Microyal Model 3000MC

750MHz Broadcast-Grade Adjacent Modulator

Microyal-3000MC is fixed-channel modulator with IF modulation, both video and audio carriers are PLL controlled to ensure accuracy and stability. It is also constructed with proprietary SAW filter that can provide true VSB response feature, the spurious harmonic lower than 60dB. A single-channel amplifier is designed to output 120dBμV RF level, and IF loop-through is available on rear panel, so it is good for large and medium size CATV headend system.

Features:

  • Built-in SAW filter
  • Two PLL Synthesized Channel control
  • External IF Loop-Through easy connect to any Scrambler
  • Spurious Harmonic low than 60 dB
  • 120 dBμV RF Output Capability Low Distortion Products
  • Built-in Grade SAW Vestigial Sideband Filter Assure Performance

Specifications:

RF

  

Output Frequency Range

47MHz~750MHz Fixed Channel Output,
(PAL D or PAL B/G)

Output Level

120dBμV

Output Level Range

0～-20dB (Adjustable)

Video/Audio Carrier Power Ratio

10～20dB (Adjustable)

Output Impedance

75Ω

Spurious Harmonics

≥60dB

Frequency Accuracy

≤±5KHz（VHF）；≤10KHz（UHF)

Video

  

Input Level

1.0Vp-p for 87.5% Mod.

Input Impedance

75Ω

Differential Gain

≤5%@ 87.5% Modulation index

Differential Phase

≤5°@ 87.5% Modulation index

C/L Delay

≤45 ns

Frequency Response

≤2dB

Modulation Range

0～90% (Adjustable)

Video S/N Ratio

≥55dB

IF

  

IF Frequency

38MHz(PAL D)

IF input and output level

90dBμV

Video

  

Input Level

1.0Vp-p for 87.5% Mod.

Input Impedance

75Ω

Differential Gain

≤3%@ 87.5% Modulation index

Differential Phase

≤3°@ 87.5% Modulation index

C/L Delay

≤45 ns

Frequency Response

≤1dB

Modulation Range

0～90% (Adjustable)

Video S/N Ratio

≥55dB

Audio

  
Audio Input Level

≥0.5Vp-p（for ±50KHz Dev.）

Audio Harmonic Distortion

0.5%

Audio Frequency Response

±1dB
Frequency

6.5MHz±2KHz (PAL D);5.5MHz±2KHz(PAL B/G)

Input Impedance

600Ω

Audio S/N Ratio

60dB
Audio Pre-emphasis 50μs
General  

Operation Temperature

0～40°C

Relative Humidity

≤85%

Atmospheric Pressure

86~106Kpa

Power Supply

220V±10%, 50Hz±2Hz, <18W

Dimensions

483mm×320mm×45mm

Weight

3.8Kg