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This commit is contained in:
Frank Mori Hess 2003-06-17 00:44:14 +00:00
parent b0a4a1dbd0
commit 57f038f35c
1 changed files with 5 additions and 3 deletions
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8
comedi_calibrate/cb.c
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@ -489,9 +489,11 @@ static int cal_cb_pci_1602_16( calibration_setup_t *setup )
layout.adc_ground_observable = ai_ground_observable_1xxx;
layout.dac_high_observable = ao_high_observable_1xxx;
layout.dac_ground_observable = ao_ground_observable_1xxx;
/* On unipolar ranges, both the gain and offset adjustments couple
* to the ground observables. I don't know if there is a way
* to get around it, so we'll just use the bipolar postgain setting. */
/* The bipolar postgain calibration should be good for both
* bipolar and unipolar ranges, so disable separate
* unipolar postgain offset calibration (it will fail
* horribly anyways if you try it).
*/
layout.do_adc_unipolar_postgain = 0;
return generic_cal_by_range( setup, &layout );
}