Message: 4
Date: Fri, 14 Oct 2011 18:17:06 -0700
From: "John Miles" <[email protected]>
To: "'Discussion of precise time and frequency measurement'"
<[email protected]>
Subject: Re: [time-nuts] Prologix GPiB LAN & 7470 printing problem
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
Hi group,
just got a Prologix LAN interface and tried to get some
printouts from my Anritsu MS6804A but it didnt works.
Phase Noise & Spectrum Surveillance prgs works fine
but 7470.exe allways tells me "communication error 0x02"
when I request a plot.
Communication to the Anritsu works cause it beeps
like I would press the "copy" (print) key on the device but there
didnt came any data to the 7470 emulator.
The Anritsu offers the following devices for printing
in its setup:
HP2225
UA455A
MC8104A
ESC/P
I tried all but none of them works.
Any idea?
I'm not familiar with any of those, actually. In general if the 7470.htm
help file doesn't mention that you can request plots from a specific
instrument model, then host-requested plots will not work with that
instrument. You'll need to use "Acquire->Wait for device-initiated plot"
and hit the PLOT button on the instrument's front panel... and that, in
turn, will require you to configure the instrument for HPGL output to an
HP
7470A/7475A or similar plotter.
A quick Google suggests that the units you mention are either printers or
non-HPGL plotters. 7470.exe will either do nothing or possibly crash
outright if you try to send anything but HPGL traffic to it, so your best
bet may be to try the evaluation version from http://www.printcapture.com
and see if their Epson support works with the ESC/P output option. (It
should work with the Prologix USB adapter but I'm not sure about the LAN
adapter.)
-- john, KE5FX
Hi John,
thank you for your suggestions. Im in between fixing of the problem together
with Prologix support.
I have a question about your PhaseNoise tool handling:
As I tried a test using my Anritsu spec I got strange results.
The following happened:
I didnt connect any signal source to get the noise of the instrument only
and set the carrier to 425MHz. As signal strenght I put in -140dBm
and connected a 50Ohm dummy resistor to the instruments input.
Offset-range was set to 30-1000Hz.
As expected I got a horizontal line at -127dBm from 10-100Hz.
Unexpectedly level changed from 100-200Hz as a falling curve down to -132dBm
and went on horizontaly further at this level to 1kHz.
During the measurement I observed the instrument and saw that it switched
from
RBW 10Hz to 100Hz so that I guess thats the reason for the descending level
between 100 and 200Hz f-offset. So the observed effect seems to be a
property
of the Anritsu instrument.
Similar happened between 1-10kHz and so on.
My question: How can I adjust that offset to get a smooth measuring result?
Thank you for your answer
Regards
Peter, DG4EK
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