How to read the statistics graph?

Hi,
I'm trying to troubleshoot some network issues. I have an AirPort Express connected to a DSL modem and acting as a wireless router. One computer connected is a Mac Pro with an AirPort Extreme card, and the other is a PC laptop with an Intel 2200BG wireless card. Both computers are connected, using the internet, sharing files, etc. I am using WPA2 encryption.
The Mac has a good stable connection while the PC disconnects frequently. The thing is that the PC is just a few feet away from the router, while the Mac is in the other room. Moreover, both computers show an excellent connection in their status.
I've opened Airport Utility in order to diagnose the problem. Looking at the statistics graph, I cannot seem to understand how to read it. I'm confused by the negative signals vs. noise signals, etc.
Unfortunately, I cannot post a screenshot here, but here are the readings:
PC: Signal: -24, Noise: -95, Rate: 54
Mac: Signal: -73, Noise: -84, Rate: 78
This is cryptic to me, so I'd appreciate any explanation of the data.
Thanks!

PC: Signal: -24, Noise: -95, Rate: 54
Mac: Signal: -73, Noise: -84, Rate: 78
In general, the greater the value, the better. Both Signal & Noise are measured in dBm. dBm is a measure of absolute power output. An increase in 10 dBm = 10x increase in output power.
We would use these values to calculate the Signal-to-Noise Ratio (SNR). SNR = Signal - Noise.
To use your measurements for examples, the SNR would be:
o PC: -24 dBm -(-95 dBm) = 71 dB
o Mac: -73 dBm -(-84 dBm) = 11 dB
To put this into perspective, the SNR influences the instantaneous data rate (speed). The higher the SNR, the higher the data rate (up to the maximum bandwidth of the radio being used).
For reference, use the following SNR Guideline:
o 40dB+ SNR = Excellent signal
o 25dB to 40dB SNR = Very good signal
o 15dB to 25dB SNR = Low signal
o 10dB to 15dB SNR = Very low signal
o 5dB to 10dB SNR = No signal
Again, going back to the SNRs we just calculated, the PC is getting an excellent connection to the AX, while the Mac is not.
Finally, the 'Rate" value is a near instantaneous measure of the data rate or throughput. It is measured in Mega bits per second (Mbps). Its value should never exceed the maximum bandwidth appropriate for the radio mode. For 802.11g that bandwidth would be 54 Mbps; for 802.11n (2.4 GHz), 130 Mbps, and for 802.11n (5 GHz), 300+ Mbps.

Similar Messages

How to lock the statistics in column level.

Hi All, i am using 10.2.0.1.0 version of oracle.
I have gathered freuency histogram manually on one of my column of a table to provide more information to optimizer for better calculation of cardinality.
Now i have my weekend job runs for gathering stats on schema level with method_opt as 'For all column size repeat'. But i dont want the stats of above column to be overridden by the stats job. I dont want to lock the statistics of whole table, but i just want to lock the column level stats for this table.
how the above can be achieved?
Below is the details.
Code for manual histogram , i have eliminated many buckets purposely, as there are 194 buckets.
DECLARE
m_distcnt NUMBER := 916714;       -- num_distinct (As it is there in dba_tab_columns)
m_density NUMBER := 0.00000109031397771616; -- density (As it is there in dba_tab_columns)
m_nullcnt NUMBER := 0;       -- num_nulls (As it is there in dba_tab_columns)
m_avgclen NUMBER := 8;       -- avg_col_len (As it is there in dba_tab_columns)
srec      dbms_stats.statrec;
n_array   dbms_stats.numarray;
BEGIN
srec.epc := 3; -- no of end points
n_array     := dbms_stats.numarray(3870     ,
                                             3891     ,
                                             3945
srec.bkvals := dbms_stats.numarray(25000     ,
                                             55000     ,
                                             100000     ,
dbms_stats.prepare_column_values(srec, n_array);
dbms_stats.set_column_stats('Schema1', 'USERS_HIST_TEST', 'COMPANYPK',
distcnt => m_distcnt,
density => m_density,
nullcnt => m_nullcnt,
srec    => srec,
avgclen => m_avgclen,
force => TRUE);
END;
-- Weekend job which will override above histogram
DBMS_STATS.GATHER_SCHEMA_STATS (
    ownname          => 'Schema1',
    estimate_percent => dbms_stats.auto_sample_size,
    block_sample     => FALSE,
    method_opt       => 'FOR ALL COLUMNS SIZE REPEAT',
    DEGREE           => dbms_stats.default_degree,
    granularity      => 'DEFAULT',
    CASCADE          => TRUE,
    options          => 'GATHER STALE'
Edited by: 930254 on Jul 4, 2012 9:08 AM

Pl do not post duplicate threads - How to lock the statistics in column level.

