Power Amplifier Unit,NAH-310/320 Series for Terrestrial Digital TV Broadcasting

  • Digital TV Broadcasting

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Image:NAH-311

10W Power Amplifier Unit, NAH-311

Image:NAH-324

300W Power Amplifier Unit, NAH-324

The NAH-310/320 series is a low-distortion power amplifier unit developed for terrestrial digital TV broadcasting.
The distortion compensation system is available two types, the feed forward distortion compensation system (for NAH-310 series) and the pre-distortion compensation system combined with a pre-corrector (for NAH-320 series).

FEATURES

Feed forward distortion compensation

Image:Principle of Pre - distortion Compensation

  • The intermodulation products due to nonlinear distortion are suppressed to -50dB or less.
  • Any radiation out of the band is suppressed, giving no interference on adjacent channels.
  • The distortion compensation circuit is stabilized in operation using the JRC Patented high-speed automatic analog control sequence.

Pre-distortion compensation

Image:Principle of Pre - distortion Compensation

  • The pre-distortion compensation operates in combination with the external pre-corrector.
  • The intermodulation products due to nonlinear distortion are suppressed to -50dB.
  • The radiation out of the band is suppressed, giving no interference on adjacent channels.
  • The distortion compensation circuit is stabilized in operation using the feed-back system with digital signal processing.

Stand-by system

The stand-by system is available in the N+1 system and the parallel running system

Compact design

The equipment incorporates the power supply modules and a cooling fan (10W/30W), ensuring compact equipment.

SPECIFICATION

Series NAH-310 series NAH-320 series
Distortion compensation Feed-forward Pre-distortion
Frequency band UHF TV band UHF TV band
Intermodulation products Better than -50dB Better than -50dB
(with pre-corrector)
Output power 10W 30W 100W 150W 300W
Cooling system cooling
(with built-in fan)
Air
cooling
Air cooling Water cooling
Dimensions (mm) W 329 379 390 350 350
H 104 104 120 104 83
D 360 450 600 600 600