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RS232 and null modem: how to choose a DB9 cable without mistakes
Learn to tell straight-through DB9 from null modem, male from female, pinout and USB-to-serial adapters before connecting RS232 equipment.
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TV aerial cable: IEC, F connector and 75 ohms
Tell IEC and F connectors apart, plus 75-ohm coaxial cable, shielding and length, to connect DTT, TV, satellite or a set-top box.
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My printer won't detect USB: cable, port and diagnosis
Diagnose why your computer doesn't detect the printer: USB-B cable, port, driver, print queue and tests in order.
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VESA screws for TVs: size, length and safe mounting
Learn how to choose an M4, M5, M6 or M8 thread, work out the length and use washers and spacers to mount your TV safely.
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Single-mode or multi-mode fibre: SC, LC, APC, and UPC connectors
Learn to distinguish between single-mode and multi-mode fibre, SC and LC connectors, APC and UPC polishes, and simplex and duplex before ...
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How to choose a UPS for your router, NVR, and office rack
Calculate watts, battery life, and sockets to choose a UPS that protects your router, switch, NVR, and office equipment without falling s...
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