Index: excitation.c
===================================================================
--- excitation.c	(nonexistent)
+++ excitation.c	(revision 24593)
@@ -0,0 +1,32 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  pcb-rnd, interactive printed circuit board design
+ *  Copyright (C) 2019 Tibor 'Igor2' Palinkas
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Contact:
+ *    Project page: http://repo.hu/projects/pcb-rnd
+ *    lead developer: http://repo.hu/projects/pcb-rnd/contact.html
+ *    mailing list: pcb-rnd (at) list.repo.hu (send "subscribe")
+ */
+
+#include "config.h"
+
+static const char *pcb_openems_excitation_get(pcb_board_t *pcb)
+{
+	return "DUMMY_EXCITATION";
+}
Index: export_openems.c
===================================================================
--- export_openems.c	(revision 24592)
+++ export_openems.c	(revision 24593)
@@ -58,6 +58,8 @@
 
 const char *openems_cookie = "openems HID";
 
+#include "excitation.c"
+
 #define MESH_NAME "openems"
 
 typedef struct hid_gc_s {
@@ -144,13 +146,9 @@
 	 PCB_HATT_INTEGER, 0, 10, {0, 0, 0}, 0, 0},
 #define HA_base_prio 12
 
-	{"excite", "Excite directive",
-	 PCB_HATT_STRING, 0, 0, {0, "SetGaussExcite(FDTD, f0, fc)", 0}, 0, 0},
-#define HA_excite 13
-
 	{"port-resistance", "default port resistance",
 	 PCB_HATT_REAL, 0, 1000, {0, 0, 50}, 0, 0}
-#define HA_def_port_res 14
+#define HA_def_port_res 13
 
 };
 
@@ -174,7 +172,6 @@
 	}
 
 TODO(": when export dialogs change into DAD, this hack to convert the strings to allocated ones will not be needed anymore")
-	openems_attribute_list[HA_excite].default_val.str_value = pcb_strdup(openems_attribute_list[HA_excite].default_val.str_value);
 	openems_attribute_list[HA_def_copper_cond].default_val.str_value = pcb_strdup(openems_attribute_list[HA_def_copper_cond].default_val.str_value);
 	openems_attribute_list[HA_def_subst_epsilon].default_val.str_value = pcb_strdup(openems_attribute_list[HA_def_subst_epsilon].default_val.str_value);
 	openems_attribute_list[HA_def_subst_mue].default_val.str_value = pcb_strdup(openems_attribute_list[HA_def_subst_mue].default_val.str_value);
@@ -525,10 +522,8 @@
 
 	fprintf(ctx->fsim, "%%%%%% Board mesh, part 1\n");
 	fprintf(ctx->fsim, "unit = 1.0e-3;\n");
-	fprintf(ctx->fsim, "f0 = 1.1e9; %% pulse center frequency\n");
-	fprintf(ctx->fsim, "fc = 0.9e9; %% \"20dB cutoff frequency --> bandwidth is 2*fc\n");
 	fprintf(ctx->fsim, "FDTD = InitFDTD();\n");
-	fprintf(ctx->fsim, "FDTD = %s;\n", ctx->options[HA_excite].str_value);
+	fprintf(ctx->fsim, "FDTD = %s;\n", pcb_openems_excitation_get(ctx->pcb));
 
 	if (mesh != NULL) {