Ad831 Hf Transceiver Code To Your

Compared to mixer without amplifier.,It not only eliminates the need for large power local oscillator drive,And avoid the large power of the vibration caused by the mask, Isolation and other issues,Thus greatly reducing the cost of the systemAD831;Both the local oscillator and the RF input frequency can be achieved.500MHz,If there are two kinds of intermediate frequency output differential current output and single ended voltage output,In the use of differential current output,Output frequency up to250MHz;When the single ended voltage output is used,Output frequency is greater than200MHz.AD831The dual power supply can be used with a single power supply, Dual power supply all the ports can be used for DC coupling,Thus, the power consumption of the power supply can be controlled by the peripheral circuit according to the needs of the users.Shielded enclosure Anti back protection diode.

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Ad831 Hf Transceiver Code To Your

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It has built in frequency counter voltage meter, 6dB 12dB receiving attenuator, 2W AF amplifier as well as SWRPWR meter.

The two-mixer 1 XTAL filter design uses the 1st mixer as front-end mixer on receive as well as SSB modulator on transmit.

The second mixer is used as SSB product detector on receive and as a heterodyne mixer on transmit.

VFO and BFO are cross-switched between both mixers with a PIN diode matrix.

Between 1st mixers output and 2nd mixers input a crystal filter is placed, followed by an AGC PIN attenuator.

AFRF passive splitter (combiner) takes care about the proper separation of AF and RF signals at the 2nd mixers output as well as combining them at the 1st mixers input.

The antenna switching between receiver and transceiver is done by a single 1N4007 diode.

Both implemented mixers are AD831 type, XTAL filter is made of six 6,400 MHz crystal units and has approx.

With the activated PTT button you are on-air in phone mode, if you push the KEY, you are on-air CW.

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