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Noise Diodes (J.Quick)

The HP1000 controls the calibration Noise Diodes through a 3:8 multiplexed relay based driver circuit. In the NCCS independent control of up to 16 noise diodes is required. Furthermore all noise diodes must be capable of being continuously toggled by some external reference signal.

The following solution was proposed :

Tasks completed:

$\Longrightarrow$
DESIGN NEW NOISE DIODE CONTROL CIRCUIT,
$\Longrightarrow$
ADD SUPPORT FOR NOISE DIODES INTO SDIO DEVICE SERVER,

Tasks still to be done :

$\Longrightarrow$
BUILD THREE INTEGRATED EIGHT-WAY NOISE DIODE CONTROLLERS.
$\Longrightarrow$
DESIGN AND BUILD CALIBRATION NOISE DIODE DRIVER INTERFACE.

Note: The same circuitry can be used to control Dicke Switches as well merely by adapting the final driver interface suitably.


next up previous contents
Next: Time (J.Quick) Up: Phase 1 - Limited Previous: Instrumentation Control Bus (J.Quick)
Mike Gaylard
1999-06-11