diff --git a/2118-2128.tex b/2118-2128.tex
index c3f1141..7a81031 100644
--- a/2118-2128.tex
+++ b/2118-2128.tex
@@ -437,27 +437,27 @@ Timing accuracy in the examples below is well under 1 nanosecond thanks to the A
 
 \subsection{One pulse per second}
 The channel should be configured as output in both the gateware and hardware.
-\inputcolorboxminted{firstline=9,lastline=15}{examples/ttl.py}
+\inputcolorboxminted{firstline=9,lastline=14}{examples/ttl.py}
 
 \newpage
 
 \subsection{Morse code}
 This example demonstrates some basic algorithmic features of the ARTIQ-Python language.
-\inputcolorboxminted{firstline=23,lastline=40}{examples/ttl.py}
+\inputcolorboxminted{firstline=22,lastline=39}{examples/ttl.py}
 
 \subsection{Counting rising edges in a 1ms window}
 The channel should be configured as input in both the gateware and hardware.
-\inputcolorboxminted{firstline=48,lastline=53}{examples/ttl.py}
+\inputcolorboxminted{firstline=47,lastline=52}{examples/ttl.py}
 
 This example code uses the software counter, which has a maximum count rate of approximately 1 million events per second.
 If the gateware counter is enabled on the TTL channel, it can typically count up to 125 million events per second:
-\inputcolorboxminted{firstline=61,lastline=66}{examples/ttl.py}
+\inputcolorboxminted{firstline=60,lastline=65}{examples/ttl.py}
 
 \newpage
 
 \subsection{Responding to an external trigger}
 One channel needs to be configured as input, and the other as output.
-\inputcolorboxminted{firstline=75,lastline=81}{examples/ttl.py}
+\inputcolorboxminted{firstline=74,lastline=80}{examples/ttl.py}
 
 \section{Ordering Information}
 To order, please visit \url{https://m-labs.hk} and select the 2118 BNC-TTL/2128 SMA-TTL in the ARTIQ Sinara crate configuration tool. The card may also be ordered separately by writing to \url{mailto:sales@m-labs.hk}.
diff --git a/2238.tex b/2238.tex
index 46332ff..29dad99 100644
--- a/2238.tex
+++ b/2238.tex
@@ -563,24 +563,24 @@ Timing accuracy in the examples below is well under 1 nanosecond thanks to the A
 
 \subsection{One pulse per second}
 The channel should be configured as output in both the gateware and hardware.
-\inputcolorboxminted{firstline=9,lastline=15}{examples/ttl.py}
+\inputcolorboxminted{firstline=9,lastline=14}{examples/ttl.py}
 
 \subsection{Morse code}
 This example demonstrates some basic algorithmic features of the ARTIQ-Python language.
-\inputcolorboxminted{firstline=23,lastline=40}{examples/ttl.py}
+\inputcolorboxminted{firstline=22,lastline=39}{examples/ttl.py}
 
 \newpage
 \subsection{Counting rising edges in a 1ms window}
 The channel should be configured as input in both the gateware and hardware.
-\inputcolorboxminted{firstline=48,lastline=53}{examples/ttl.py}
+\inputcolorboxminted{firstline=47,lastline=52}{examples/ttl.py}
 
 This example code uses the software counter, which has a maximum count rate of approximately 1 million events per second.
 If the gateware counter is enabled on the TTL channel, it can typically count up to 125 million events per second:
-\inputcolorboxminted{firstline=61,lastline=66}{examples/ttl.py}
+\inputcolorboxminted{firstline=60,lastline=65}{examples/ttl.py}
 
 \subsection{Responding to an external trigger}
 One channel needs to be configured as input, and the other as output.
-\inputcolorboxminted{firstline=75,lastline=81}{examples/ttl.py}
+\inputcolorboxminted{firstline=74,lastline=80}{examples/ttl.py}
 
 \section{Ordering Information}
 To order, please visit \url{https://m-labs.hk} and select the 2238 MCX-TTL in the ARTIQ Sinara crate configuration tool. The card may also be ordered separately by writing to \url{mailto:sales@m-labs.hk}.
diff --git a/2245.tex b/2245.tex
index 79da33e..c495a02 100644
--- a/2245.tex
+++ b/2245.tex
@@ -469,24 +469,24 @@ Timing accuracy in the examples below is well under 1 nanosecond thanks to the A
 
 \subsection{One pulse per second}
 The channel should be configured as output in both the gateware and hardware.
-\inputcolorboxminted{firstline=9,lastline=15}{examples/ttl.py}
+\inputcolorboxminted{firstline=9,lastline=14}{examples/ttl.py}
 
 \subsection{Morse code}
 This example demonstrates some basic algorithmic features of the ARTIQ-Python language.
-\inputcolorboxminted{firstline=23,lastline=40}{examples/ttl.py}
+\inputcolorboxminted{firstline=22,lastline=39}{examples/ttl.py}
 
 \newpage
 \subsection{Counting rising edges in a 1ms window}
 The channel should be configured as input in both the gateware and hardware.
-\inputcolorboxminted{firstline=48,lastline=53}{examples/ttl.py}
+\inputcolorboxminted{firstline=47,lastline=52}{examples/ttl.py}
 
 This example code uses the software counter, which has a maximum count rate of approximately 1 million events per second.
 If the gateware counter is enabled on the TTL channel, it can typically count up to 125 million events per second:
-\inputcolorboxminted{firstline=61,lastline=66}{examples/ttl.py}
+\inputcolorboxminted{firstline=60,lastline=65}{examples/ttl.py}
 
 \subsection{Responding to an external trigger}
 One channel needs to be configured as input, and the other as output.
-\inputcolorboxminted{firstline=75,lastline=81}{examples/ttl.py}
+\inputcolorboxminted{firstline=74,lastline=80}{examples/ttl.py}
 
 \section{Ordering Information}
 To order, please visit \url{https://m-labs.hk} and select the 2245 LVDS-TTL in the ARTIQ Sinara crate configuration tool. The card may also be ordered separately by writing to \url{mailto:sales@m-labs.hk}.
diff --git a/examples/ttl.py b/examples/ttl.py
index 01080eb..b98603e 100644
--- a/examples/ttl.py
+++ b/examples/ttl.py
@@ -9,7 +9,6 @@ class OnePulsePerSecond(EnvExperiment):
     @kernel
     def run(self):
         self.core.reset()
-        self.core.break_realtime()
         while True:
             self.ttl0.pulse(500*ms)
             delay(500*ms)