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“For Good Measure”^®

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Product List

T.M.I.

Test and Measurement Instruments C.C.

CK 1985/007464/23

“Tomorrow’s Instruments Today” — “For Good Measure” ^®

TMI, Established—1982

English, Afrikaans, Portuguese Speaking. Master/Visa Credit Cards

Satellite Antenna Portable Field Strength Meters

Field Strength Meters

Part : TV Explorer HD

Portable Field Strength Meter for HD. 6.5 inch LCD, HDMI and TS-ASI Connectivity. For use in Terrestrial, Satellite HD, Cable, Mobile and Analogue TV.

Promax

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Portable Field Strength Meters for use with Top TV, DSTV, Terrestrial, Satellite, Satellite HD, Cable, Mobile and Analogue TV, with Spectrum Analyser, having Auto reference level with reports and Auto Internet updates. Echoes detection, and Satellite IF test and much more …….

Please Note: This is not our complete range, so please contact us for further information on any product that you require, which is not seen on our site. You can call us on +27 (011) 683 4365 or email us by clicking here.

Part No: Sathunter

Satellite Hunter for installation of Satellite reception systems. Displays Satellite ID , Orbital Position and Service List.

Promax

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See also: Promax Electronics

Part No: Prodig-3

Entry level TV & SAT Level Meter& Analyser. Software self upgrade with PC. Datalogger, Auto search & signal identification, Spectrum Analyser.

Promax

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Part No: WS-6932

HD Satellite Finder Spectrum Analyser. DBV-S/DVB-2 fast Software upgrade with USB2.0 port. Li-Ion Batt. Key smartLight, Built In Flash Light. Symbol rate to 45MSps.

WS-6902 Satelite Finder Spectrum Analyser

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This project is very useful for the radio frequency (rf) engineer and hobbyist, especially when the final rf transmission has to adjusted . Setting up an antenna impedance matcher is one example. Here is the schematic diagram of this rf meter circuit:

D-I-Y Project

The circuit uses a single transistor (MPSA18) as the active component. The signal strength meter display uses an analog meter (1 mA full scale) . This rf field strength meter has no scale. The important thing for this uncalibrated rf meter is that it can display the changes of an rf field when we calibrate the antenna or the matching network for the rf transmitter-antenna loading. If we are tuning the antenna size or the transmitter-antenna matcher filter, then just observe the analog meter to get maximum deflection.

Look at the transistor circuit, the base of the transistor is not biased by the voltage from the power supply. It is directly driven by the signal from the rectified received rf signal. It means that the circuit won’t draw any current from battery if there’s no received rf signal, so it doesn’t need a power switch to cut the power consumption of the supply (the battery), just make sure to move it away from strong active rf transmitter when this device is not in use. [Circuit schematic diagram source: techlib.com]

Part No: TM200-SH

Small Satellite Finder . 75 ohm. 950Mhz - 2150 Mhz. Input Level –65 to –25dBm. Preset Global Data. Programmable. LNB Short cct Protection. No Stock.