diff --git a/designs/full_new_reflectometer/tests/test_timing.xdc b/designs/full_new_reflectometer/tests/test_timing.xdc
new file mode 100644
index 0000000..12725ca
--- /dev/null
+++ b/designs/full_new_reflectometer/tests/test_timing.xdc
@@ -0,0 +1,7 @@
+# Primary clocks
+create_clock -name ref_clock    -period 5.000  [get_ports ctrl_clk]
+
+set clk_125_name [get_clocks -of_objects [get_pins generator_inst/clk_dac_125]]
+set clk_65_name  [get_clocks -of_objects [get_pins accumulator_top_inst/clk_adc_65]]
+
+set_clock_groups -asynchronous -group $clk_125_name -group $clk_65_name
\ No newline at end of file