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	<title>Sharing Knowledge</title>
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	<link>http://tbhermawan.wordpress.com</link>
	<description>Tb. Hermawan A.</description>
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		<title>Sharing Knowledge</title>
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			<item>
		<title>Standar Prosedur Penggantian Frekuensi BS Aperto PacketWave</title>
		<link>http://tbhermawan.wordpress.com/2008/12/30/standar-prosedur-penggantian-frekuensi-bs-aperto-packetwave/</link>
		<comments>http://tbhermawan.wordpress.com/2008/12/30/standar-prosedur-penggantian-frekuensi-bs-aperto-packetwave/#comments</comments>
		<pubDate>Tue, 30 Dec 2008 04:26:00 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Aperto Networks]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/?p=48</guid>
		<description><![CDATA[ Contoh kasus:
Penggantian frekuensi pada BS WSS-4
Frekuensi asal: 2687 MHz
Frekuensi baru: 2680 MHz

Tahapan penggantian:
1. Pastikan frekuensi pengganti benar-benar bersih.
2. Browse semua CPE yang terhubung ke WSS/ sector terkait (misal IP salah satu CPE: 10.4.65.15).
3. Isi kolom Frequency Table (MHz) di tiap-tiap CPE dengan nilai frekuensi yang baru pada menu Configuration \ Wireless Interface \ Frequency [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=48&subd=tbhermawan&ref=&feed=1" />]]></description>
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	</item>
		<item>
		<title>RF Signal Quality – No Energy Count (No Energy Error)</title>
		<link>http://tbhermawan.wordpress.com/2007/10/22/rf-signal-quality-%e2%80%93-no-energy-count-no-energy-error/</link>
		<comments>http://tbhermawan.wordpress.com/2007/10/22/rf-signal-quality-%e2%80%93-no-energy-count-no-energy-error/#comments</comments>
		<pubDate>Mon, 22 Oct 2007 05:26:19 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Aperto Networks]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/10/22/rf-signal-quality-%e2%80%93-no-energy-count-no-energy-error/</guid>
		<description><![CDATA[No energy error counters when scheduled packet did not arrive, or arrived with very low power level (below the minimum energy level threshold).
&#160;
 
@ BSU: error count increases for each frame that does not have contention traffic. NORMAL
 
&#160;
@ SU: Numerous NO ENERGY errors usually indicate a VERY low signal level. SU should be pointed [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=29&subd=tbhermawan&ref=&feed=1" />]]></description>
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	</item>
		<item>
		<title>Aperto Subscriber Unit (SU) Issues</title>
		<link>http://tbhermawan.wordpress.com/2007/10/22/aperto-subscriber-unit-su-issues/</link>
		<comments>http://tbhermawan.wordpress.com/2007/10/22/aperto-subscriber-unit-su-issues/#comments</comments>
		<pubDate>Mon, 22 Oct 2007 05:05:49 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Aperto Networks]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/10/22/aperto-subscriber-unit-su-issues/</guid>
		<description><![CDATA[SU Synchronization Issues

Incorrect Frequency
Incorrect Channel Width
Incorrect BSU ID
BSU wireless port is not operational
SU Indoor Unit failed to detect the Outdoor      Unit
SU antenna is not pointed correctly
The SU is out of range from the BSU and is not      able to receive any signal from the BSU

&#160;
SU [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=28&subd=tbhermawan&ref=&feed=1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<item>
		<title>Interference of Waves</title>
		<link>http://tbhermawan.wordpress.com/2007/09/07/interference-of-waves/</link>
		<comments>http://tbhermawan.wordpress.com/2007/09/07/interference-of-waves/#comments</comments>
		<pubDate>Fri, 07 Sep 2007 02:43:37 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Antenna & Propagation]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/09/07/interference-of-waves/</guid>
		<description><![CDATA[As most commonly used, the term interference usually refers to the interaction of waves which are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.
Wave interference is the phenomenon which occurs when two waves meet while traveling along the [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=23&subd=tbhermawan&ref=&feed=1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<media:content url="http://tbhermawan.files.wordpress.com/2007/09/u10l3c1.gif" medium="image">
			<media:title type="html">Wave interference</media:title>
		</media:content>

		<media:content url="http://tbhermawan.files.wordpress.com/2007/09/u10l3c2.gif" medium="image">
			<media:title type="html">Constructive interference</media:title>
		</media:content>

		<media:content url="http://tbhermawan.files.wordpress.com/2007/09/u10l3c3.gif" medium="image">
			<media:title type="html">Destructive interference 1</media:title>
		</media:content>

