The Model 4421 dual synthesized L-band to 70 MHz downconverter is specifically designed for use with phase locked loop LNBs. The frequency stability and phase noise characteristics of the Model 4421 downconverter are ideal for compressed digital audio carriers. The superior phase noise characteristics of the Model 4421 facilitate data rates as low as 19.2 kbps.
Input Frequency950 - 1450 MHz
Output Frequency52 to 88 MHz
Input Impedance75 ohm
Output Impedance50 ohm
Gain25 dB, maximum
Level Stability±2 dB, maximum
Frequency Stability 2 ppm
Phase Noise>70dB/Hz, 1 kHz from carrier
Image Rejection>40 dB over input frequency range
Frequency TuningTransponder 1 - 24
IF Level AdjustFront panel
IndicatorsLED for loss-of-lock, Sum alarm, Local/Remote Mode
Alarm OutputForm C, relay (LNB Power)
Input ConnectorType-F, Female, 75 ohm
Output ConnectorType-BNC, Female, 50 ohms
LNB Power+22 VDC, on input connector(strippable in/out)
Primary Power90 - 260 VAC, 50 - 60 Hz, 45 watts max.
Dimensions1 RU, 19" x 12" x 1.75"
Operating Temperature-10º to +40º C
Model 4421 Monitor and Control:
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