Netcom’s 5702 is a tunable filter covering the frequency range of 1.5MHz to 30MHz.

This 1.5-30MHz LRU filter has been designed using three bands of tunable filters. This tri-band filter is offered in a mechanical package to support applications where compact design, power requirements, and mechanical installation flexibility are important. It meets the vibration and shock requirements of systems used in ground-mobile and airborne environments.

  • Specifications
  • Performance
  • Mechanical
  • Serial Address
  • More Details

The following table shows the typical performance of the filter at a bandwidth of 5.3%. Options are available upon request for different bandwidths.

Frequency Range 1.5 to 30 MHz
BW (Typical) 5.3%
Impedance (Input /Output) – Typical 50 Ω
Fc + 10% Selectivity – Typical < -19dBc
2Fc < -60dBc
Tuning Speed < 200 µs
Insertion Loss Typical 3.5 dB
Insertion Loss Max 4.5 dB
Return Loss Min 8.5 dB
Tuning Channels
1.5MHz- 4MHz 250
4.0MHz– 10MHz 249
10MHz– 30MHz 249
RF Input Power (P1dB)
1.5MHz to 4MHz 20dBm
4MHz to 10MHz 27dBm
10MHz to 30MHz 28dBm
In Band Power Handing Max 30dBm
Out of Band Power Handing 33dBm
1.5MHz to 4MHz 31dBm
4MHz to 10MHz 38dBm
10MHz to 30MHz 39dBm
Vcc Range 6.0V to 15.0V
DC Current Max 275mA
Operating Temperature Range -40 to +85°C
Control Interface SPI Interface
Dimensions [L x W x H] 5.50 x 4.00 x 1.966 inches
139.70 x 101.60 x 49.92 mm

Insertion Loss

10% Rejection

Band Switch Table

Band B1 B0 Frequency Range
1 0 0 1.50MHz – 4.00MHz
2 0 1 4.02MHz – 10.00MHz
3 1 0 10.08MHz – 30.00MHz
Illegal Selection 1 1 Do Not Select

Address Table



Connector Pin Out (DB15 Male)

2 NC
3 NC
4 NC
5 NC
6 NC
8 VCC (6V to 15V)
10 NC
11 GND
12 GND
Serial Address

Serial Address Input Timing Diagram

When the SPI_CS line is shifted low, the Tune_Ready line will go high indicating the unit is ready to accept the tune word. Tuning of the filter starts when the last data clock (16th) pulse of the address is sent to the unit while the SPI_CS (Chip Select) is low. While the filter is processing the tune word request, The Tune_Ready Line will be low. When the filter tuning is complete the Tune_Ready line will go high to indicate the filter tuning is complete. Reset the SPI_CS line high after sending the 16th clock bit to allow the unit to reset after the filter tuning is complete.

Note: Monitoring of Tune_Ready line is not required.

Symbol Parameter Min Max Units
tSS Setup time MOSI Data to SPICLK 50 ns
tu Hold Time MOSI Data From SPICLK 0 ns
tCH Clock High Time 125 ns
tCP Clock Period 250 ns
tCS Chip Setup Time (CS falling edge to SPICLK start) 125 ns
tTR Tune_Ready indicator 200 us
tACC Access time from Last (16th) SPICLK edge to Fo 200 us
Maximum Hop Rate Tune Frequency to next Tuned Frequency 500 Hz

Bit Map

More Details

Environmental Specification Standards


  • High temperature shall meet MIL-STD-810E, Method 501.3, Procedure I to 85°C storage, and procedure II to 85°C operating.
  • Low temperature shall meet Method 502.3, Procedure I to -57°C storage, and Procedure II to -40°C operating.


  • MIL-STD-810E Method 514.4 Ground Mobile Test Procedure I, Test Condition I – 3.4.7


  • MIL-STD-810E Procedure I, Method 516.4 – Functional Shock.


  • None

MSL (Moisture Sensitivity Level):

  • Level 0