|
 |
Power measurement using network Analyser - RF Cafe Forums
|
| bansals_in
|
|
Post subject: Power measurement using network Analyser
Posted: Fri Jul 21, 2006 3:52 am
|
|
Joined: Fri Jul 21, 2006
3:11 am
Posts: 2 |
|
Hi,
I am new to Network Analyser and I have to
measure the output power of a device( HDSL Modem)
which is in between 13 to 14 dbm, I would like to
know whether it is possible to measure the output
power with the help of network analyser and if yes..
pls let me know how..
Thanks..
Ashish
|
|
| |
|
 |
|
RFTEJerry |
|
Post subject:
Posted: Fri Jul 21, 2006 8:12 am
|
|
| |
| Captain |
 |
Joined: Thu Apr 13, 2006
9:53 am
Posts: 17
Location: Florida
|
|
Hello Ashish and Welcome to RF Cafe,
A Network
Analyzer (NA) can measure the output power in the
range you have - 13-14 dBm. It would not be my first
choice. More information is needed. Are you trying
to measure CW, pulsed or other modulated power?
Is the power peak or average? What accuracy do you
need and is it absolute or relative power?
If simple CW I would use a power meter. It has
high accuracy, easy setup and cost less than a NA.
My next choice would be a spectrum analyzer for
CW and especially or pulsed/modulated power. My
last choice would be a NA due to cost, additional
equipment and setup time. However, if all you have
available is a NA then some of these issues are
moot.
The method for measuring RF power using
a NA is to perform an S21 (gain measurement). Some
modern VNA have built in routines to do power measurements
and the method should be explained in the users
manual. The procedure is to involved to explain
in this format. I would go to Agilent or Anritsu
and download their application notes on network
analyzers that detail how to do an S21 measurement.
In addition Agilent has several excellent application
notes on RF power measurement (AN-64, AN-64-1 and
AN-1449-1, -2, -3).
Good luck,
RFTEJerry
|
|
| |
|
|
|
|
bansals_in |
|
Post subject: Power measurement using network Analyser
Posted: Sat Jul 22, 2006 1:40 am
|
|
Joined: Fri Jul 21, 2006
3:11 am
Posts: 2 |
|
Hi..
Thanks for reply.
I am going for NA because
it is only instrument available with me.
I have
to measure output power of HDSL Modem for some testing.
It is 2B1Q modulated power as per ITU-T Rec. G.991.1
I have to measure peak power which is being
transmitted on DLL lines by modem.
Presently
I have Agilent E5100A NA with me and I have to measure
with it.
So is it possible.
Pl. reply..
|
|
Posted 11/12/2012
|
|
|
|
|
