TC
Trevor Clarke
Fri, Jul 2, 2021 1:35 PM
Just got an R2670 service monitor (Thanks Tom) and I'm interested in seeing
how far the calibration has slipped so I was thinking of bringing it to the
picnic. I'm not sure what tests would be best to run but I suspect checking
the frequency counter against a gps or rubidium clock would cover a lot of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
Just got an R2670 service monitor (Thanks Tom) and I'm interested in seeing
how far the calibration has slipped so I was thinking of bringing it to the
picnic. I'm not sure what tests would be best to run but I suspect checking
the frequency counter against a gps or rubidium clock would cover a lot of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
EM
Ethan Miller K8GU
Fri, Jul 2, 2021 2:26 PM
Trevor,
As the other recipient of Tom's generosity (the IFR AM/FM-1200S---thank
you!), the big thing I'd like to look at on mine is the signal generator
power calibration at a couple of key frequencies (14.175 MHz for my Kenwood
TS-930S projects and all VHF bands). As with anything more than 24 hours
away, my attendance at Daun's is TBD; but, that's my top checkout item.
Others you mention would be good, too, especially the frequency.
73,
--Ethan, K8GU.
On Fri, Jul 2, 2021 at 9:39 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in seeing
how far the calibration has slipped so I was thinking of bringing it to the
picnic. I'm not sure what tests would be best to run but I suspect checking
the frequency counter against a gps or rubidium clock would cover a lot of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
Trevor,
As the other recipient of Tom's generosity (the IFR AM/FM-1200S---thank
you!), the big thing I'd like to look at on mine is the signal generator
power calibration at a couple of key frequencies (14.175 MHz for my Kenwood
TS-930S projects and all VHF bands). As with anything more than 24 hours
away, my attendance at Daun's is TBD; but, that's my top checkout item.
Others you mention would be good, too, especially the frequency.
73,
--Ethan, K8GU.
On Fri, Jul 2, 2021 at 9:39 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:
> Just got an R2670 service monitor (Thanks Tom) and I'm interested in seeing
> how far the calibration has slipped so I was thinking of bringing it to the
> picnic. I'm not sure what tests would be best to run but I suspect checking
> the frequency counter against a gps or rubidium clock would cover a lot of
> the important circuitry. Probably check the display linearity and noise
> characteristics too. The signal generator should probably be checked as
> well.
>
> I know fluke has some useful cal app notes (like this one:
> https://download.flukecal.com/pub/literature/2519570D-w.pdf )
> which covers a large array of tests but I'm not sure which components are
> most likely to go out of spec and which tests are most useful. The
> reference oscillator is likely number one on the list. Anything else worth
> checking?
>
> --
> Trevor R.H. Clarke
> Computer Science House
> Rochester Institute of Technology
> retrev@csh.rit.edu
> http://www.csh.rit.edu/~retrev/
> _______________________________________________
> mvus-list mailing list -- mvus-list@lists.febo.com
> To unsubscribe send an email to mvus-list-leave@lists.febo.com
>
--
http://www.k8gu.com/
Repair. Re-use. Re-purpose. Recycle.
JA
John Ackermann
Fri, Jul 2, 2021 3:10 PM
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list mvus-list@lists.febo.com wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in
seeing
how far the calibration has slipped so I was thinking of bringing it to
the
picnic. I'm not sure what tests would be best to run but I suspect
checking
the frequency counter against a gps or rubidium clock would cover a lot
of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components
are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else
worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote:
>Just got an R2670 service monitor (Thanks Tom) and I'm interested in
>seeing
>how far the calibration has slipped so I was thinking of bringing it to
>the
>picnic. I'm not sure what tests would be best to run but I suspect
>checking
>the frequency counter against a gps or rubidium clock would cover a lot
>of
>the important circuitry. Probably check the display linearity and noise
>characteristics too. The signal generator should probably be checked as
>well.
>
>I know fluke has some useful cal app notes (like this one:
>https://download.flukecal.com/pub/literature/2519570D-w.pdf )
>which covers a large array of tests but I'm not sure which components
>are
>most likely to go out of spec and which tests are most useful. The
>reference oscillator is likely number one on the list. Anything else
>worth
>checking?
>
>--
>Trevor R.H. Clarke
>Computer Science House
>Rochester Institute of Technology
>retrev@csh.rit.edu
>http://www.csh.rit.edu/~retrev/
>_______________________________________________
>mvus-list mailing list -- mvus-list@lists.febo.com
>To unsubscribe send an email to mvus-list-leave@lists.febo.com
TH
Tom Holmes
Fri, Jul 2, 2021 7:04 PM
Trevor & Ethan...
