Digital Modulators

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QAM Modulator
DQM-1903ML

AS a QAM modulator, it shows professional performance for received transport stream signal to output as frequency band for suitable CATV band transmission. It is also easy to select frequency band via front control panel.

· Hi-dense modulating for QAM(Annex A, B and C)
· Advanced coding as ITU-T(J.83) Annex A, B and C
· Cost effective with simple set-up and operation
· Hybrid AMP integrated
· 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
 

Digital Input

 

Transport Stream

ASI

Connector

BNC (75)

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

75

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

 

VHF -103 dB@20KHz

Adjacent Channel Carrier

Attenuation Characteristic

45 dB (Out-of-band)

Spurious

 -63 dB

Return Loss

 15 dB

Group Delay

±2 0ns

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

 

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