Re: Asteroids/Asteroids Deluxe - Current Tracer for shorts

Marc,
    Regarding the HP signal tracer, I have one of those too and wanted to
use it for exactly the same fault condition (short on power supply).
However, this device can only trace pulsed currents as your description
clearly states below. Therefore, it's no good for this type of problem on
its own. You could probably use it in conjunction with the matching logic
signal injector model 546A. Having said this, I still advocate the big 5V
psu and use your finder to find the hot spot method which will have it fixed
before you've got the HP kit set up and read the manuals ;-).

Regards

Mike Mnemonic

----- Original Message -----
From: Marc Alexander <marc@wolfems.com.au>
To: <vectorlist@synthcom.com>
Sent: Friday, August 24, 2001 3:37 PM
Subject: Re: VECTOR: Asteroids/Asteroids Deluxe - Current Tracer for shorts

HP 547A Current Tracer

“The HP 547A Current Tracer is a hand-held probe which enables the precise
localization of low-impedance faults in electrical
systems. The probe senses the magnetic field generated by a pulsing current
internal to the circuit or by current pulses supplied by
an external stimulus such as the HP 546A Logic Pulsers. Indication of the
presence of current pulses is provided by lighting the
indicator lamp near the Current Tracer tip. Adjustment of probe sensitivity
over the 1 mA to 1A range is provided by the SENSITIVITY
control near the indicator. The probe is self-contained and requires <75 mA
at 4.5V to 18V, from any convenient source.”
I don’t use this very often, but when I need it, I really need it. It’s used
for finding things like shorted input gates, stuck
tri-state buses and broken/shorted traces.

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Received on Sat Aug 25 03:24:10 2001