If you are in a hurry, John's offer is a good option. But, it would be great to have you out to Daun's for the picnic.
As for what to check, certainly frequency accuracy against a GPSDO or an Rb driven counter is a good test. Also, power output vs frequency can be done with a power meter or Spec An (the PM is best but the SA is quite adequate for ham stuff).
If Daun has a suitable 10 MHz reference, or John brings one of his many, I can bring a counter and power n=meter. Daun has a suitable SA, too.
If you want to get really fussy, bring your test cables and we'll sweep them for loss so you can correct for those in your measurements.
The SM's also have receivers that should be checked for sensitivity, and deviation accuracy. I have that covered with a Sig Gen if Daun doesn't.
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann via mvus-list mvus-list@lists.febo.com
Sent: Friday, July 02, 2021 11:10 AM
To: Trevor Clarke via mvus-list mvus-list@lists.febo.com
Cc: Trevor Clarke retrev@csh.rit.edu; John Ackermann jra@febo.com
Subject: [mvus-list] Re: test gear for the picnic
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list mvus-list@lists.febo.com wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in
seeing
how far the calibration has slipped so I was thinking of bringing it to
the
picnic. I'm not sure what tests would be best to run but I suspect
checking
the frequency counter against a gps or rubidium clock would cover a lot
of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components
are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else
worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
Trevor & Ethan...
If you are in a hurry, John's offer is a good option. But, it would be great to have you out to Daun's for the picnic.
As for what to check, certainly frequency accuracy against a GPSDO or an Rb driven counter is a good test. Also, power output vs frequency can be done with a power meter or Spec An (the PM is best but the SA is quite adequate for ham stuff).
If Daun has a suitable 10 MHz reference, or John brings one of his many, I can bring a counter and power n=meter. Daun has a suitable SA, too.
If you want to get really fussy, bring your test cables and we'll sweep them for loss so you can correct for those in your measurements.
The SM's also have receivers that should be checked for sensitivity, and deviation accuracy. I have that covered with a Sig Gen if Daun doesn't.
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann via mvus-list <mvus-list@lists.febo.com>
Sent: Friday, July 02, 2021 11:10 AM
To: Trevor Clarke via mvus-list <mvus-list@lists.febo.com>
Cc: Trevor Clarke <retrev@csh.rit.edu>; John Ackermann <jra@febo.com>
Subject: [mvus-list] Re: test gear for the picnic
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote:
>Just got an R2670 service monitor (Thanks Tom) and I'm interested in
>seeing
>how far the calibration has slipped so I was thinking of bringing it to
>the
>picnic. I'm not sure what tests would be best to run but I suspect
>checking
>the frequency counter against a gps or rubidium clock would cover a lot
>of
>the important circuitry. Probably check the display linearity and noise
>characteristics too. The signal generator should probably be checked as
>well.
>
>I know fluke has some useful cal app notes (like this one:
>https://download.flukecal.com/pub/literature/2519570D-w.pdf )
>which covers a large array of tests but I'm not sure which components
>are
>most likely to go out of spec and which tests are most useful. The
>reference oscillator is likely number one on the list. Anything else
>worth
>checking?
>
>--
>Trevor R.H. Clarke
>Computer Science House
>Rochester Institute of Technology
>retrev@csh.rit.edu
>http://www.csh.rit.edu/~retrev/
>_______________________________________________
>mvus-list mailing list -- mvus-list@lists.febo.com
>To unsubscribe send an email to mvus-list-leave@lists.febo.com
_______________________________________________
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
JA
John Ackermann N8UR
Fri, Jul 2, 2021 7:26 PM
You know, if we want to have fun, I could bring out the one Cesium
standard I have that's reasonably portable.
On 7/2/21 3:04 PM, Tom Holmes wrote:
Trevor & Ethan...
If you are in a hurry, John's offer is a good option. But, it would be great to have you out to Daun's for the picnic.
As for what to check, certainly frequency accuracy against a GPSDO or an Rb driven counter is a good test. Also, power output vs frequency can be done with a power meter or Spec An (the PM is best but the SA is quite adequate for ham stuff).
If Daun has a suitable 10 MHz reference, or John brings one of his many, I can bring a counter and power n=meter. Daun has a suitable SA, too.
If you want to get really fussy, bring your test cables and we'll sweep them for loss so you can correct for those in your measurements.
