The PA-PSHTR02 Heater Power Source is a microprocessor based Traveling Wave Tube (TWT) Heater filament power supply with a large and highly-visible LCD display.

Output Range

• Voltage – 50mV to 20V
• Current – 50mA to 10A
• 0.1% accuracy, 0.02% linearity

Control Interface

• Mode and output level controlled via front panel or RS-422 serial communications port.
• Multiple supplies can be connected to the same RS-422 line.
• Supports on-site software upgrades.

Converter Operation

• Converter provides both current and voltage regulation
• Precision AC power over a wide range of output impedances
• Current limited short-circuit protection
• Programmable setpoint can be limited by internal hardware adjustments
• 60Hz output synchronized to AC line input
• Short circuit protection by high-speed hardware loops
• Crowbar-protected in the event of a prolonged fault condition

Isolation

• Floating output can be connected to 10kV external DC voltages
• Galvanic and optical isolation withstand high voltage transients associated with Traveling Wave Tube applications.

Measurement

• Output is metered by precision True RMS to DC converters with gain accuracy of 0.1% and linearity within 0.02%
• Four-wire Kelvin connection for load point regulation
• Two-wire mode option provided
• Full software-controlled calibration support

Timer

• Filament on-time displayed on front panel
• Resettable filament timer