• Description
  • Specifications
  • Ordering Info


The DVM-1903ML VHF/UHF 8-VSB (ATSC) Digital Modulator offers a combination of features and reliability.

It complies with ATSC A53 standard for 8-VSB (ATSC) modulation for terrestrial HDTV broadcasting and is applicable for HDTV and SDTV broadcasting.

The DVM-1903ML can be used as a DTV broadcast modulator, tester, or a head end of an RF distribution network.
It can accept input through its DVB-ASI and SMPTE-310M (optional) input ports.

The modulator includes internal high quality up-converter with variable output between 54 and 870 MHz covering full VHF and UHF band.

The DVM-1903ML is very easy to control with front panel.
It provides outstanding and reliable output at a reasonable price for customers.


  • ATSC A.53 8-VSB Compliant
  • DVB-ASI Input
  • SMPTE-310M Input (optional)
  • Bandwidth: 6Mhz
  • Output Level: 55 +/- 5 dBmV
  • Level Control Range: 0 ~  -15 dB
  • Adjustable output frequency: 54-870 MHz
  • PCR Re-stamping
  • Front panel control

DVM-1903ML - 8-VSB (ATSC) Digital Modulator


Digital Input
Transport Stream DVB-ASI
Connector BNC (75Ω)
Coding ITU-T (J.83) Annex D
Bit Rate 19.393 Mbps
Packet Format 188Byte
Symbol Rate 10.762 Msymbol/s
Modulation 8-VSB
RF Output
Frequency Range 54~870MHz
Impedance 75Ω
Output Level 55 ± 5 dBmV
Level Control Range 0~-15dB
Bandwidth 6MHz
MER  After Equalizer 42 dB
MER  Before Equalizer 37 dB
Phase Noise VHF -105 dB@20KHz
VHF -103 dB@20KHz
Adjacent Channel
Carrier Attenuation
≥ 45 dB (Out-of-band)
Spurious  ≤-63 dB
Return Loss  ≥17 dB
Group Delay ±2 0ns
Frequency Response ± 0.5dB
Frequency Tolerance ±2ppm
PCR  Jitter ≤ ± 200 ns
Power Requirements AC 90~230V, 50/60Hz
Power Consumption 13W
Weight 3Kg
Dimensions 482 x 44 x 383 mm

Ordering Info

DVM-1903ML   –   8-VSB (ATSC) Modulator