Hello Rod,
The 8756A is circa 1983. This was close to the end of the "R2D2" instrument
programming era, and the 8756A contains two-letter "R2D2"
commands, much like the 3455A voltmeter.
So, discard any attempts to use "SCPI", because it will only clog the tiny
input
buffer in the 8756A. You'll need direct I/O, and do set up the read and
write
terminators. You may need delays between write and read operations. This
instrument likes to see c/r and l/f on commands that it receives.
Commands:
SCd where d is between 0 and 400. Places cursor at horizontal position d.
It's up to you to to figure out what that frequency might be.
That should
be available from the sweeper connected to the 8756A, along with
some
number-crunching.
CX Cursor to maximum
CN Cursor to minimum
CU0 Cursor OFF
CU1 Cursor ON
CD0 Cursor Delta OFF
CD1 Cursor Delta ON
MR Cursor (or marker) to Reference Line
OC output cursor or cursor delta amplitude and horizontal position.
Format
set by FD command.
FD0 [+DD.DDD][,][DDD]lf <--- The "lf" is a line-feed. You must receive
this character.
FD1 [BB][DDD][EOI] <--- "EOI" is the IEEE-488 End Or Identify
(no line-feed here)
B means an 8-bit
byte, D means ASCII Digit.
OV output current measurement value; usually for CW measurements. Format
(FDm)
must be set and NonSwept mode SW0 must be set.
FD0 [+DD.DDD]lf
FD1 [BB][EOI]
I have other commands for the 8756A, if you are interested. It's been a
very long time since
I programmed that unit, and I used the 9845 and 9826 desktop for that
task...
George Tyrrell
TestDynamics LLC
tdllc01@earthlink.net
----- Original Message -----
From: "Rod" <rod@premierdevices.com>
To: <vrf@lvld.agilent.com>
Sent: Wednesday, June 20, 2001 4:13 PM
Subject: Re: vrf Stop button
> Hello,
>
> We are using an old HP8756A Scalar Analyzer to take some data. I am trying
> to set the cursor on a specific frequency and read data from it. Does
anyone
> know what command line to use? I've tried several: ":MEAS:CRSR:AMPL?"
> ,":MEAS:CURS:AMPL?" etc.
>
> Is anyone out there old enough to know how to help me?
>
> Thanks a lot,
>
> Rod
>
>
>
> ----- Original Message -----
> From: "Stan Bischof (Richard S)" <rsb@soco.agilent.com>
> To: <lee.hudson@lumileds.com>
> Cc: <vrf@lvld.agilent.com>
> Sent: Wednesday, June 20, 2001 1:38 PM
> Subject: Re: vrf Stop button
>
>
> > "HUDSON,LEE (Non-A-LumiLEDs,ex1)" <lee.hudson@lumileds.com> wrote:
> > > Hi All,
> > >
> > > In a lot of my VEE programs I have an "Abort Test" or "Stop" button
that
> > > stops the program and resets instruments. However, if someone decides
> to
> > > kill the program using the "Stop" button on the tool bar of VEE none
of
> the
> > > instruments get reset and problems occur. Is there a way to have the
> > > program reset instruments when this button is pressed?
> > >
> > > Related to this problem is there a way to get rid of the tool bar of
VEE
> in
> > > the panel mode and force the operator to use a "Start" and "Stop"
button
> > > from the panel view? This would be an acceptable work-around to the
> above
> > > mentioned problem.
> >
> > for the latter, one option is to use vee runtime and
> >
> > veerun -disallowclose myfile.vxe
> >
> > then user can't even use the Windows controls ("X") to close the app
> > but must go through your interface. And there is no "Stop" button to
> press.
> >
> > Stan
> >
> >
>
> --------------------------------------------------------------------------
> > Stan Bischof Agilent Technologies 707-577-3994
stan_bischof@agilent.com
>
> --------------------------------------------------------------------------
> > ---------------------------------------------------------------------
> > This is the "vrf" maillist, managed by Majordomo. To send messages to
> > this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
> > unsubscriptions are done through the address
> "vrf-request@lvld.agilent.com".
> > If you need details, just send a message containing the text "help"
> > to "vrf-request@lvld.agilent.com".
> > ---------------------------------------------------------------------
> >
>
> ---------------------------------------------------------------------
> This is the "vrf" maillist, managed by Majordomo. To send messages to
> this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
> unsubscriptions are done through the address
"vrf-request@lvld.agilent.com".
> If you need details, just send a message containing the text "help"
> to "vrf-request@lvld.agilent.com".
> ---------------------------------------------------------------------
---------------------------------------------------------------------
This is the "vrf" maillist, managed by Majordomo. To send messages to
this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
unsubscriptions are done through the address "vrf-request@lvld.agilent.com".
If you need details, just send a message containing the text "help"
to "vrf-request@lvld.agilent.com".
