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120 DSP Operation Manual
Basic Signal Level Meter
120
Level Measurements
When testing or troubleshooting within your analog, digital or mixed analog/digital
transmission system, the 120 DSP makes the perfect tool for measuring the power levels of
all of your analog and digital QAM carriers.
Additionally, for QAM carriers (including deep interleave) the 120 DSP provides
Constellation, Equalizer Tap, MER and BER measurement displays. This allows users to
quickly analyze 64 and 256 QAM downstream channels for quality verifications or to locate
impairments with the meter, all right out of the box.
Channel Plan Scan
With it’s channel plan scan feature, the 120 DSP can also display the frequency response
of the entire channel lineup. This measurement displays a color-coded bar graph of each
channel or your favorite channels in the active channel plan. The channel plan scan also
includes on-screen markers that can be adjusted to perform a tilt measurement.
Spectrum Measurements
The 120 DSP comes standard with the ability to display the the full return spectrum from
4 to 110 MHz. The spectrum display provides peak measurements, color-coded markers,
and delta measurements. This feature also includes adjustable detector modes which are
useful for capturing bursty transient noise. Optionally, the 120 DSP can also be equipped to
perform forward spectrum measurements from 50 MHz to 1000 MHz.
Simple Yet Powerful
Providing the widest range of functions for an installer available today (as standard
options), the 120 DSP includes virtually all the testing options an installer or service
technician needs to verify service quality and easily identify and fix problems in the field.
•
User-Defined Tests
• Multi-language Support
• Create Work Orders Right on the Meter
• Interactive Basic RF Installation Process
• Flexible Data Storage & Setup
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