While the 'distance-to-fault' (DTF) transmission line test is irreplaceable as a site diagnostic tool, the growing trend to specify threshold DTF performance levels is worrying RF practitioners the world over
By combining electronic and mechanical testing through mounting the board under test in a cantilevered or two-support beam position and subjecting it to an oscillating force, important reliability information can be gained and incipient failure modes; eg, track breakage, SMD and pin joint failures revealed.
With its E high-power series, Epcos has introduced a family of transformers that can handle extremely high power densities while taking up less space. The EHP 16, for example, can transfer 25 W, twice that of the commonly used EF16 transformer with the same footprint. The latest transformer series comprises four versions: EHP 16 and EHP 19 as SMDs designed for 25 and 35 W, while the EHP5.0 and EHP 26 are leaded components designed to handle 50 and 100 W. The components' space requirements range from 17 x 23.3 mm to 27 x 27.5 mm. The pre-tinned core can be soldered directly to the circuit board, which ensures good heat transfer and improved cooling.
Symbol Technologies has introduced the AP-5131 access point - a device designed to address the wireless and wired connectivity needs of the branch office, small retail outlet and hospitality sector. It is a single-box solution that integrates all services required to extend secure broadband access to mobile users.
The HPI series of high-power inductors from Epcos covers the inductance range from 0.5 to 3.92 µH and can handle currents up to 30 A. Depending on inductance, insertion height is 4.95 or 5.95 mm for a footprint of 11 x 13.1 mm. Resistance ranges from 1.1 to 6.0 milliohm.