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Available Options:
A. Internal DC-DC Converter (Eliminates need for high voltage supply. Requires additional 500 mA of 5 VDC current) B. Serial Interface C. Custom Frequency Bands (Specify START and STOP frequencies in MHz) F. Filtered D-connector
NOTE(S): 1) Options may be limited to particular frequency bands and/or performance levels. Consult factory for your application. 2) Filters are aligned and tested using a High Bias of +100 VDC unless otherwise specified by the customer.
Interface and Control Notes:
Frequency Tuning Address
Maxi-Pole Series filters utilize an eight-bit scheme for tune words to digitally control tuning of the center frequency. For further information on how to calculate tune words, please see the Frequency Tuning Address Application Note.
Bias Voltage Requirement
A bias voltage is required to reverse bias the PIN diodes used to tune the filter. Very little static current (less than 1 mA) is needed. A minimum of 30 Volts is recommended for proper filter operation, although is some instances voltages as low as 12 Volts will provide acceptable performance. As this voltage is increased, the power handling capability and intermodulation are improved as shown below. A bias voltage of +100 VDC is recommended for best results, and all filters are tuned and aligned this way from the factory unless otherwise specified by the customer. An internal low EMI supply, powered from the +5 VDC input, is available as an option. |