Specifications

ZVx Selftest
1043.0009.50 4.7 E-3
4.4 Self test
The current firmware version does not support an automatic self test yet.
However, the necessary hardware facilities are provided and can be used for troubleshooting with the
aid of service functions (see Service Manual).
Each synthesizer and signal module contains one or two 1-out-of-8 analog multiplexer which selects up
to 16 test voltages via buffer amplifier and applies them to the common test channel. In order to locate
an error, various functions can be monitored:
• Internally generated supply voltages,
• operating points of amplifiers,
• tuning voltages of oscillators,
• signal level,
• signal level with the aid of level detectors.
The test channel is selected via the serial module control. An extra A/D converter on the MCU module
enables display of the test signals even during normal measurement mode.