The document introduces the test functions of MO-170 DVB-T modulator, including signal level alignment and in-band noise measurement, test transport stream, high MER COFDM signal power measurement, getting the correct BER
The MO-170 is a multi‑purpose DVB‑T/DVB‑H modulator that provides a complete test suite for measuring various points in a digital terrestrial TV signal chain. It offers internally generated test transport streams, carrier blanking, single‑carrier generation, and controlled insertion of errored bits to emulate specific BER conditions.
Additional features include selectable white Gaussian noise, up to six‑tap multipath channel simulation, frequency agility of 1 Hz steps, and user‑selectable channel bandwidths of 6, 7, or 8 MHz. The device can operate in master/slave and hierarchical modes, and it provides precise C/N control from 3 dB to 40 dB in 0.1 dB steps.
| MER | 19.3 dB |
|---|---|
| C/N range | 3 dB to 40 dB (0.1 dB steps) |
| Channel bandwidths | 6, 7, 8 MHz (user‑selectable) |
| Frequency agility | 1 Hz step |
| Output power | 66.8 dBpV |
The MO‑170 can generate an internal test transport stream, perform carrier blanking, generate a single carrier, and insert errored bits to emulate a given BER.
It can add white Gaussian noise with selectable C/N values, allowing noise levels from 3 dB to 40 dB in fine steps.
The device supports user‑selectable channel bandwidths of 6 MHz, 7 MHz, and 8 MHz.