The SM's also have receivers that should be checked for sensitivity, and deviation accuracy. I have that covered with a Sig Gen if Daun doesn't.
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann via mvus-list mvus-list@lists.febo.com
Sent: Friday, July 02, 2021 11:10 AM
To: Trevor Clarke via mvus-list mvus-list@lists.febo.com
Cc: Trevor Clarke retrev@csh.rit.edu; John Ackermann jra@febo.com
Subject: [mvus-list] Re: test gear for the picnic
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list mvus-list@lists.febo.com wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in
seeing
how far the calibration has slipped so I was thinking of bringing it to
the
picnic. I'm not sure what tests would be best to run but I suspect
checking
the frequency counter against a gps or rubidium clock would cover a lot
of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components
are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else
worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
You know, if we want to have fun, I could bring out the one Cesium
standard I have that's reasonably portable.
On 7/2/21 3:04 PM, Tom Holmes wrote:
> Trevor & Ethan...
>
> If you are in a hurry, John's offer is a good option. But, it would be great to have you out to Daun's for the picnic.
>
> As for what to check, certainly frequency accuracy against a GPSDO or an Rb driven counter is a good test. Also, power output vs frequency can be done with a power meter or Spec An (the PM is best but the SA is quite adequate for ham stuff).
>
> If Daun has a suitable 10 MHz reference, or John brings one of his many, I can bring a counter and power n=meter. Daun has a suitable SA, too.
>
> If you want to get really fussy, bring your test cables and we'll sweep them for loss so you can correct for those in your measurements.
>
> The SM's also have receivers that should be checked for sensitivity, and deviation accuracy. I have that covered with a Sig Gen if Daun doesn't.
>
> Tom Holmes, N8ZM
>
> -----Original Message-----
> From: John Ackermann via mvus-list <mvus-list@lists.febo.com>
> Sent: Friday, July 02, 2021 11:10 AM
> To: Trevor Clarke via mvus-list <mvus-list@lists.febo.com>
> Cc: Trevor Clarke <retrev@csh.rit.edu>; John Ackermann <jra@febo.com>
> Subject: [mvus-list] Re: test gear for the picnic
>
> Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
>
> John
>
> On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote:
>> Just got an R2670 service monitor (Thanks Tom) and I'm interested in
>> seeing
>> how far the calibration has slipped so I was thinking of bringing it to
>> the
>> picnic. I'm not sure what tests would be best to run but I suspect
>> checking
>> the frequency counter against a gps or rubidium clock would cover a lot
>> of
>> the important circuitry. Probably check the display linearity and noise
>> characteristics too. The signal generator should probably be checked as
>> well.
>>
>> I know fluke has some useful cal app notes (like this one:
>> https://download.flukecal.com/pub/literature/2519570D-w.pdf )
>> which covers a large array of tests but I'm not sure which components
>> are
>> most likely to go out of spec and which tests are most useful. The
>> reference oscillator is likely number one on the list. Anything else
>> worth
>> checking?
>>
>> --
>> Trevor R.H. Clarke
>> Computer Science House
>> Rochester Institute of Technology
>> retrev@csh.rit.edu
>> http://www.csh.rit.edu/~retrev/
>> _______________________________________________
>> mvus-list mailing list -- mvus-list@lists.febo.com
>> To unsubscribe send an email to mvus-list-leave@lists.febo.com
> _______________________________________________
> mvus-list mailing list -- mvus-list@lists.febo.com
> To unsubscribe send an email to mvus-list-leave@lists.febo.com
>
>
DY
Daun Yeagley
Fri, Jul 2, 2021 7:47 PM
That could be fun!
Daun
On 7/2/2021 3:26 PM, John Ackermann N8UR via mvus-list wrote:
You know, if we want to have fun, I could bring out the one Cesium
standard I have that's reasonably portable.
On 7/2/21 3:04 PM, Tom Holmes wrote:
Trevor & Ethan...
If you are in a hurry, John's offer is a good option. But, it would
be great to have you out to Daun's for the picnic.
As for what to check, certainly frequency accuracy against a GPSDO or
an Rb driven counter is a good test. Also, power output vs frequency
can be done with a power meter or Spec An (the PM is best but the SA
is quite adequate for ham stuff).
If Daun has a suitable 10 MHz reference, or John brings one of his
many, I can bring a counter and power n=meter. Daun has a suitable
SA, too.
If you want to get really fussy, bring your test cables and we'll
sweep them for loss so you can correct for those in your measurements.
