examples: add SAWG sines (DAC synchronization test)

artiq/examples/sayma_standalone/repository/sines.py

@@ -0,0 +1,22 @@
+from artiq.experiment import *
+
+
+class SAWGTest(EnvExperiment):
+    def build(self):
+        self.setattr_device("core")
+        self.setattr_device("ttl_sma_out")
+        self.sawgs = [self.get_device("sawg"+str(i)) for i in range(8)]
+
+    @kernel
+    def run(self):
+        self.core.reset()
+
+        for sawg in self.sawgs:
+            delay(1*ms)
+            sawg.amplitude1.set(.4)
+            # Do not use a sub-multiple of oscilloscope sample rates.
+            sawg.frequency0.set(49*MHz)
+
+        while True:
+            delay(0.5*ms)
+            self.ttl_sma_out.pulse(0.5*ms)