6.9.3 Front/ACQ System Adjustments
6.9.3.1 Internal reference voltage adjustment
6.9.3.1.1 Adjustment of reference voltage for automatic calibration
Adjusts the internal reference voltage used for automatic calibration to be within the range from
-600mV to +600mV.
Adjustment standard ±0.02%
Adjustment method
(1) Open the “Maintenance2” menu and set “DAC and Calout - CalOut”
to “+600mV.”
(2) Measure the CAL OUT pin with a multimeter and adjust the
reference voltage such that the pin’s voltage becomes +600 mV.
(3) Set “CalOut” to “–600 mV.”
(4) Measure the CAL OUT pin with a multimeter and adjust the
reference voltage such that the pin’s voltage becomes –600 mV.
(5) Click “Save To HW” to save to the EEPROM.
Note: If the “+600mV” and “-600mV” adjusting sequence is reversed,
repeated adjustments will be necessary.
6.9.3.1.2 Adjustment of reference voltage for CAL signal
Adjusts the CAL signal output voltage to be within the range from +1.0V to -1.0V.
Adjustment standard ±0.1%
Adjustment method
(1) Open the “Maintenance2” menu and set “CalOut” to “+1V.”
(2) Measure the CAL OUT pin with a multimeter and adjust the
reference voltage such that the pin’s voltage becomes +1V ± 0.1%.
(3) Set “CalOut” to “-1V.”
(4) Measure the CAL OUT pin with a multimeter and adjust the
reference voltage such that the pin’s voltage becomes -1 V ± 0.1%.
(5) Click “Save To HW” to save to the EEPROM.
6.9.3.1.3 Measurement of overload detection reference level
Measures automatically the reference level for 50Ω overload detection (when there is no signal).
Adjustment method
(1) With no connections made to the channels, perform a “heat run” for
at least 5 minutes.
(2) Open the “Maintenance1” menu and click “Automatic Adjustment –
Overload” to measure the reference voltage.
(3) Click “Save To HW” to save to the EEPROM.
Note: The heat run shall not be omitted since reference values cannot be measured accurately
immediately after use with 50Ω coupling.
Maintenance 6-37
To Next Page
Loading...
Need help?
General
