diff --git a/artiq/frontend/pdq2_client.py b/artiq/frontend/pdq2_client.py
index d8c7955ed..437857d0e 100755
--- a/artiq/frontend/pdq2_client.py
+++ b/artiq/frontend/pdq2_client.py
@@ -28,25 +28,17 @@ def get_argparser():
     parser.add_argument("-u", "--voltages",
                         default="(1-np.cos(t/t[-1]*2*np.pi))/2",
                         help="sample voltages (V) [%(default)s]")
-    parser.add_argument("-a", "--aux", default=False, action="store_true",
-                        help="axiliary digital output [%(default)%s]")
     parser.add_argument("-o", "--order", default=3, type=int,
                         help="interpolation (0: const, 1: lin, 2: quad,"
                         " 3: cubic) [%(default)s]")
-    parser.add_argument("-p", "--plot", help="plot to file [%(default)s]")
     parser.add_argument("-r", "--reset", default=False,
                         action="store_true", help="do reset before")
-    parser.add_argument("-m", "--dcm", default=False, action="store_true",
-                        help="100MHz clock [%(default)s]")
+    parser.add_argument("-m", "--multiplier", default=False,
+                        action="store_true", help="100MHz clock [%(default)s]")
     parser.add_argument("-n", "--disarm", default=False, action="store_true",
                         help="disarm group [%(default)s]")
     parser.add_argument("-e", "--free", default=False, action="store_true",
                         help="software trigger [%(default)s]")
-    parser.add_argument("-x", "--demo", default=False, action="store_true",
-                        help="demo mode: pulse and chirp, 1V*ch+0.1V*frame"
-                        " [%(default)s]")
-    parser.add_argument("-b", "--bit", default=False,
-                        action="store_true", help="do bit test")
     verbosity_args(parser)
     return parser
 
@@ -60,57 +52,44 @@ def main():
         dev.write(b"\x00\x00")  # flush any escape
         dev.cmd("RESET", True)
         time.sleep(.1)
+
+    dev.cmd("DCM", args.multiplier)
+    freq = 50e6
+    if args.multiplier:
+        freq *= 2
+
+    times = np.around(eval(args.times, globals(), {})*freq)
+    voltages = eval(args.voltages, globals(), dict(t=times/freq))
+
     dev.cmd("START", False)
-    dev.cmd("ARM", False)
-    dev.cmd("DCM", args.dcm)
-    freq = 100e6 if args.dcm else 50e6
-    dev.set_freq(freq)
-    times = eval(args.times, globals(), {})
-    voltages = eval(args.voltages, globals(), dict(t=times))
+    dev.cmd("ARM", True)
+    dev.cmd("TRIGGER", True)
+    dev.flush()
 
-    if args.demo:
-        for ch, channel in enumerate(dev.channels):
-            entry = []
-            for fr in range(dev.channels[0].num_frames):
-                vi = .1*fr + ch + voltages
-                entry.append(channel.segment(times, vi, order=args.order,
-                                             end=False, aux=args.aux))
-                pi = 2*np.pi*(-.5 + .01*fr + .1*ch + 0*voltages)
-                fi = 10e6*times/times[-1]
-                channel.segment(2*times, voltages, pi, fi, trigger=False,
-                                silence=True, aux=args.aux)
-            dev.write_channel(channel, entry)
-    elif args.bit:
-        v = [-1, 0, -1]
-        # for i in range(15):
-        #     v.extend([(1 << i) - 1, 1 << i])
-        v = np.array(v)*dev.channels[0].max_out/dev.channels[0].max_val
-        t = np.arange(len(v))
-        for channel in dev.channels:
-            s = channel.segment(t, v, order=0, shift=15, stop=False,
-                                trigger=False)
-            dev.write_channel(channel, [s for i in range(channel.num_frames)])
+    dt = np.diff(times.astype(np.int))
+    if args.order:
+        tck = interpolate.splrep(times, voltages, k=args.order, s=0)
+        u = interpolate.spalde(times, tck)
     else:
-        c = dev.channels[args.channel]
-        map = [None] * c.num_frames
-        map[args.frame] = c.segment(times, voltages, order=args.order,
-                                    aux=args.aux)
-        dev.write_channel(c, map)
+        u = voltages[:, None]
+    segment = []
+    for dti, ui in zip(dt, u):
+        segment.append({
+            "duration": int(dti),
+            "channel_data": [{
+                "bias": {
+                    "amplitude": [float(uij) for uij in ui]
+                }
+            }]
+        })
+    program = [[] for i in range(args.frame)]
+    program.append(segment)
+    dev.program(program, [args.channel])
 
-    dev.cmd("START", True)
-    dev.cmd("ARM", not args.disarm)
     dev.cmd("TRIGGER", args.free)
-
-    if args.plot:
-        from matplotlib import pyplot as plt
-        fig, ax = plt.subplots()
-        ax.plot(times, voltages, "xk", label="points")
-        if args.order > 0:
-            spline = interpolate.splrep(times, voltages, k=args.order)
-            ttimes = np.arange(0, times[-1], 1/freq)
-            vvoltages = interpolate.splev(ttimes, spline)
-            ax.plot(ttimes, vvoltages, ",b", label="interpolation")
-        fig.savefig(args.plot)
+    dev.cmd("ARM", not args.disarm)
+    dev.cmd("START", True)
+    dev.flush()
 
 
 if __name__ == "__main__":
diff --git a/artiq/frontend/pdq2_controller.py b/artiq/frontend/pdq2_controller.py
index e8b9a77c1..ec810b5ed 100755
--- a/artiq/frontend/pdq2_controller.py
+++ b/artiq/frontend/pdq2_controller.py
@@ -12,8 +12,7 @@ def get_argparser():
     parser = argparse.ArgumentParser(description="PDQ2 controller")
     simple_network_args(parser, 3252)
     parser.add_argument(
-        "-d", "--device", default=None,
-        help="serial port.")
+        "-d", "--device", default=None, help="serial port.")
     parser.add_argument(
         "--simulation", action="store_true",
         help="Put the driver in simulation mode, even if --device is used.")
@@ -38,8 +37,8 @@ def main():
         port = open(args.dump, "wb")
     dev = Pdq2(url=args.device, dev=port)
     try:
-        simple_server_loop({"pdq2": dev}, bind_address_from_args(args), args.port,
-                           description="device=" + str(args.device))
+        simple_server_loop({"pdq2": dev}, bind_address_from_args(args),
+                           args.port, description="device=" + str(args.device))
     finally:
         dev.close()