---------------------------------------------------------------------
The 8756A is circa 1983. This was close to the end of the "R2D2" instrument
programming era, and the 8756A contains two-letter "R2D2"
commands, much like the 3455A voltmeter.
So, discard any attempts to use "SCPI", because it will only clog the tiny
input
buffer in the 8756A. You'll need direct I/O, and do set up the read and
write
terminators. You may need delays between write and read operations. This
instrument likes to see c/r and l/f on commands that it receives.
Commands:
SCd where d is between 0 and 400. Places cursor at horizontal position d.
It's up to you to to figure out what that frequency might be.
That should
be available from the sweeper connected to the 8756A, along with
some
number-crunching.
CX Cursor to maximum
CN Cursor to minimum
CU0 Cursor OFF
CU1 Cursor ON
CD0 Cursor Delta OFF
CD1 Cursor Delta ON
MR Cursor (or marker) to Reference Line
OC output cursor or cursor delta amplitude and horizontal position.
Format
set by FD command.
FD0 [+DD.DDD][,][DDD]lf <--- The "lf" is a line-feed. You must receive
this character.
FD1 [BB][DDD][EOI] <--- "EOI" is the IEEE-488 End Or Identify
(no line-feed here)
B means an 8-bit
byte, D means ASCII Digit.
OV output current measurement value; usually for CW measurements. Format
(FDm)
must be set and NonSwept mode SW0 must be set.
FD0 [+DD.DDD]lf
FD1 [BB][EOI]
I have other commands for the 8756A, if you are interested. It's been a
very long time since
I programmed that unit, and I used the 9845 and 9826 desktop for that
task...
George Tyrrell
TestDynamics LLC
tdllc01@earthlink.net
----- Original Message -----
From: "Rod" <rod@premierdevices.com>
To: <vrf@lvld.agilent.com>
Sent: Wednesday, June 20, 2001 4:13 PM
Subject: Re: vrf Stop button
> Hello,
>
> We are using an old HP8756A Scalar Analyzer to take some data. I am trying
> to set the cursor on a specific frequency and read data from it. Does
anyone
> know what command line to use? I've tried several: ":MEAS:CRSR:AMPL?"
> ,":MEAS:CURS:AMPL?" etc.
>
> Is anyone out there old enough to know how to help me?
>
> Thanks a lot,
>
> Rod
>
>
>
> ----- Original Message -----
> From: "Stan Bischof (Richard S)" <rsb@soco.agilent.com>
> To: <lee.hudson@lumileds.com>
> Cc: <vrf@lvld.agilent.com>
> Sent: Wednesday, June 20, 2001 1:38 PM
> Subject: Re: vrf Stop button
>
>
> > "HUDSON,LEE (Non-A-LumiLEDs,ex1)" <lee.hudson@lumileds.com> wrote:
> > > Hi All,
> > >
> > > In a lot of my VEE programs I have an "Abort Test" or "Stop" button
that
> > > stops the program and resets instruments. However, if someone decides
> to
> > > kill the program using the "Stop" button on the tool bar of VEE none
of
> the
> > > instruments get reset and problems occur. Is there a way to have the
> > > program reset instruments when this button is pressed?
> > >
> > > Related to this problem is there a way to get rid of the tool bar of
VEE
> in
> > > the panel mode and force the operator to use a "Start" and "Stop"
button
> > > from the panel view? This would be an acceptable work-around to the
> above
> > > mentioned problem.
> >
> > for the latter, one option is to use vee runtime and
> >
> > veerun -disallowclose myfile.vxe
> >
> > then user can't even use the Windows controls ("X") to close the app
> > but must go through your interface. And there is no "Stop" button to
> press.
> >
> > Stan
> >
> >
>
> --------------------------------------------------------------------------
> > Stan Bischof Agilent Technologies 707-577-3994
stan_bischof@agilent.com
>
> --------------------------------------------------------------------------
> > ---------------------------------------------------------------------
> > This is the "vrf" maillist, managed by Majordomo. To send messages to
> > this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
> > unsubscriptions are done through the address
> "vrf-request@lvld.agilent.com".
> > If you need details, just send a message containing the text "help"
> > to "vrf-request@lvld.agilent.com".
> > ---------------------------------------------------------------------
> >
>
> ---------------------------------------------------------------------
> This is the "vrf" maillist, managed by Majordomo. To send messages to
> this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
> unsubscriptions are done through the address
"vrf-request@lvld.agilent.com".
> If you need details, just send a message containing the text "help"
> to "vrf-request@lvld.agilent.com".
> ---------------------------------------------------------------------
---------------------------------------------------------------------
This is the "vrf" maillist, managed by Majordomo. To send messages to
this maillist, just email to "vrf@lvld.agilent.com". Subscriptions and
unsubscriptions are done through the address "vrf-request@lvld.agilent.com".
If you need details, just send a message containing the text "help"
to "vrf-request@lvld.agilent.com".
---------------------------------------------------------------------