Input/Output Impedance Measurement Set
The Input/Output Impedance Measurement Set enables the engineer to perform input impedance, output impedance and conducted audio susceptibility measurements on systems while the systems are under operational power. The Measurement Set is used in conjunction with the Venable Frequency Response Analyzer System hardware and software. The Measurement Set consists of a power amplifier, step down isolation transformer and interconnecting cables.
The Measurement Set extends the Frequency Response Analyzer oscillator drive to include high current/low impedance applications. All Venable System features are fully operational including servo. The power amplifier has one manual gain adjustment but does not require calibration. The automatic Venable System performs all precision control and measurement. The amplifier utilizes rugged selfprotection circuits for routine overloads. The isolation transformer enables direct injection of test signals into the customer’s systems while under full power and loading. The transformer is designed to carry substantial DC without core saturation for undistorted drive. Measurement Sets are optionally available in 50 amp (IOZ- 50) and 100 amp (IOZ-100) ratings depending upon the current requirements of the system under test. The customer provides either a current probe or low ohms
series resistor for current sense. Measured impedances at any frequency are conveniently available on the screen or printer.
Input/Output Impedance Measurement Sets
• Output Power — 100 Watts into 2.4 ohms
• Output Voltage (Power Amplifier) — 16 Vrms into
• Output Voltage (Secondary of Transformer) 7.7
Vrms into 0.6 ohms
• Direct Current through transformer without core
IOZ-50 — 50 amps
IOZ-100 — 100 amps
• Power Requirements 115 VAC 60 Hz 4 amps