The SM's also have receivers that should be checked for sensitivity,
and deviation accuracy. I have that covered with a Sig Gen if Daun
doesn't.
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann via mvus-list mvus-list@lists.febo.com
Sent: Friday, July 02, 2021 11:10 AM
To: Trevor Clarke via mvus-list mvus-list@lists.febo.com
Cc: Trevor Clarke retrev@csh.rit.edu; John Ackermann jra@febo.com
Subject: [mvus-list] Re: test gear for the picnic
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If
not, I can bring something along, or you're always welcome to stop by
my house where I can provide a number of accurate sources (and
calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list
mvus-list@lists.febo.com wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in
seeing
how far the calibration has slipped so I was thinking of bringing it to
the
picnic. I'm not sure what tests would be best to run but I suspect
checking
the frequency counter against a gps or rubidium clock would cover a lot
of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components
are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else
worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
--
Daun E. Yeagley II, N8ASB
That could be fun!
Daun
On 7/2/2021 3:26 PM, John Ackermann N8UR via mvus-list wrote:
> You know, if we want to have fun, I could bring out the one Cesium
> standard I have that's reasonably portable.
>
> On 7/2/21 3:04 PM, Tom Holmes wrote:
>> Trevor & Ethan...
>>
>> If you are in a hurry, John's offer is a good option. But, it would
>> be great to have you out to Daun's for the picnic.
>>
>> As for what to check, certainly frequency accuracy against a GPSDO or
>> an Rb driven counter is a good test. Also, power output vs frequency
>> can be done with a power meter or Spec An (the PM is best but the SA
>> is quite adequate for ham stuff).
>>
>> If Daun has a suitable 10 MHz reference, or John brings one of his
>> many, I can bring a counter and power n=meter. Daun has a suitable
>> SA, too.
>>
>> If you want to get really fussy, bring your test cables and we'll
>> sweep them for loss so you can correct for those in your measurements.
>>
>> The SM's also have receivers that should be checked for sensitivity,
>> and deviation accuracy. I have that covered with a Sig Gen if Daun
>> doesn't.
>>
>> Tom Holmes, N8ZM
>>
>> -----Original Message-----
>> From: John Ackermann via mvus-list <mvus-list@lists.febo.com>
>> Sent: Friday, July 02, 2021 11:10 AM
>> To: Trevor Clarke via mvus-list <mvus-list@lists.febo.com>
>> Cc: Trevor Clarke <retrev@csh.rit.edu>; John Ackermann <jra@febo.com>
>> Subject: [mvus-list] Re: test gear for the picnic
>>
>> Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If
>> not, I can bring something along, or you're always welcome to stop by
>> my house where I can provide a number of accurate sources (and
>> calibrated sig gen to check the RX side).
>>
>> John
>>
>> On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list
>> <mvus-list@lists.febo.com> wrote:
>>> Just got an R2670 service monitor (Thanks Tom) and I'm interested in
>>> seeing
>>> how far the calibration has slipped so I was thinking of bringing it to
>>> the
>>> picnic. I'm not sure what tests would be best to run but I suspect
>>> checking
>>> the frequency counter against a gps or rubidium clock would cover a lot
>>> of
>>> the important circuitry. Probably check the display linearity and noise
>>> characteristics too. The signal generator should probably be checked as
>>> well.
>>>
>>> I know fluke has some useful cal app notes (like this one:
>>> https://download.flukecal.com/pub/literature/2519570D-w.pdf )
>>> which covers a large array of tests but I'm not sure which components
>>> are
>>> most likely to go out of spec and which tests are most useful. The
>>> reference oscillator is likely number one on the list. Anything else
>>> worth
>>> checking?
>>>
>>> --
>>> Trevor R.H. Clarke
>>> Computer Science House
>>> Rochester Institute of Technology
>>> retrev@csh.rit.edu
>>> http://www.csh.rit.edu/~retrev/
>>> _______________________________________________
>>> mvus-list mailing list -- mvus-list@lists.febo.com
>>> To unsubscribe send an email to mvus-list-leave@lists.febo.com
>> _______________________________________________
>> mvus-list mailing list -- mvus-list@lists.febo.com
>> To unsubscribe send an email to mvus-list-leave@lists.febo.com
>>
>>
> _______________________________________________
> mvus-list mailing list -- mvus-list@lists.febo.com
> To unsubscribe send an email to mvus-list-leave@lists.febo.com
--
Daun E. Yeagley II, N8ASB
TH
Tom Holmes
Fri, Jul 2, 2021 8:20 PM
I like that!