		<media:content url="http://tbhermawan.files.wordpress.com/2007/09/u10l3c4.gif" medium="image">
			<media:title type="html">Destructive interference 2</media:title>
		</media:content>
	</item>
		<item>
		<title>OFDM Basics</title>
		<link>http://tbhermawan.wordpress.com/2007/08/26/ofdm-basics/</link>
		<comments>http://tbhermawan.wordpress.com/2007/08/26/ofdm-basics/#comments</comments>
		<pubDate>Sun, 26 Aug 2007 14:43:03 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[WiMAX]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/08/26/ofdm-basics/</guid>
		<description><![CDATA[Orthogonal frequency division multiplexing (OFDM) belongs to a family of transmission schemes called multicarrier modulation, which is based on the idea of dividing a given high-bit-rate data stream into several parallel lower bit-rate streams and modulating each stream on separate carriers—often called subcarriers, or tones. Multicarrier modulation schemes eliminate or minimize inter-symbol interference (ISI) by [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=19&subd=tbhermawan&ref=&feed=1" />]]></description>
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			<media:title type="html">tbhermawan</media:title>
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	</item>
		<item>
		<title>WiMAX QoS</title>
		<link>http://tbhermawan.wordpress.com/2007/07/31/wimax-qos/</link>
		<comments>http://tbhermawan.wordpress.com/2007/07/31/wimax-qos/#comments</comments>
		<pubDate>Tue, 31 Jul 2007 03:57:48 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[WiMAX]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/07/31/wimax-qos/</guid>
		<description><![CDATA[        Support for QoS is a fundamental part of the WiMAX MAC-layer design. WiMAX borrows some of the basic ideas behind its QoS design from the DOCSIS cable modem standard. Strong QoS control is achieved by using a connection-oriented MAC architecture, where all downlink and uplink connections are [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=15&subd=tbhermawan&ref=&feed=1" />]]></description>
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			<media:title type="html">WiMAX Service Flows</media:title>
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	</item>
		<item>
		<title>Standard Operating Procedure &#8211; BSR Stopped Issue</title>
		<link>http://tbhermawan.wordpress.com/2007/06/22/standard-operating-procedure-bsr-stopped-issue/</link>
		<comments>http://tbhermawan.wordpress.com/2007/06/22/standard-operating-procedure-bsr-stopped-issue/#comments</comments>
		<pubDate>Fri, 22 Jun 2007 03:23:34 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Aperto Networks]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/06/22/standard-operating-procedure-bsr-stopped-issue/</guid>
		<description><![CDATA[Gambar di bawah ini menerangkan proses penanganan masalah jika diketahui BSU Radio Status adalah Stopped:
 
Prosedur di atas dibuat berdasarkan data dan pengalaman di lapangan.

       <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=12&subd=tbhermawan&ref=&feed=1" />]]></description>
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		<media:content url="http://tbhermawan.files.wordpress.com/2008/02/bsr-stopped-ver2.jpg" medium="image">
			<media:title type="html">Prosedur Penanganan BSU Radio Stopped</media:title>
		</media:content>
	</item>
		<item>
		<title>89 &#8211; Code:1 Task SUSP tWCx</title>
		<link>http://tbhermawan.wordpress.com/2007/06/11/89-code1-task-susp-twcx/</link>
		<comments>http://tbhermawan.wordpress.com/2007/06/11/89-code1-task-susp-twcx/#comments</comments>
		<pubDate>Mon, 11 Jun 2007 04:48:50 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Aperto Networks]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/06/11/89-code1-task-susp-twcx/</guid>
		<description><![CDATA[The &#8220;89 – Code:1 Task SUSP tWCx&#8221;  is a minor error code and will not affect the system&#8217;s performance.  This error code refers to a delay in execution of a task; however, once the delay or a single instance is triggered, the error code is reported continuously, regardless of whether the condition is [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=7&subd=tbhermawan&ref=&feed=1" />]]></description>
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			<media:title type="html">Task SUSP tWCx</media:title>
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	</item>
		<item>
		<title>Burst Error Rate (BER)</title>
		<link>http://tbhermawan.wordpress.com/2007/06/10/burst-error-rate-ber/</link>
		<comments>http://tbhermawan.wordpress.com/2007/06/10/burst-error-rate-ber/#comments</comments>
		<pubDate>Sun, 10 Jun 2007 06:29:36 +0000</pubDate>
		<dc:creator>RF Engineering</dc:creator>
				<category><![CDATA[Aperto Networks]]></category>

		<guid isPermaLink="false">http://tbhermawan.wordpress.com/2007/06/10/burst-error-rate-ber/</guid>
		<description><![CDATA[Burst error rate, BER, is cumulative ratio of burst errors to total number of received bursts in percentage format.

BER Includes:
- Uncorrectable FEC
Uncorrectable FEC (forward error correction) is a condition where valid burst was received and demodulated; however, there were more errors in the burst than could be corrected by the FEC.
High number of uncorrectable FEC [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=tbhermawan.wordpress.com&blog=990917&post=6&subd=tbhermawan&ref=&feed=1" />]]></description>
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		<slash:comments>3</slash:comments>
	
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		<media:content url="http://tbhermawan.files.wordpress.com/2007/06/rfsignalquality.jpg" medium="image">
			<media:title type="html">BER</media:title>
		</media:content>
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