diff --git a/st_record.py b/st_record.py
index 4c6b2c4..f9fd0ac 100644
--- a/st_record.py
+++ b/st_record.py
@@ -26,6 +26,25 @@ def human_readable_size(size, decimal_places=2):
         size /= 1024.0
     return f"{size:.{decimal_places}f} {unit}"
 
+def parse_time(timestring):
+    prefixes = {
+        'p':10e-12,
+        'n':10e-9,
+        'u':10e-6,
+        'm':10e-3,
+    }
+    for prefix,factor in prefixes.items():
+        unit = prefix+'s'
+        # found unit in string
+        if unit in timestring:
+            # remove unit from string, strip any whitespace before it and parse as float
+            time = float(timestring.split(unit)[0].rstrip(" "))
+            return time*factor
+
+    # no unit attached, assuming seconds
+    return float(timestring)
+
+
 def is_hex(s):
     return all(chr(c) in '0123456789abcdefABCDEF' for c in s)
 
@@ -532,8 +551,17 @@ def main():
         nfile = open(noisefile, 'wb')
         packet_filter.onnoise(lambda b: nfile.write(b.to_bytes(1)))
 
+    # remove diagnostic signal from view
+    signals = [s for s in signals if s not in predefined_signals]
+    # convert timescale to seconds
+    timescale = parse_time(timescale)
+
+    # start recording
     if enable_tui:
-        tui_record(signals, packet_filter, vcd_sink, enable_verbose_trace)
+        if enable_verbose_trace:
+            print("warning: verbose trace is not avaialble in TUI mode")
+            print()
+        tui_record(signals, packet_filter, vcd_sink, timescale)
     else:
         record(signals, packet_filter, vcd_sink, enable_verbose_trace)
 
@@ -607,10 +635,12 @@ class TotalMaximumProgressUpdater:
         self.progress.update(self.progress_task, completed=value, visible=True)
 
 class SignalTable:
-    def __init__(self, signals):
+    def __init__(self, signals, update_interval=1000000):
         self.values = {}
         self.arraycache = {}
         self.types = {}
+        self.lastupdate = {}
+        self.update_interval = update_interval
 
         for signal in signals:
             name,value_type = signal.split(":")
@@ -620,9 +650,17 @@ class SignalTable:
                 array_len = int(s[1].split("]")[0], 0)
                 self.arraycache[name] = [None] * array_len
             self.types[name] = value_type
+            self.lastupdate[name] = 0
 
     def update(self, time, signal, value, sub):
-        try:
+        if signal in self.values:
+            not_enough_time_passed = (time - self.lastupdate[signal]) < self.update_interval
+            is_array = signal in self.arraycache
+            is_last_array_index = is_array and (sub == (len(self.arraycache[signal])))
+            if not_enough_time_passed and is_last_array_index:
+                return
+            self.lastupdate[signal] = time
+
             value_str = ""
             value_type = self.types[signal]
 
@@ -633,24 +671,22 @@ class SignalTable:
                     value_str = f"x{value:04X}"
                 case "u32"|"s32":
                     value_str = f"x{value:08X}"
+                case "f32":
+                    value_str = str(value)
                 case "string":
                     value_str = value.rstrip("\r\n")
                 case "event":
                     value_str = str(time)
 
-            if (signal in self.arraycache) and (sub is not None):
+            if is_array and (sub is not None):
                 if sub >= len(self.arraycache[signal]):
                     self.arraycache[signal].extend([0] * (sub - len(self.arraycache[signal]) + 1))
                 self.arraycache[signal][sub] = value_str
                 value_str = "[" + ", ".join(['X' if x is None else x for x in self.arraycache[signal]]) + "]"
 
             self.values[signal] = value_str
-        except Exception as e:
-            print("EEE", e)
-            print(f"{sub=} {signal=} {len(self.arraycache[signal])=}")
-            print('Error on line {}'.format(sys.exc_info()[-1].tb_lineno), type(e).__name__, e)
 
-def tui_record(signals, packet_filter, vcd_sink, enable_verbose_trace):
+def tui_record(signals, packet_filter, vcd_sink, timescale):
     try:
         from rich.console import Console
         from rich.text import Text
@@ -663,10 +699,6 @@ def tui_record(signals, packet_filter, vcd_sink, enable_verbose_trace):
         print("error: TUI mode requires the rich package")
         exit()
 
-    if enable_verbose_trace:
-        print("warning: verbose trace is not avaialble in TUI mode")
-        print()
-
     console = Console()
     noise_buffer = NoiseLineBuffer(lambda text: console.print(f"[blue]{text}"))
     trace_text = Text("")
@@ -693,7 +725,9 @@ def tui_record(signals, packet_filter, vcd_sink, enable_verbose_trace):
     comp_time_tm = TotalMaximumProgressUpdater(diag_progress, comp_time)
 
     # set up table layout and signal view
-    signal_values = SignalTable(signals)
+    # set its update interval to 0.2 seconds in ticks
+    signal_update_interval = int(0.2/timescale)
+    signal_values = SignalTable(signals, signal_update_interval)
     vcd_sink.onanyvalue(signal_values.update)
 
     def generate_table(diag_progress, signal_values):