Vswr Measurement Ppt

September 20, 2017 | Author: Antariksha Singh | Category: Calibration, Electromagnetism, Telecommunications, Radio, Wireless
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Short Description

VSWR...

Description



Put ON the site analyzer by press & hold ON/OFF button for few second…



Screen appear on the display to any one mode in which it was switch off…



Here mode is fault location , so screen appear on display…

Fault Location Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 0

Distance(M)

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0

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Esc Enter

450



Here we need to change the mode because we measure the VSWR not localize the fault...



Press the MODE button & screen change to…

Select Mode Measure match Fault location Measure power

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Esc Enter



Select MEASURE MATCH button by pressing selection button & screen change to…

Measure match Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 1710

Frequency(MHz)

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Esc Enter

1880



Here frequency scale is not for GSM900 band so we have to change frequency band…



Now press CONFIGURATION button & screen change to…

Frequency Limit

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Esc Enter



Using SELECTION button , select the frequency…

VSWR

Start frequency

1710

MHz

Stop frequency

1880

MHz

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Esc Enter



Select start frequency and stop frequency by using LEFT/RIGHT AROOW button and enter desired frequency by using NUMERIC KEYPAD & press ENTER…



Now press Esc. And screen change to…

Measure match Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 890

Frequency(MHz)

960

Calibration OFF

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Esc Enter



Now here we need to calibration ON…



So we need for that calibration kit…



To do calibration , press CALIBRATION button…

Calibration Short Open Load

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Esc Enter





Now connect short connector of calibration kit with RF antenna port of the site analyzer… So by using SELECTION button select SHORT screen change to…

&

Calibration Short Done Open Load

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Esc Enter



Now remove short connector & connect open connector with RF antenna port of the site analyzer…



So by using SELECTION button select OPEN & screen change to…

Calibration Short Done Open Done Load

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Esc Enter



Now remove open connector & connect load connector with RF antenna port of the site analyzer…



So by using SELECTION button select LOAD & screen change to…

Measure match Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 890

Frequency(MHz) Calibration ON

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*

0

#

Esc Enter

960



Now remove load connector & connect RF antenna port and Jumper using adaptor…



Then press AUTO SCALE & screen change to…

Measure match Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 890

Frequency(MHz) Calibration ON

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9

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0

#

Esc Enter

960



From this graph we don’t take exact value of VSWR…



For that we need marker on the graph…



So activate marker by press MARKER button & screen change to…

Marker M1 Activate

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Esc Enter



Now select activate by using SELECTION button & screen change to…

Marker M1 Deactivate

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Esc Enter



Now press Esc & screen change to…

Measure match Save/Recall

1.4

Auto Scale

VSWR

Hold

M1

1.0 890 M1: 900

Frequency(MHz) Calibration ON

1.19

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Esc Enter

960



We need marker on the pick…



So press the TOP ARROW button and marker shift to the pick & screen change to…

Measure match Save/Recall

M1

1.4

Auto Scale

VSWR

Hold

1.0 890 M1: 900

Frequency(MHz) Calibration ON

1.19

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#

Esc Enter

960



Here VSWR value is over the acceptable range means fault in transmission line…



So we have to localize the fault…



For that we need change the mode…



So press MODE button and select the fault location by using SELECTION button & screen change to…

Fault Location Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 0 M1: 900

Distance(m) Calibration ON

1.19

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Esc Enter

450



In this screen accuracy of reading is not good…



So we need to set distance scale…



So press the CONFIGURATION button & screen change to…

Distance Limit

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Esc Enter



Now select distance by using selection button & screen change to…

Distance

meter Start Distance

0

Stop Distance

450

Max Distance

450

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#

Esc Enter



Now select stop distance by using LEFT/RIGHT ARROW button…



Then enter desired distance by using NUMERIC KEYPAD and press enter…



Now press Esc & screen change to…

Fault Location Save/Recall

1.4

Auto Scale

VSWR

Hold

1.0 0

Distance(m) Calibration ON

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*

0

#

Esc Enter

25



Here we also need marker for exact location…



So we have to activate the marker…



So press MARKER and select activate using SELECION button & screen change to…

Fault Location Save/Recall

1.4

Auto Scale Hold VSWR

M1

1.0 0 M1: 1

Distance(m) Calibration ON

1.18

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Esc Enter

25



Now press TOP ARROW button and marker on the pick & screen change to…

Fault Location Save/Recall

1.4

M1

Auto Scale

VSWR

Hold

1.0 0 M1: 12

Distance(m) Calibration ON

1.37

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Esc Enter

25



Now we get fault at exact location…



So check that location and rectify fault…



Now for save the reading select Save/Recall by using SELECTION button & screen change to…

Save Recall Edit

JAIPUR -1M 22/12/2011 2.00PM

Delete

JAIPUR -1M 22/12/2011 2.05PM JAIPUR -1M 22/12/2011 2.10PM

JAIPUR -1M 22/12/2011 2.15PM

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Esc Enter



To save the new reading select save by using SELECTION button & screen change to...

SURAT B – 1M K

A

F

K

P

U

Z

*

L

B

G

L

Q

V

Space



M

C

H

M

R

W

[

:

D

I

N

S

X

]

-

E

J

O

T

Y

=

+

N O

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Esc Enter



Now enter name and then press Esc…



So reading saved & screen change to…

Save Recall

SURAT B - 1M 25/12/2011 9.15AM

Edit

JAIPUR -1M 22/12/2011 2.00PM

Delete

JAIPUR -1M 22/12/2011 2.05PM JAIPUR -1M 22/12/2011 2.10PM

JAIPUR -1M 22/12/2011 2.15PM

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Esc Enter



Now arrange all the connection with S.A and sensor…



50w element towards O/P direction and 5 w element towards I/P direction…



Connect S.A with sensor using D-9 serial straight cable…



Now put ON the S.A…



We have to need change the mode…



So change the mode to MEASURE POWER & screen change to…

Measure power M watt

Warning Do not apply external power to RF antenna test port

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Esc Enter



After few time screen change to…

Measure power DBM 50

0 FWD: 40 watt REF: 0.1 watt

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*

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Esc Enter

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