Looks like the problem is because of DTX because the FACCH bursts vanish during speech and return during pause.<div><br></div><div>Anyone has experience with DTX?<br><div><br></div><div>B.</div><div><br></div><div><br><br>
<div class="gmail_quote">On Fri, Feb 1, 2013 at 10:42 AM, Bhaskar11 <span dir="ltr">&lt;<a href="mailto:niceguy108@gmail.com" target="_blank">niceguy108@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Yes, I send the command<div><div><font face="courier new, monospace"><span style="white-space:pre-wrap">	</span>l1ctl_tx_fbsb_req(ms, ms-&gt;test_arfcn,</font></div><div><font face="courier new, monospace"><span style="white-space:pre-wrap">		</span>L1CTL_FBSB_F_FB0 | L1CTL_FBSB_F_SB, 100, 0,</font></div>

<div><font face="courier new, monospace"><span style="white-space:pre-wrap">		</span>app_state.ccch_mode, dbm2rxlev(-85));</font></div><div>before switching channels.</div><div><br></div><div>Now most of the channels stick on for much longer, but a few drop within seconds.</div>

<div><br></div><div>But I cannot know for sure if this has &quot;worked&quot; until I can decode and recognise some FACCH commands.</div><div><br></div><div>On AMR HR I get data like:</div><div><br></div><div><div>  TCH/H (hl=0, hu=0) in FN=1864368 DL SACCH</div>

<div>  Detected FACCH (hl=1, hu=0) in FN=1864369 DL</div><div>  Detected FACCH (hl=1, hu=0) in FN=1864371 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864373 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864375 DL</div>

<div>  Detected FACCH (hl=1, hu=1) in FN=1864386 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864388 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864390 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864392 DL</div>

<div>  TCH/H (hl=0, hu=0) in FN=1864394 DL SACCH</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864395 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864397 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864399 DL</div>

<div>  Detected FACCH (hl=1, hu=0) in FN=1864401 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864403 DL</div><div>  Detected FACCH (hl=1, hu=0) in FN=1864405 DL</div><div>  Detected FACCH (hl=1, hu=1) in FN=1864408 DL</div>

<div>  Detected FACCH (hl=1, hu=0) in FN=1864410 DL</div><div>  TCH/H (hl=0, hu=0) in FN=1864420 DL SACCH</div><div><br></div></div><div>which does not look correct because I think the FACCH should be in groups of 4.</div>

<div><br></div><div>Any explanations? Suggestions?</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>B.</div></font></span><div><div class="h5"><div><br></div><br><div class="gmail_quote">On Thu, Jan 31, 2013 at 8:38 PM, Pe <span dir="ltr">&lt;<a href="mailto:oxccoxcc@yandex.ru" target="_blank">oxccoxcc@yandex.ru</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, Bhaskar11<br>
Did you resolve problem with low snr?<br>
Do you make synchronization on SCH before going to TCH, after Assignment<br>
Command?<br>
<br>
<br>
<br>
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