diff --git a/artiq/firmware/satman/main.rs b/artiq/firmware/satman/main.rs
index 7afa21337..faac96946 100644
--- a/artiq/firmware/satman/main.rs
+++ b/artiq/firmware/satman/main.rs
@@ -270,13 +270,13 @@ pub extern fn main() -> i32 {
 
     i2c::init();
     si5324::setup(&SI5324_SETTINGS, si5324::Input::Ckin1).expect("cannot initialize Si5324");
+    #[cfg(has_hmc830_7043)]
+    /* must be the first SPI init because of HMC830 SPI mode selection */
+    hmc830_7043::init().expect("cannot initialize HMC830/7043");
     unsafe {
         csr::drtio_transceiver::stable_clkin_write(1);
     }
 
-    #[cfg(has_hmc830_7043)]
-    /* must be the first SPI init because of HMC830 SPI mode selection */
-    hmc830_7043::init().expect("cannot initialize HMC830/7043");
     #[cfg(has_ad9154)]
     let mut ad9154_initialized = false;
     #[cfg(has_allaki_atts)]
diff --git a/artiq/gateware/targets/sayma_amc.py b/artiq/gateware/targets/sayma_amc.py
index 7090805ba..e9fcf3fd5 100755
--- a/artiq/gateware/targets/sayma_amc.py
+++ b/artiq/gateware/targets/sayma_amc.py
@@ -552,7 +552,7 @@ class Satellite(BaseSoC, RTMCommon):
 
         self.comb += platform.request("sfp_tx_disable", 0).eq(0)
         self.submodules.drtio_transceiver = gth_ultrascale.GTH(
-            clock_pads=platform.request("si5324_clkout"),
+            clock_pads=platform.request("dac_refclk", 0),
             data_pads=[platform.request("sfp", 0)],
             sys_clk_freq=self.clk_freq,
             rtio_clk_freq=rtio_clk_freq)