Netcom’s 5556 is a digitally tunable filter covering the frequency range of 1.5 to 4MHz. The filter has been designed using new commercially available high voltage drivers and a new generation CPLD, which allows for improved performance and reduced cost while at the same time providing increased functionality.  A control interference is provided to accept either parallel data and strobe or serial data, clock and strobe.  The filter incorporates high voltage totem-pole drivers for the PIN diode bias voltage to minimize current draw from the 100 VDC supply.


  • Specifications
  • Performance
  • Mechanical
  • Ordering Information
  • Evaluation
Frequency Range 1.5 to 4 MHz
Input / Output Impedance 50 Ω
RF Power Rating
       Inband, Continuous / Peak 0.1 W / 0.4 W
       Out-of-Band, Max 5 W
Filter Bandwidth 3dB 7%
       Shape Factor 30/3dB 5.3
Insertion Loss (typical) 2.5 dB
Tuning Channels 250
Switching Speed, 90% RF Power 150µsec
DC Inputs
      +5 Volts (±0.5 Volts) 250 mA
      +100 Volts (-7, +25 Volts) 0.5 mA
Temperature Range -40 to +85°C
Control Interface – Selectable 8 bit Parallel or Serial

– TTL and CMOS Compatible

Power Save Mode Programmable
Dimensions 2.30 x 1.40 x 0.55 inches


Ordering Information