How to read the content in one node of XML in Java? Pls help

My dear brothers,
I am a newbie of XML, I have a exercise which is creating a Tree View from XML file. But the trouble is I do not know how to read the content in one node of XML file. I decide to use the algorithm as following:
1. Create a GUI form which gives the ability for user to choose a XML file (ok)
2. Load XML and return the file (ok)
3. Read the file from node to node to create the node in Tree View (?!)
Please help me, and if you are enough kind, please give me an small example to easy understand. Thanks in advance.
Hoang Yen Binh

I hope this one helps you.
 <ABC Type="ProductBased" ProdName="One" Location="India">
 <CEO>Raj</CEO>
 <Finance>Vikram</Finance>
 <HR>Karthik</HR>
 <Technical>Satish</Technical>
 </ABC>
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Attr;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.DOMException;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
public class XmlReading {
 Document doc;
 Element element;
 public static void main(String[] args) throws Exception{
 XmlReading xr = new XmlReading();
 xr.getXmlParser(args);
 public void getXmlParser(String[] args) {
 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 if(args.length != 1) {
 System.err.println("Argument Required");
 try {
 DocumentBuilder builder = factory.newDocumentBuilder();
 doc = builder.parse(new File(args[0]));
 }catch(ParserConfigurationException e1) {
 }catch(SAXException e2) {
 }catch(IOException e3) {
 getAttributes();
 public void getAttributes() {
 // Retrive the entire Document from the Dom Tree
 element = doc.getDocumentElement();
// System.out.println(element);
 NamedNodeMap attrs = element.getAttributes();
 // Get number of attributes in the element
 int numAttrs = attrs.getLength();
 // Process each attribute
 for (int i=0; i<numAttrs; i++) {
 Node node = attrs.item(i);
 // Get attribute name and value
 String attrName = node.getNodeName();
 String attrValue = node.getNodeValue();
 System.out.println(attrName + ": " + attrValue);
 String s1 = element.getTagName();
 System.out.println(s1);
 // To get all the elements in a DOM Tree
 NodeList nl1 = element.getElementsByTagName("*");
 int i2 = nl1.getLength();
 System.out.println(i2);
 for(int i=0; i<i2; i++) {
 System.out.println(nl1.item(i) + "\n");
}

How to read the data in excel sheet

Dear sir,
How to read the data in excel sheet when i recieve a data serial communication... ie i have store a data in excel such that
Cell A Cell B
A Apple
B Ball
C Cat
D Doll
when i recieve A from serial communication i have to display Apple, and when i recieve B i have to display Ball and so on..

Hi,
I would recommend you to have a look at the VI attached. It makes use of a VI named 'Read from Spreadsheet' to read the row and column data from the tab delimited excel file. The read data is then searched for the Alphabet specified and finally returns you the corresponding string. The test file used to validate the operation of the VI is also attached.
Trust this would help you solve the issue.
Regards,
Sagar G Yadav | Application Engineer | National Instruments
Attachments:
read_from_excel.vi ‏10 KB
Book1.txt ‏1 KB

How to read the file from a folder.

Hi All,
How to read the file from a folder or directory from the non sap server / remote server.
Regards
Sathis

open dataset filename for input in text mode
encoding default.
filename is character type variable with the destination filename.
Edited by: Jino Augustine on Apr 19, 2010 1:31 PM

How to read the check box value in alv report

hi experts,
i m working on one alv report where i m using the check box for field selection in alv display.
but i don't know how to read the only selected fields.
wa_fieldcat-fieldname = 'BOX'.
wa_fieldcat-tabname = 'IT_HEADER'.
wa_fieldcat-seltext_m = 'Box'.
wa_fieldcat-checkbox = 'X'.
wa_fieldcat-input = 'X'.
wa_fieldcat-edit = 'X'.
APPEND wa_fieldcat TO i_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'AUFNR'.
wa_fieldcat-tabname = 'IT_HEADER'.
wa_fieldcat-seltext_m = 'Sales Doc'.
wa_fieldcat-hotspot = 'X'.
APPEND wa_fieldcat TO i_fieldcat.
CLEAR wa_fieldcat.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
   EXPORTING
     i_callback_program                = v_repid
     I_CALLBACK_PF_STATUS_SET          = 'SET_PF_STATUS'
     i_callback_user_command           = 'USER_COMMAND'
     i_callback_top_of_page            = 'TOP_OF_PAGE'
     it_fieldcat                       = i_fieldcat[]
     i_save                            = 'A'
     it_events                         = v_events
    TABLES
      t_outtab                          = it_header
EXCEPTIONS
PROGRAM_ERROR                     = 1
OTHERS                            = 2
*&      Form USER_COMMAND
      text
     -->R_UCOMM    text
     -->,          text
     -->RS_SLEFIELDtext
FORM user_command USING r_ucomm LIKE sy-ucomm
rs_selfield TYPE slis_selfield.
CASE r_ucomm.
when '&RELEAS'.
endcase
endform.
i gone through some already posted que for same problem i tried options like
loop at it_header.
endloop.
but i m getting box field empty.
is there i missed something? plz sugeest.. if u have any other solution plz post...

