The Anttron TMX4KL modulator converts the signal from an HDMI device into a DVB-T/C RF output for distribution over an existing coaxial network. The generated channel appears alongside the other digital terrestrial channels, with a resolution of up to 1080p. The HDMI loop output preserves the source signal at 4K resolution for connection to a display, while the RF Bypass allows existing antenna signals to pass through.

Settings are configured via a menu using 3 buttons and a 2×16-character LCD. PAT, PMT, SDT and NIT tables are supported, along with configuration of the channel and network names, SID, LCN, TSID, ONID, NID, and audio and video PIDs.

• Video input: HDMI
• Resolution modes: 480p, 576p, 720p, 1080i, 1080p
• HDMI loop resolution: 4K
• Video compression: H.264, bitrate 5–15 Mb/s
• Audio input: HDMI
• Audio sampling rate: 32 kHz, 44.1 kHz, 48 kHz
• Audio compression: AAC-LC / MPEG1-L2, bitrate 128–384 Kb/s
• SI tables: PAT, PMT, SDT, NIT
• Output: DVB-T/C RF
• Output frequency: 170–230 MHz and 470–862 MHz
• Output level: > 85 dBμV
• Constellation: QPSK / 16QAM / 64QAM
• FEC: 1/2, 2/3, 3/4, 5/6, 7/8
• Guard interval: 1/4, 1/8, 1/16, 1/32
• Mode: 2K / 8K
• MER: 34 dB
• Power connection: DC 2.1 mm, +5 V
• Power consumption: 5 W
• Package contents: Modulator, power supply, user manual