GSi TYMPSTAR 1, Service Manual

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Chapter 4
Switch 7: Self-Cal If this switch is in the ON position when the Cal mode is entered, the TympStar will
perform a Self-Calibration. The Self-Cal automatically adjusts the probe tone fre-
quencies to within plus or minus one percent of nominal and balances some micro-
phone filters for proper linearity. Once Self-Cal is complete, all the pertinent cali-
bration data is stored in the TympStar.
Switch 8: Load Default calibration data is stored by the TympStar and is used as a basis for calibra-
default calibration tions. This data consists of operational parameters for stimulus SPL, compliance
data circuits, probe tone frequencies and microphone filters. When the Cal mode is
entered with the switch in the ON position, softkeys will be displayed on the LCD
providing a choice of default data that can be loaded.
CAUTION
Default data is not accurate for test measurements. It is only useful as a
starting point for complete calibration. A Self-Cal followed by a complete
system calibration must be performed after loading default data.
Probe serial number
The TympStar calibration can be performed only when the TympStar system is
operating with the correct probe. The serial number of the correct probe is shown
on the TympStar’s initialization screen when power is applied to the system.
Probe serial number
CAUTION
If the serial number shown on the initialization screen does not match the
TympStar’s probe serial number label, abort the calibration and contact GSI
technical support.
Grason-Stadler
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