Have this code in your user command fm:
* For capturing changed data
CALL FUNCTION 'GET_GLOBALS_FROM_SLVC_FULLSCR'
    IMPORTING
      e_grid = w_grid.
CALL METHOD w_grid->check_changed_data
    IMPORTING
      e_valid = w_valid.
IF w_valid = 'X'.
loop at itab where mark = 'X'.
endloop.
ENDIF.
Regards,
Ravi

How to read the Variance Analysis report S_ALR_87013139, Pdt cost by Order

Hi,
Could someone tell me how to read the variance analysis report, S_ALR_87013139 - Cumulative for product cost by order. The report has the following fields, Target (Debits),     Actual (Debits),     Scrap,     Var. Without Scrap,     Work in Process(WIP),     Control Costs.
I am looking to find how the numbers add up.
Thanks for your help.
Ram
Message was edited by:
        Ram R

Thanks Sridhar,
When I analyse the report S_ALR_87013139 - Cumulative , for a product for a period (with no scrap), I get the following
Target (Deb) -   46,855.55
Act (Deb) - 58,315.87
Scrap - 0.00
Var W/O- Scrap - 11,269
WIP- 0
Control Cost - 0
Here Actual - Target is not equal to Variance. What could be the issue?
Could you please tell me how SAP would update this report with target & actual costs with respect to open production orders, carried over from previous periods.
Thanks,
Ram

How to read the contents of attached files

Hi,
I am designing a Form using LiveCycle Designer 8.0
Scenario:
User can attach the file through "Attachments" facility provided on Adobe Reader.
The requirement is to attach 3 documents and post it to SAP system using Web services.
I am using the following code(which i got from this forum only) to find the number of files user has attached.
d = event.target.dataObjects;
n = d.length;
xfa.host.messageBox("Number of Attachments: "+n);
//Displaying the names of the Attached files
for( i = 0; i < n; i++ )
xfa.host.messageBox("Name of the file: "+d[i].name);
My problem: is how to read the contents of the attached files so that I post it to SAP using Web services
Thanks in advance!!
Taha Ahmed

In order to read the content of the Redo Log files, you should use Logminer Utility
Please refer to the documentation for more information:
[Using LogMiner to Analyze Redo Log Files|http://download.oracle.com/docs/cd/B19306_01/server.102/b14215/logminer.htm#SUTIL019]
Kamran Agayev A. (10g OCP)
http://kamranagayev.wordpress.com
[Step by Step install Oracle on Linux and Automate the installation using Shell Script |http://kamranagayev.wordpress.com/2009/05/01/step-by-step-installing-oracle-database-10g-release-2-on-linux-centos-and-automate-the-installation-using-linux-shell-script/]

How to read the and Write the PDF file give me the solution

Hi all,
How to read the and Write the PDF file give me the solution
My coding is
import java.io.File;
import com.asprise.util.pdf.PDFImageWriter;
import com.asprise.util.pdf.PDFReader;
import java.io.*;
import java.io.FileOutputStream;
public class example {
// public example() {
 public static void main(String a[])
 try
 PDFReader reader = new PDFReader(new File("C:\\AsprisePDF-DevGuide.pdf"));
 reader.open(); // open the file.
 int pages = reader.getNumberOfPages();
 for(int i=0; i < pages; i++) {
 String text = reader.extractTextFromPage(i);
 System.out.println("Page " + i + ": " + text);
// perform other operations on pages.
PDFImageWriter writer = new PDFImageWriter(new FileOutputStream("c:\\new11.pdf"));
 writer.open();
 writer.addImage("C:\\sam.doc");
 writer.close();
 System.out.println("DONE.");
reader.close();
 catch(Exception e){System.out.println("error:"+e);
 e.printStackTrace();
I get the pdf content then it returns the string value but ther is no option to write the string to PDF, and we only add a image file to PDF,but i want to know how to wrote the string value to PDF file,
Please give response immtly
i am waiting for your reply.
thanks,
Suresh.G

I have some question flow
How library to use this code.
I try runing but have not libary.
Please send me it'library
Thank you very much!