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann N8UR jra@febo.com
Sent: Friday, July 02, 2021 3:26 PM
To: Tom Holmes tholmes@woh.rr.com; 'Midwest VHF/UHF Society Mailing List' mvus-list@lists.febo.com
Cc: 'Trevor Clarke' retrev@csh.rit.edu
Subject: Re: [mvus-list] Re: test gear for the picnic
You know, if we want to have fun, I could bring out the one Cesium
standard I have that's reasonably portable.
On 7/2/21 3:04 PM, Tom Holmes wrote:
Trevor & Ethan...
If you are in a hurry, John's offer is a good option. But, it would be great to have you out to Daun's for the picnic.
As for what to check, certainly frequency accuracy against a GPSDO or an Rb driven counter is a good test. Also, power output vs frequency can be done with a power meter or Spec An (the PM is best but the SA is quite adequate for ham stuff).
If Daun has a suitable 10 MHz reference, or John brings one of his many, I can bring a counter and power n=meter. Daun has a suitable SA, too.
If you want to get really fussy, bring your test cables and we'll sweep them for loss so you can correct for those in your measurements.
The SM's also have receivers that should be checked for sensitivity, and deviation accuracy. I have that covered with a Sig Gen if Daun doesn't.
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann via mvus-list mvus-list@lists.febo.com
Sent: Friday, July 02, 2021 11:10 AM
To: Trevor Clarke via mvus-list mvus-list@lists.febo.com
Cc: Trevor Clarke retrev@csh.rit.edu; John Ackermann jra@febo.com
Subject: [mvus-list] Re: test gear for the picnic
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list mvus-list@lists.febo.com wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in
seeing
how far the calibration has slipped so I was thinking of bringing it to
the
picnic. I'm not sure what tests would be best to run but I suspect
checking
the frequency counter against a gps or rubidium clock would cover a lot
of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components
are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else
worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
I like that!
Tom Holmes, N8ZM
-----Original Message-----
From: John Ackermann N8UR <jra@febo.com>
Sent: Friday, July 02, 2021 3:26 PM
To: Tom Holmes <tholmes@woh.rr.com>; 'Midwest VHF/UHF Society Mailing List' <mvus-list@lists.febo.com>
Cc: 'Trevor Clarke' <retrev@csh.rit.edu>
Subject: Re: [mvus-list] Re: test gear for the picnic
You know, if we want to have fun, I could bring out the one Cesium
standard I have that's reasonably portable.
On 7/2/21 3:04 PM, Tom Holmes wrote:
> Trevor & Ethan...
>
> If you are in a hurry, John's offer is a good option. But, it would be great to have you out to Daun's for the picnic.
>
> As for what to check, certainly frequency accuracy against a GPSDO or an Rb driven counter is a good test. Also, power output vs frequency can be done with a power meter or Spec An (the PM is best but the SA is quite adequate for ham stuff).
>
> If Daun has a suitable 10 MHz reference, or John brings one of his many, I can bring a counter and power n=meter. Daun has a suitable SA, too.
>
> If you want to get really fussy, bring your test cables and we'll sweep them for loss so you can correct for those in your measurements.
>
> The SM's also have receivers that should be checked for sensitivity, and deviation accuracy. I have that covered with a Sig Gen if Daun doesn't.
>
> Tom Holmes, N8ZM
>
> -----Original Message-----
> From: John Ackermann via mvus-list <mvus-list@lists.febo.com>
> Sent: Friday, July 02, 2021 11:10 AM
> To: Trevor Clarke via mvus-list <mvus-list@lists.febo.com>
> Cc: Trevor Clarke <retrev@csh.rit.edu>; John Ackermann <jra@febo.com>
> Subject: [mvus-list] Re: test gear for the picnic
>
> Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I can bring something along, or you're always welcome to stop by my house where I can provide a number of accurate sources (and calibrated sig gen to check the RX side).
>
> John
>
> On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote:
>> Just got an R2670 service monitor (Thanks Tom) and I'm interested in
>> seeing
>> how far the calibration has slipped so I was thinking of bringing it to
>> the
>> picnic. I'm not sure what tests would be best to run but I suspect
>> checking
>> the frequency counter against a gps or rubidium clock would cover a lot
>> of
>> the important circuitry. Probably check the display linearity and noise
>> characteristics too. The signal generator should probably be checked as
>> well.
