diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e8e0e4e..9d0c2fe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,6 +85,12 @@ jobs:
             target/*/release/stabilizer
             stabilizer-release.bin
 
+      - name: Build (Pounder v1.1)
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --features ${{ matrix.features }}
+
   test:
     runs-on: ubuntu-latest
     strategy:
diff --git a/src/design_parameters.rs b/src/design_parameters.rs
index f6222d2..3788764 100644
--- a/src/design_parameters.rs
+++ b/src/design_parameters.rs
@@ -21,19 +21,19 @@ pub const POUNDER_IO_UPDATE_DELAY: f32 = 900_e-9;
 
 /// The duration to assert IO_Update for the pounder DDS.
 // IO_Update should be latched for 4 SYNC_CLK cycles after the QSPI profile write. With pounder
-// SYNC_CLK running at 100MHz (1/4 of the pounder reference clock of 400MHz), this corresponds to
-// 40ns. To accomodate rounding errors, we use 50ns instead.
+// SYNC_CLK running at 100MHz (1/4 of the pounder reference clock of 500MHz), this corresponds to
+// 32ns. To accomodate rounding errors, we use 50ns instead.
 pub const POUNDER_IO_UPDATE_DURATION: f32 = 50_e-9;
 
 /// The DDS reference clock frequency in MHz.
-pub const DDS_REF_CLK_MHZ: u32 = 100;
+pub const DDS_REF_CLK: MegaHertz = MegaHertz(100);
 
 /// The multiplier used for the DDS reference clock PLL.
 pub const DDS_MULTIPLIER: u8 = 5;
 
 /// The DDS system clock frequency after the internal PLL multiplication.
-pub const DDS_SYSTEM_CLK_MHZ: u32 = DDS_REF_CLK_MHZ * DDS_MULTIPLIER as u32;
+pub const DDS_SYSTEM_CLK: MegaHertz =
+    MegaHertz(DDS_REF_CLK.0 * DDS_MULTIPLIER as u32);
 
-/// The rate of the DDS SYNC_CLK in MHz is always 1/4 that of the internal PLL clock.
-#[allow(dead_code)]
-pub const DDS_SYNC_CLK_MHZ: u32 = DDS_SYSTEM_CLK_MHZ / 4;
+/// The divider from the DDS system clock to the SYNC_CLK output (sync-clk is always 1/4 of sysclk).
+pub const DDS_SYNC_CLK_DIV: u8 = 4;
diff --git a/src/main.rs b/src/main.rs
index c01c27d..2684eed 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -30,6 +30,8 @@ extern crate panic_halt;
 #[macro_use]
 extern crate log;
 
+use core::convert::TryInto;
+
 // use core::sync::atomic::{AtomicU32, AtomicBool, Ordering};
 use cortex_m_rt::exception;
 use rtic::cyccnt::{Instant, U32Ext};
@@ -562,13 +564,16 @@ const APP: () = {
 
                 let mut io_update = gpiog.pg7.into_push_pull_output();
 
+                let ref_clk: hal::time::Hertz =
+                    design_parameters::DDS_REF_CLK.into();
+
                 let ad9959 = ad9959::Ad9959::new(
                     qspi_interface,
                     reset_pin,
                     &mut io_update,
                     &mut delay,
                     ad9959::Mode::FourBitSerial,
-                    design_parameters::DDS_REF_CLK_MHZ as f32 * 1_000_000_f32,
+                    ref_clk.0 as f32,
                     design_parameters::DDS_MULTIPLIER,
                 )
                 .unwrap();
@@ -850,13 +855,18 @@ const APP: () = {
             timestamp_timer.start();
 
             // We want the pounder timestamp timer to overflow once per batch.
-            let tick_ratio = design_parameters::DDS_SYNC_CLK_MHZ as f32
-                / design_parameters::TIMER_FREQUENCY_MHZ as f32;
+            let tick_ratio = {
+                let sync_clk_mhz: f32 = design_parameters::DDS_SYSTEM_CLK.0
+                    as f32
+                    / design_parameters::DDS_SYNC_CLK_DIV as f32;
+                sync_clk_mhz / design_parameters::TIMER_FREQUENCY.0 as f32
+            };
+
             let period = (tick_ratio
                 * ADC_SAMPLE_TICKS as f32
                 * SAMPLE_BUFFER_SIZE as f32) as u32
                 / 4;
-            timestamp_timer.set_period((period - 1).try_into().unwrap());
+            timestamp_timer.set_period_ticks((period - 1).try_into().unwrap());
             let tim8_channels = timestamp_timer.channels();
 
             let stamper = pounder::timestamp::Timestamper::new(