How to read the data from Excel file and Store in XML file using java

Hi All,
I got a problem with Excel file.
My problem is how to read the data from Excel file and Store in XML file using java excel api.
For getting the data from Excel file what are all the steps i need to follow to get the correct result.
Any body can send me the code (with java code ,Excel sheet) to this mail id : [email protected]
Thanks & Regards,
Sreenu,
[email protected],
india,

If you want someone to do your work, please have the courtesy to provide payment.
http://www.rentacoder.com

Help me...How to read the content if "Transfer-Encoding:chunked" is used?

I am doing a project for internet control using Java,PHP and MySql.All sites should go through the proxy server only.If the HTTP header contains Content-Length,am getting the content length as below:
public class HTTPResponseReader extends HTTPMessageReader
    String statusCode;
    public HTTPResponseReader(InputStream istream) throws IOException,                     NoSuchElementException
BufferedInputStream distream = new BufferedInputStream(istream);
retrieveHeader(distream);
StringTokenizer st = new StringTokenizer(new String(HTTPMessageReader.toArray(header)));
versionProtocol = st.nextToken();
statusCode = st.nextToken();
String s;
while (st.hasMoreTokens())
        s = st.nextToken();
        if (s.equals("Transfer-Encoding:"))
       transferEncoding = new String(st.nextToken());
     if (s.equals("Content-Length:"))
       contentLength = Integer.parseInt(st.nextToken());
     if (s.equals("Connection:"))
      connection = new String(st.nextToken());
      if (connection.equals("keep-alive")) mustCloseConnection = false;
   retrieveBody(distream);
}After getting the Content-Length,i used read method to read the content upto that content length.Then i concatenated the HTTP header and body and the requested site was opened.But some sites dont have Content-Length.Instead of that,Transfer-Encoding is used.I got the HTTP Response header as "Transfer-Encoding:chunked" for some sites.If this encoding is used how to get the length of the message body and how to read the content.
Can anybody help me.
Thanks in advance...
Message was edited by:
VeeraLakshmi

Why don't you use HttpUrlConnection class to retrieve data from HTTP server? This class already supports chunked encoding...
If you want to do anything by yourself then you need to read HTTP RFC and find all required information. Well in two words you may reject advanced encoding by specifying HTTP 1.0 in your request or download chunked answer manually. Read RFC anyway :)

How to read the content of a text file (by character)?

Guys,
Good day!
I'm back just need again your help. Is there anyone knows how to read the content of a text file not by line but by character.
Please help me. Thank you so much in advance.
Jojo

http://java.sun.com/javase/6/docs/api/index.html
package java.io
InputStream.read(): int
Reads the next byte of data from the input stream.
Implementation:
InputStreamReader
An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset may be accepted.

Help on how to read the content of an XML file from the payload

I have a receiver channel / mail adapter, that sends e-mails with a XML attachment.
Im trying to write a Bean, that should make it possible to rename the attached XML file dynamically.
In the Bean I want to read the content of the attached XML file, it could be the order number.
The filename should then be Order number.XML.
Can anyone help me with how to read the content of the XML file from the payload.
Frank

hi,
check this: http://jakarta.apache.org/poi/

How to read the whole name of a music title while scrolling down a list of titles? With the new iOs7 Music App there is no more black box showing the entire name!

How to read the whole name of a music title while scrolling down a list of titles? The old software-app had the function to click for a longer time on a titles beginning letters until a black box revealed the entire name. I miss this function especially for my classical music, because lots of pieces start with similar words. E.g.:
"Beethoven: Variations On "Ein Mädchen Oder Weibchen", Op. 66 - Var. 1"
"Beethoven: Variations On "Ein Mädchen Oder Weibchen", Op. 66 - Var. 2"
Scrolling in a list of title, I can't distinguish the titles, because just the first words are shown followed by: "...".
That's horrible!

Or you could include a width to your body style:
body {
background-image: url(Logo/sky1.jpg);
background-position: center center;
background-attachment: fixed;
width: 75%;}
It might work or not depending on your other color scheme.

How to read the content of ms-word file use pure java???

how to read the content of ms-word file use pure java???

hi,
check this: http://jakarta.apache.org/poi/

How to read the statistics graph?

Similar Messages

Maybe you are looking for