>>
>> I know fluke has some useful cal app notes (like this one:
>> https://download.flukecal.com/pub/literature/2519570D-w.pdf )
>> which covers a large array of tests but I'm not sure which components
>> are
>> most likely to go out of spec and which tests are most useful. The
>> reference oscillator is likely number one on the list. Anything else
>> worth
>> checking?
>>
>> --
>> Trevor R.H. Clarke
>> Computer Science House
>> Rochester Institute of Technology
>> retrev@csh.rit.edu
>> http://www.csh.rit.edu/~retrev/
>> _______________________________________________
>> mvus-list mailing list -- mvus-list@lists.febo.com
>> To unsubscribe send an email to mvus-list-leave@lists.febo.com
> _______________________________________________
> mvus-list mailing list -- mvus-list@lists.febo.com
> To unsubscribe send an email to mvus-list-leave@lists.febo.com
>
>
DW
Dana Whitlow
Sat, Jul 3, 2021 1:11 AM
John,
Is there any chance you'll have your H-maser in time for the picnic?
And if so, how well would it tolerate being taken on road trips?
I know that the active H-masers don't tolerate travel at all well, and
that it typically a few days of recuperation for them to make any
pretense of working well, and weeks to really settle down. And
that's assuming that they were kept running during transit.
Dana
On Fri, Jul 2, 2021 at 10:10 AM John Ackermann via mvus-list <
mvus-list@lists.febo.com> wrote:
Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I
can bring something along, or you're always welcome to stop by my house
where I can provide a number of accurate sources (and calibrated sig gen to
check the RX side).
John
On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:
Just got an R2670 service monitor (Thanks Tom) and I'm interested in
seeing
how far the calibration has slipped so I was thinking of bringing it to
the
picnic. I'm not sure what tests would be best to run but I suspect
checking
the frequency counter against a gps or rubidium clock would cover a lot
of
the important circuitry. Probably check the display linearity and noise
characteristics too. The signal generator should probably be checked as
well.
I know fluke has some useful cal app notes (like this one:
https://download.flukecal.com/pub/literature/2519570D-w.pdf )
which covers a large array of tests but I'm not sure which components
are
most likely to go out of spec and which tests are most useful. The
reference oscillator is likely number one on the list. Anything else
worth
checking?
--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/
mvus-list mailing list -- mvus-list@lists.febo.com
To unsubscribe send an email to mvus-list-leave@lists.febo.com
John,
Is there any chance you'll have your H-maser in time for the picnic?
And if so, how well would it tolerate being taken on road trips?
I know that the active H-masers don't tolerate travel at all well, and
that it typically a few days of recuperation for them to make any
pretense of working well, and weeks to really settle down. And
that's assuming that they were kept running during transit.
Dana
On Fri, Jul 2, 2021 at 10:10 AM John Ackermann via mvus-list <
mvus-list@lists.febo.com> wrote:
> Hi Trevor -- Daun may have a GPSDO or Rb running at his place. If not, I
> can bring something along, or you're always welcome to stop by my house
> where I can provide a number of accurate sources (and calibrated sig gen to
> check the RX side).
>
> John
>
> On Jul 2, 2021, 9:39 AM, at 9:39 AM, Trevor Clarke via mvus-list <
> mvus-list@lists.febo.com> wrote:
> >Just got an R2670 service monitor (Thanks Tom) and I'm interested in
> >seeing
> >how far the calibration has slipped so I was thinking of bringing it to
> >the
> >picnic. I'm not sure what tests would be best to run but I suspect
> >checking
> >the frequency counter against a gps or rubidium clock would cover a lot
> >of
> >the important circuitry. Probably check the display linearity and noise
> >characteristics too. The signal generator should probably be checked as
> >well.
> >
> >I know fluke has some useful cal app notes (like this one:
> >https://download.flukecal.com/pub/literature/2519570D-w.pdf )
> >which covers a large array of tests but I'm not sure which components
> >are
> >most likely to go out of spec and which tests are most useful. The
> >reference oscillator is likely number one on the list. Anything else
> >worth
> >checking?
> >
> >--
> >Trevor R.H. Clarke
> >Computer Science House
> >Rochester Institute of Technology
> >retrev@csh.rit.edu
> >http://www.csh.rit.edu/~retrev/
> >_______________________________________________
> >mvus-list mailing list -- mvus-list@lists.febo.com
> >To unsubscribe send an email to mvus-list-leave@lists.febo.com
> _______________________________________________
> mvus-list mailing list -- mvus-list@lists.febo.com
> To unsubscribe send an email to mvus-list-leave@lists.febo.com
>
