diff --git a/projects/adaq7980_sdz/common/adaq7980_bd.tcl b/projects/adaq7980_sdz/common/adaq7980_bd.tcl
index 508b87f22..e4d1d6c56 100644
--- a/projects/adaq7980_sdz/common/adaq7980_bd.tcl
+++ b/projects/adaq7980_sdz/common/adaq7980_bd.tcl
@@ -25,7 +25,9 @@ current_bd_instance /spi
 
   ## to setup the sample rate of the system change the PULSE_PERIOD value
   ## the acutal sample rate will be PULSE_PERIOD * (1/sys_cpu_clk)
-  ad_ip_parameter trigger_gen CONFIG.PULSE_PERIOD 100
+  set cycle_per_sec_100mhz 100000000
+  set sampling_cycle [expr int(ceil(double($cycle_per_sec_100mhz) / $adc_sampling_rate))]
+  ad_ip_parameter trigger_gen CONFIG.PULSE_PERIOD $sampling_cycle
   ad_ip_parameter trigger_gen CONFIG.PULSE_WIDTH 1
 
   ad_ip_parameter execution CONFIG.NUM_OF_CS 1
diff --git a/projects/adaq7980_sdz/zed/system_bd.tcl b/projects/adaq7980_sdz/zed/system_bd.tcl
index 5ccf29c95..ceaa440ca 100644
--- a/projects/adaq7980_sdz/zed/system_bd.tcl
+++ b/projects/adaq7980_sdz/zed/system_bd.tcl
@@ -1,4 +1,8 @@
 
 source $ad_hdl_dir/projects/common/zed/zed_system_bd.tcl
+
+# specify ADC sampling rate in samples/seconds -- default is 1 MSPS
+set adc_sampling_rate 1000000
+
 source ../common/adaq7980_bd.tcl