Optional licenses are available for use with SMD 989 and enable additional unit functionality. One license is required for each modulator module.
SMD 963H is a Multistream/VCM Modulation License for the SMD 989. This license adds DVB-S2 Multi-Stream/VCM capapbilities. SMD 963H requires SMD 910 and either SMD 962 or SMD 964.