Schematic questions

The operation of transmitters designed to jam or block wireless communications is a violation of the Communications Act of 1934, as amended ("Act"). See 47 U.S.C. Sections 301, 302a, 333. The Act prohibits any person from willfully or maliciously interfering with the radio communications of any station licensed or authorized under the Act or operated by the U.S. government. 47 U.S.C. Section 333. The manufacture, importation, sale or offer for sale, including advertising, of devices designed to block or jam wireless transmissions is prohibited. 47 U.S.C. Section 302a(b). Parties in violation of these provisions may be subject to the penalties set out in 47 U.S.C. Sections 501-510. Fines for a first offense can range as high as $11,000 for each violation or imprisonment for up to one year, and the device used may also be seized and forfeited to the U.S. government.

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ck42
 
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Schematic questions

Post by ck42 »

1) For the AD8402, I see where the "Sweep BW adj" is done but what are the pin connections at those pot's positions in relation to the 8402? I don't see where the Terminal and Wiper connections are made at the AD8402.

2) In the schematic, there is an isolated fragment for the “Noise Source” section. It all makes sense except that resistor R90 has an open end…it doesn’t show where the other side of the resistor is connected. Where does this connect to?

3) Regarding the “Indicator” LED, what are the states that the LED can be in? On or Off only? Also, the part description for this LED is LED2. Maybe my eyes are tired, but I can’t seem to locate LED1 anywhere on the schematic. Is there another LED somewhere?

ck42
 
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Joined: Thu Jan 11, 2007 3:51 pm

Post by ck42 »

Never mind. Got the gerber files and traced back the pins using the board layout.

Although, I see from the board layout that R90 is also left hanging on one end. Is this a requirement of the noise source implementation or something?

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