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authorHarald Welte <laforge@gnumonks.org>2008-11-26 18:27:11 +0530
committerHarald Welte <laforge@gnumonks.org>2008-11-26 18:27:11 +0530
commiteb13897566ab93c56462b327b75bfd8eb317abc9 (patch)
tree25236eccb32b7908ef3aea9d279872751c6eec5d /gsm-tvoid/src
parent560e8fb53fdf3cb51fffe5bf86d8e8ffab0fee82 (diff)
Add function to get ARFCN from a known frequency
Diffstat (limited to 'gsm-tvoid/src')
-rwxr-xr-xgsm-tvoid/src/python/gsm_scan.py32
1 files changed, 32 insertions, 0 deletions
diff --git a/gsm-tvoid/src/python/gsm_scan.py b/gsm-tvoid/src/python/gsm_scan.py
index fab6ce8..a366960 100755
--- a/gsm-tvoid/src/python/gsm_scan.py
+++ b/gsm-tvoid/src/python/gsm_scan.py
@@ -127,6 +127,38 @@ def get_freq_from_arfcn(chan,region):
return freq * 1e6
+def get_arfcn_from_freq(freq,region):
+ freq = freq / 1e6
+ # GSM 450
+ if freq <= 450.6 + 0.2*(293 - 259) + 10:
+ arfcn = ((freq - (450.6 + 10)) / 0.2) + 259
+ # GSM 480
+ elif freq <= 479 + 0.2*(340 - 306) + 10:
+ arfcn = ((freq - (479 + 10)) / 0.2) + 306
+ # GSM 850
+ elif freq <= 824.2 + 0.2*(251 - 128) + 45:
+ arfcn = ((freq - (824.2 + 45)) / 0.2) + 128
+ #E/R-GSM 900
+ elif freq <= 890 + 0.2*(1023 - 1024) + 45:
+ arfcn = ((freq - (890 + 45)) / -0.2) + 955
+ # GSM 900
+ elif freq <= 890 + 0.2*124 + 45:
+ arfcn = (freq - (890 + 45)) / 0.2
+ else:
+ if region is "u":
+ if freq > 1850.2 + 0.2*(810 - 512) + 80:
+ arfcn = 0;
+ else:
+ arfcn = (freq - (1850.2 + 80) / 0.2) + 512
+ elif region is "e":
+ if freq > 1710.2 + 0.2*(885 - 512) + 95:
+ arfcn = 0;
+ else:
+ arfcn = (freq - (1710.2 + 95) / 0.2) + 512
+ else:
+ arfcn = 0
+
+ return arfcn
####################
class app_flow_graph(stdgui.gui_flow_graph):
personal git repositories of Harald Welte. Your mileage may vary