Description
The DQM-1903ML QAM Modulator offers a combination of features and reliability. It complies with the standard ITU-T(J.83) Annex A, B, C and is applicable for HDTV and SDTV broadcasting.
The DQM-1903 can be used as a DTV broadcast modulator, tester, or a head end of an RF distribution network.
The modulator includes internal high quality up-converter with variable output between 54 and 870 MHz covering full VHF and UHF band.
The DQM-1903ML is very easy to control via front panel. It provides outstanding and reliable output at a reasonable price for customers.
FEATURES
- ASI input transport stream
- Excellent RF output
- Supports QAM modulation
- Supports PCR re-stamping function
- User adjustable output level and frequency
- Front panel control
- QAM Modulation setting (64, 256QAM)
- PCR Jitter: ≤ ±200 ns
- Group Delay as ±20 ns
- MER After Equalizer: 42dB
- Phase Noise: VHF -105 dB@20KHz, UHF -103 dB@20KHz
- Frequency: 54 ~ 870MHz
- Output Level: 55±5 dBmV
- Spurious: ≤-63dB
Specifications
Digital Input
Transport Stream ASI
Connector BNC (75Ω)
Coding ITU-T (J.83) Annex A, B and C
Bit Rate 1~52 Mbps
Packet Format 188 Byte
Symbol Rate 1~7Mbps
Modulation 64,256 QAM
RF Output
Frequency Range 54~870MHz
Impedance 75Ω
Output Level 55 ±5 dBmV
Level Control Range 0~-15dB
Bandwidth 6MHz : Annex B and C, 8MHz : Annex A
MER After Equalizer 42 dB
MER Before Equalizer 37 dB
Phase Noise VHF -105 dB@20KHz, UHF -103dB@20KHz
Adjacent Channel Carrier
Attenuation Characteristic ≥ 45 dB (Out-of-band)
Spurious ≤ -63 dB
Return Loss ≥ 15 dB
Group Delay ±20ns
Frequency Response ±0.5dB
Frequency Tolerance ±2ppm
PCR Jitter ≤ ±200 ns
General
Power Requirements AC 90~230V, 50/60Hz
Power Consumption 13W
Weight 3Kg
Dimensions 482 x 44 x 383 mm
Ordering info
DQM-1903ML – QAM modulator with ASI input, RF output