Hp 5385a Frequency Counter Manual

On the bench today is a HP 5385A frequency counter which seems to have a short to ground on the 5+ rail. Fixed: The 5v over voltage crowbar protection circuit was being switched in, because the 5V rail became noisy/ripple (+/- 700mv ripple voltage).

Canon Device No Driver Found. Description The Agilent 5384A Frequency Counter utilizes interpolar-enhanced reciprocal counting to provide outstanding performance at a low cost. Frequency coverage allows measurements from 10 Hz to 225 MHz, with resolution of nine digits per second. The 5384A incorporates a programmable alphanumeric display, accessible remotely via HP-IB (IEEE-488). Elantech Touchpad Driver Windows 10 Acer there.

The liquid crystal display (LCD) reduces component count, is easy to read (indoors or out), and improves counter reliability and serviceability. • High input sensitivity extends applications • Extensive input conditioning improves accuracy • Variable display digits improve readability • External dc operation extends portability • Proven reliability • For complete details, click on the Data Sheet link. • High Input Sensitivity • At least 15 mV rms sensitivity reduces the need for preamps and improves low-level signal measurement accuracy. • Extensive Input Conditioning • A low pass filter, automatic or manual attenuator and trigger level control features provide versatile signal-to-noise conditioning for optimum accuracy. • Variable Display Digits • View only readable digits from stable signals by controlling the number of display digits.

Use as few as 3 or as many as 11 digits. • External dc Operation • Wide range (9-15V) external dc input power allows use of sources such as 12V automobile power to keep the timebase warm, or charge the battery option while in transit to remote sites.