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Klystron Power Supply

Manufacturer: Philips
Model: PM 7812

Description

Drives low power, low voltage klystrons. Two meters monitor the reflector voltage and the resonator current of the klystron.

Specifications


Resonator voltage	300 V DC, fixed
Resonator current	max 40mA
Resonator stability	< 0.05% at 10% mains fluctuations
Resonator ripple	< 1 mV rms
Reflector voltage	0-250 V DC (negative), continuously adjustable
Reflector current	0.5 mA (short-circuit)
Reflector stability	< 0.05% at 10% mains fluctations
Reflector ripple	< 3 mV rms
Sine wave voltage	50 Hz, 0-85 V p-p cont. adjustable
Sine wave current	0.6 mA (short-circuit)

External Modulation	Input imedance 500 k Ohms/27nF, BNC-jack
Internal Modulation	Square wave 40V, 1000Hz, variable ±100Hz
	Sine wave 85V p-p, 50 Hz

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Operating Instructions

Make sure the red button "Res/Refl." is out.
Switch on power supply. The signal lamp on the panel should light up.
After approx. 30 seconds, the variable reflector voltage can be adjusted with the knob on the panel. The value can be read on the meter to the left. According to the application this voltage can be modulated with square wave, sine wave or externally.
- Square wave - A 1000 Hz 40V square wave is fed to the reflector voltage internally. The frequency can be adjusted from 900 to 1100 Hz, at the rear.
- Sine wave - A fixed 30V sine wave is fed to the reflector voltage internally. The sine voltage is also available at the front panel through a BNC-jack. This voltage is adjustable in amplitude and phase at the rear
- External - A modulation voltage can be fed to the BNC-jack on the panel. A diode in the power supply prevents the reflector voltage from becoming positive.
Press the red button "Res/Refl on". The resonator voltage and the reflector voltage is now available at the 6 pole connector. The load current of the 300 V output can be read on the meter to the right.

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keywords: microwave source, electrical source, current source, voltage source.

Document created July 22, 1996. Original author: Jaime Espinoza.
Last updated 07/26/96. Revised by David Harrison.