a pilot signal, FM broadcast signals, and frequently used frequencies can be stored.
The large digital display for level readout and bar-graph level indicator for antenna installation enhance speedy and accurate level measurements.
This compact & lightweight level meter is ideal for VHF/UHF antenna and CATV installations.
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