DigitalDevices RESI DVB-C Modulator

The RESI, a DVB-C modulator by Digital Devices, outputs a DVB-C compatible data stream into an existing 75-ohm coaxial cabling.

Technical specifications:

• 4 - 24 Transponder according to DVB-C specification
• Frequency range: 114 – 858 MHz
• Symbol rates: 1,0 – 7,1 MSym/s
• QAM: 16, 32, 64, 128, 256
• Signal / Noise ratio: 42dB
• Output with 8 channels (per channel): 101 dBµV

Find modulator in system

Use our guide to Install DigitalDevices driver.

Use the following command to find the adapter number and the modulator device number:

find "/dev/dvb" -name "mod*"

The output will display a list of devices in the system:

/dev/dvb/adapter0/mod0
/dev/dvb/adapter0/mod1

• adapter0 - adapter number
• mod1 - device (modulator) number

Astra settings

1. Prepare MPTS for modulator
2. In the output setting, specify the address: resi://#adapter=0&device=1 (0 - adapter number, 1 - modulator)
3. In the MPTS NIT settings, configure transponder options

Read more in: Cable Television with Astra for Hospitality Industry

Additional options

• gain=N - signal level in range from 0 to 100
• buffer_size=N - buffer size in megabytes. Default: 256
• legacy - compatibility mode with old RESI modulator for 10 transpodners

Troubleshooting

No such file or directory

If you attempt to find the adapter number and encounter an error:

find: ‘/dev/dvb’: No such file or directory

it is likely that the DigitalDevices driver is not installed. Please Install DigitalDevices driver