diff --git a/fast-servo/pyfastservo/dac.py b/fast-servo/pyfastservo/dac.py
index 9a376c7..49319d8 100644
--- a/fast-servo/pyfastservo/dac.py
+++ b/fast-servo/pyfastservo/dac.py
@@ -58,7 +58,7 @@ def check_version(spi):
 def configure_dac(spi):
     power_down_reg = spi_read(spi, 0x01)
     spi_write(spi, 0x01, power_down_reg & ~(1 << 0))  # Clear EXTREF bit for internal reference
-    spi_write(spi, 0x0D, 0x00)      # Set RREF to 10 kΩ for 1.0V reference
+    # spi_write(spi, 0x0D, 0x00)      # Set RREF to 10 kΩ for 1.0V reference
     spi_write(spi, 0x04, 0xA0)      # Enable on-chip IRSET (1.6 kΩ for 20mA output)
     spi_write(spi, 0x07, 0xA0)      # Enable on-chip QRSET (1.6 kΩ for 20mA output)
     spi_write(spi, 0x05, 0x00)      # Disable internal IRCML
@@ -125,7 +125,7 @@ def configure_ad9117():
             return False
 
         configure_dac(spi)
-        dac_self_calibration(spi)
+        # dac_self_calibration(spi)
 
         # Enable DAC outputs
         spi_write(spi, 0x01, spi_read(spi, 0x01) & ~((1 << 4) | (1 << 3)))