The 6565 HF DC Bias Unit is intended to be used with a Wayne Kerr 6500 analyzer, either the 6500B Precision Impedance Analyzer or the 6500P HF LCR Meter. Its function is to provide a source of DC bias current through the Device Under Test (DUT) while the analyzer is making AC measurements. Each 6565 unit can provide up to 10 A of DC current, and up to six 6565 units can be connected in parallel to supply a maximum 60 A. A digital ammeter on the front panel allows the user to see the dc bias current value and an indicator LED shows when the bias current is enabled.
High current 50Ω coaxial cable is used to carry the DC bias current from the 6565 unit to the fixture. The measurement signal from the 6500 analyzer front panel is connected to the fixture using a dedicated cable, a control cable connects the rear panels of the 6500 and 6565, and a safety interlock cable is connected from the fixture to the rear panel of the 6565.
There are 3 models in the 6565 series. The models are defined by their frequency range as follows:
6565-05 20 Hz to 5 MHz
6565-30 20 Hz to 30 MHz
6565-120 20 Hz to 120 MHz
Any 6500 analyzer can be used with any 6565 unit. The maximum measurement frequency of the system will be determined by the instrument with the lower maximum frequency. For example, a 120 MHz 65120P used with a 5 MHz 6565-05 will have a maximum measurement frequency of 5 MHz
The 6500 analyzer controls the 6565 unit. The DC bias current is set as part of the 6500's measurement setup and the 6565's status and warning messages are shown on the 6500's display.
A common wound component measurement with the 6500B/6565 system is to measure the value of inductance as the DC Bias Current through the DUT is swept from 0A to the DUT's rated maximum current.
Another common technique is to use the Reference Trace function on the 6500B Precision Component Analyzer. This allows frequencies sweeps performed at different DC bias current levels to be instantly displayed and compared on the 6500B's display, as shown in the example screenshot below.
Frequency sweeps for Impedance and Phase Angle for 0 A and 10 A DC Bias Current
DIP Fixture, The 1026 fixture is used with 6565 dc bias units to mount conventional DIL devices for testing up to 20A
DIP Fixture, The 1027 fixture is used with 6565 dc bias units to mount conventional DIL devices for testing up to 40A
DIP Fixture, The 1028 fixture is used with 6565 dc bias units to mount conventional DIL devices for testing up to 60A
SMD 2 Terminal Bottom Contact Adaptor, The 1031 adaptor is used with 1026, 1027 or 1028 fixtures to allow 2-terminal connections to bottom contact surface mount devices for testing up to 60A.
Bias Fixture Adaptor , The 1037 Adaptor provides SMA interface connectivity from a 6565 to a remote test head, such as a SMD taping machine
4 Terminal SMD Fixture, The 10264 fixture is used with 6565 dc bias units to allow 4-terminal connections to bottom contact surface mount devices for testing up to 20A
Fixture, The 10284 fixture is used with 6565 dc bias units to allow 4-terminal connections to bottom contact surface mount devices for testing up to 60A
Impedance Analyzer, Accurate high frequency measurements combined with an easy to use graphical interface and high resolution colour display. All analyzers have a 0.05% basic accuracy, a minimum frequency of 20Hz and a maximum frequency up to 120MHz depending on model.
High Frequency LCR Meter, The 6500P series of high frequency LCR meters include extended test frequency capability, high accuracy and a large high resolution color display