From 873c86c9cd81aab118f21ef1dfcc50846aa6c2ef Mon Sep 17 00:00:00 2001
From: Josh Bailey <josh@vandervecken.com>
Date: Thu, 21 Dec 2023 03:38:32 +0000
Subject: [PATCH] add slow stare warning.

---
 gamutrf/grscan.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gamutrf/grscan.py b/gamutrf/grscan.py
index 1d6e3597..5eff2092 100644
--- a/gamutrf/grscan.py
+++ b/gamutrf/grscan.py
@@ -77,8 +77,10 @@ def __init__(
         gr.top_block.__init__(self, "scan", catch_exceptions=True)
 
         tune_step_hz = int(samp_rate * tuneoverlap)
+        stare = False
 
         if freq_end == 0:
+            stare = True
             freq_end = freq_start + (tune_step_hz - 1)
             logging.info(
                 f"using stare mode, scan from {freq_start/1e6}MHz to {freq_end/1e6}MHz"
@@ -153,6 +155,8 @@ def __init__(
         logging.info(
             f"requested retuning across {freq_range/1e6}MHz every {tune_step_fft} FFTs, dwell time {tune_dwell_ms}ms"
         )
+        if stare and tune_dwell_ms > 1e3:
+            logging.warn(">1s dwell time in stare mode, updates will be slow!")
 
         self.fft_blocks = (
             self.get_dc_blocks(dc_block_len, dc_block_long)