diff --git a/radio/blocks/sinks/gnuplotplot.lua b/radio/blocks/sinks/gnuplotplot.lua
index d466645df..38c27d0cb 100644
--- a/radio/blocks/sinks/gnuplotplot.lua
+++ b/radio/blocks/sinks/gnuplotplot.lua
@@ -18,7 +18,7 @@
 -- @signature in:Float32 >
 --
 -- @usage
--- -- Plot a 1 KHz cosine sampled at 250 KHz
+-- -- Plot a 1 kHz cosine sampled at 250 kHz
 -- local snk = radio.SignalSource('cosine', 1e3, 250e3)
 -- local throttle = radio.ThrottleBlock()
 -- local snk = radio.GnuplotPlotSink(1000, 'Cosine')
diff --git a/radio/blocks/sinks/gnuplotspectrum.lua b/radio/blocks/sinks/gnuplotspectrum.lua
index 9d41189c5..8b264f53d 100644
--- a/radio/blocks/sinks/gnuplotspectrum.lua
+++ b/radio/blocks/sinks/gnuplotspectrum.lua
@@ -25,7 +25,7 @@
 -- @signature in:Float32 >
 --
 -- @usage
--- -- Plot the spectrum of a 1 KHz complex exponential sampled at 250 KHz
+-- -- Plot the spectrum of a 1 kHz complex exponential sampled at 250 kHz
 -- local snk = radio.SignalSource('exponential', 1e3, 250e3)
 -- local throttle = radio.ThrottleBlock()
 -- local snk = radio.GnuplotSpectrumSink()
diff --git a/radio/blocks/sinks/gnuplotwaterfall.lua b/radio/blocks/sinks/gnuplotwaterfall.lua
index 66f0e8b79..0ee9bdedd 100644
--- a/radio/blocks/sinks/gnuplotwaterfall.lua
+++ b/radio/blocks/sinks/gnuplotwaterfall.lua
@@ -30,7 +30,7 @@
 -- @signature in:Float32 >
 --
 -- @usage
--- -- Plot the waterfall of a 1 KHz complex exponential sampled at 250 KHz
+-- -- Plot the waterfall of a 1 kHz complex exponential sampled at 250 kHz
 -- local snk = radio.SignalSource('exponential', 1e3, 250e3)
 -- local throttle = radio.ThrottleBlock()
 -- local snk = radio.GnuplotSpectrumSink()
diff --git a/radio/blocks/sinks/gnuplotxyplot.lua b/radio/blocks/sinks/gnuplotxyplot.lua
index b09c3e4b5..e8157f365 100644
--- a/radio/blocks/sinks/gnuplotxyplot.lua
+++ b/radio/blocks/sinks/gnuplotxyplot.lua
@@ -23,7 +23,7 @@
 -- @signature in:ComplexFloat32 >
 --
 -- @usage
--- -- Plot a 1 KHz complex exponential sampled at 250 KHz
+-- -- Plot a 1 kHz complex exponential sampled at 250 kHz
 -- local snk = radio.SignalSource('exponential', 1e3, 250e3)
 -- local throttle = radio.ThrottleBlock()
 -- local snk = radio.GnuplotXYPlotSink(1000, 'Complex Exponential', {complex = true})