diff --git a/hardware/fpga_pulser/ok_fpga_pulser.py b/hardware/fpga_pulser/ok_fpga_pulser.py
index 33e3272e30..114f7536a4 100644
--- a/hardware/fpga_pulser/ok_fpga_pulser.py
+++ b/hardware/fpga_pulser/ok_fpga_pulser.py
@@ -29,6 +29,12 @@
 
 class OkFpgaPulser(Base, PulserInterface):
     """Methods to control Pulse Generator running on OK FPGA.
+
+    Chan   PIN
+    ----------
+    Ch1    A3
+    Ch2    C5
+    Ch3    D6
     """
     _modclass = 'pulserinterface'
     _modtype = 'hardware'