Sandford Associates - Total Service Specialists for the HP4815A RF Vector Impedance Meter

The TOTAL Service Specialists
for the Hewlett-Packard 4815A RF Vector Impedance Meter.

  
Sandford Associates Home Page
HP 4815A Vector Impedance Meter Technical Capabilities HP 4815A Vector Impedance Meter Service Expertise HP 4815A Vector Impedance Meter Repair Request Form Contact Sandford Associates
 
 

Critical waveshapes for the HP4815A RF Vector Impedance Meter
Viewing one of many
critical waveshapes.

Schematics and expertise utilized for the HP4815A RF Vector Impedance Meter
Lots of schematics and
factory expertise employed.

Internal workings of the HP4815A RF Vector Impedance Meter
Some internal workings exposed
during calibration.
 
 
 

Simplified Block Diagram – Vector Impedance Meters

Simplified Block Diagram - Vectore Impedance Meters
 
 
 

Impedance measurements made on the HP4815A follow directly from Ohm’s law.

This website is for all HP4815A users concerned with maintaining the unique precise analog measuring capabilities of the HP4815A. This unique and important instrument will continue to be supported by us. The Probe, a very intricate assembly requiring special factory tools for disassembly can only be calibrated to specification using HP standards and factory expertise. The main frame of the HP4815A is very rugged and well designed and will last many years without degrading in performance. The Probe is the key to the unique HP4815A with its ability to ease tedious parameter measurements, by employing analog “Probe & Read” measuring techniques that digital instruments do not provide.