updated comment

diff --git a/comedi_calibrate/cb.c b/comedi_calibrate/cb.c
index b005ef01cc108e25bd74c35e7ce4a2d53adcb800..5e410be12ef051877355971bc722af66eb64ae57 100644 (file)
--- a/comedi_calibrate/cb.c
+++ b/comedi_calibrate/cb.c
@@ -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 );
 }