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Complete enhanced Intel 486SX-33 based computer in ultra small (9-7 81, x 6-5 8VV x 3-1 8H) case. Ideal for embedded operations or as a second computer, Features include One 16 bit ISA slot * 3 serial ports plus dedicated printer port Parallel optical coupled adapter port Built in IBM PC AT keyboard port On board VG A video and port Ises standard SIMM up to 32 MB BIOS is PC AT compatible ('nil li i> i hack up battery system in case of in wee failure luckuhk* hunt euver to prevail floppy drive...

QEX

The passband is that region containing signals we want to pass (logically) and the stopband is that region where we want to attenuate or reject signals. The stopband portion of the design involves measuring (or at least approximating) the magnitudes of the various harmonics leaving the output of the final-amplifier output network. Then we must determine the allowable magnitudes of each of the har-monics exiting the filter. With knowledge of these two items,...

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HoNe Laser Head him,, max. outpunThMoo. is < i,,,, mk. ni-c 8*).01 I.ascr Power Supply ('far HoNc tube) 79. I.ASKU SCANNliR AnSKMBI.Y 19. Assembly intended for a laser printer. Includes laser diode, polygon motor (6 sided) and misc. optics and lenses. LASER DIODE (5mW) with collimator 2Q. VISIBLE LASER DIODE 5mw at 670nm 15. Index guided. Threshold current 40 ma typical. 3 and 4mW, l,30Qnm LASER DIODES, 5.6mm package, 1 5 Mitsubishi Electric part number ML701BIR-E21 A, General specs are I....

Design your own Hf Vhf and UHF

In Introduction to Radio Frequency Design, Wes Hay ward, W7ZOI, gives you the fundamental how-to methods of radio frequency design to develop intuition for RF circuits and systems. He emphasizes practical application of simple circuit modes whenever possible and will prepare you to actually design HF, VHF and UHF equipment. Whether you're a newcomer or a veteran electronics experimenter, here's a way to learn RF design without intimidation emphasizes using models and their application to linear...

Info

3 ARRL Radio Designer and the Circles Utility, Part 1 Smith Chart Basics 10 Quick, Easy Network Analysis on a PC Using Mathcad 19 Signals, Samples, and Stuff A DSP Tutorial (Part 4) 30 A Faster and Better ADC for the DDC-Based Receiver ARRL Radio Designer, Example a 23-cm Preamp 39 A Remote Bandswitch for the Bug Catcher 44 The CYLOAD Cylinder-Loaded Dipole 47 A Concise Calculation Method for Pi-L Networks 49 Upcoming Conferences 57 RF 49 Conference Proceedings By Zack Lau, wivt 49 New Products...

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240x64 dor LCD with built-in controller. AND 4021ST-EO. Unit k EL back-lit. 59.or 2 for 109.' or OPTREX. DMF5005 non back-lit 49.or 2 for 89.' The huill-in ctmlmllt'r allows you lo tlo lex xuni coo . 5V power required Built-in C-MOS LCD driver amp controller Easy microprocessor interface 98 ASCII character generator Certain models are backlit, call for more info. 16x2 Ig. char. 10.00 16x4 15.00 Graphics and alphanumeric serial interface 640x480 backlit 640x400 backli 640x200 480x128 backlit...

Ad6640st Pcb Evaluation

Free dynamic range at 65 MSPS 90 dB SFDR with dither . The AD6640 is so new that, in August 1997,1 could purchase one only on an evaluation board. Thus, this design is based on the Analog Devices AD6640ST PCB evaluation board for the AD6640. The production part number for the ADC alone, is AD6640AST. The evaluation board my board is serial number 8 has an AD6640XST. The X indicates a preproduction part. Fig 1 shows the new front end. The remainder of the receiver hardware is diagrammed in my...

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Fig 10 CVSD voice-quality score versus-BER. As for the remote-control protocol, it's relatively easy to dream up byte sequences complex enough to achieve the required noise immunity, Command strings are sent from the serial port of the PC at the control point, multiplexed with any digitized audio, and transmitted to the remote site using the modem. After execution of the command, an acknowledgment is returned by the transceiver. This handshake is necessary to establish positive control....

END

Put the ONE element in the circuit block. Change TUNER to a 1POR 1 0 one port as shown. Set Report Editor to MS J with TERM 50 i0 Put load impedance data in the DATA block, real then imaginary. DATA is int erpo 1 a t ed between freq entries. In the OPT1 block, insert any freq value in the range, one at a time. Analyze, then Optimize at the freq that is in the OPT block. Check to see the min and ffiax values of tuning Ls and Cs that are needed. Check to see that MS11 reaches a very large value....

The American Radio Relay League

The American Radio Relay League, Inc, is a noncommercial association of radio amateurs, organized for the promotion of interests in Amateur Radio communication and experimentation, for the establishment of networks to provide communications in the event of disasters or other emergencies, for the advancement of radio art and of the public welfare, for the representation of the radio amateur in legislative matters, and for the maintenance of fraternalism and a high standard of conduct. ARRL is an...

Ou

Length of proposed antenna, L inches Diameter of wire section conductor, Dw inches Then calculate the following The minimum space required, Lmin inches The factor for conversions to electrical degrees, L g inches Length of wire section, Lw inches Length of cylindrical load, L y inches Length-to-diameter ratio of wire section, LJDy Characteristic impedance of wire section, Zqw ohms Characteristic impedance of cylindrical load, Z0Cyi ohms Diameter of the cylindrical load, , inches Regarding wire...

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These two expressions can be set equal to each other and solved for the ratio of ambient noise to the thermal and receiver noise. Fig 7 A wideband 20 dB attenuator 1 b-W resistors should be fine for the power levels common in receiver tests. Fig 8 Schematic of a resistive, 6-dB power divider. This gives the noise ratio as 5.8 dB. The ambient noise is still approximately 6 dB greater than the sum of thermal and receiver noise. Note that 51 and S2 in Eq 6 are gain ratios, not decibels. That is SI...