FTS1050 out of range
I have an FTS1050A/015 that is slightly out of range (frequency too high by 0.3 Hz with front panel adjustment set to 00000). Does this indicate that something is wrong with the control circuitry or the oscillator, or is there an internal gross adjustment that I can use to reset the range?
Thanks!
Hi
At 0.3 Hz, you are off by 3x10^-8. That’s not very far. Best
guess is that the unit is doing fine. It simply has aged further
than the adjustment range. It is fairly common to design an
OCXO with a range that is adequate for some number of
years. They do indeed “age out”.
No idea if there is a manual adjust internal to the unit.
Bob
On Feb 23, 2023, at 8:29 AM, AC0XU (Jim) via time-nuts time-nuts@lists.febo.com wrote:
I have an FTS1050A/015 that is slightly out of range (frequency too high by 0.3 Hz with front panel adjustment set to 00000). Does this indicate that something is wrong with the control circuitry or the oscillator, or is there an internal gross adjustment that I can use to reset the range?
Thanks!
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To unsubscribe send an email to time-nuts-leave@lists.febo.com
Hi
In the 1050A I looked at recently the 1000B trim pot was not installed. Most likely the board is simply unpopulated and the adjustment is done with the front panel decades. Not sure if the 1050A decade has the same range as the 1000B pot?
Cheers;
Tom Knox
SR Test and Measurement Engineer
Phoenix Research
4870 Meredith Way Apt 102
Boulder, Co 80303
Formerly of:
357 Fox Lane
Superior Co 80027
303-554-0307
actast@hotmail.com
"Peace is not the absence of violence, but the presence of Justice" Both MLK and Albert Einstein
From: Bob Camp via time-nuts time-nuts@lists.febo.com
Sent: Thursday, February 23, 2023 3:47 PM
To: Discussion of precise time and frequency measurement time-nuts@lists.febo.com
Cc: AC0XU (Jim) James.Schatzman@ac0xu.com; Bob Camp kb8tq@n1k.org
Subject: [time-nuts] Re: FTS1050 out of range
Hi
At 0.3 Hz, you are off by 3x10^-8. That’s not very far. Best
guess is that the unit is doing fine. It simply has aged further
than the adjustment range. It is fairly common to design an
OCXO with a range that is adequate for some number of
years. They do indeed “age out”.
No idea if there is a manual adjust internal to the unit.
Bob
On Feb 23, 2023, at 8:29 AM, AC0XU (Jim) via time-nuts time-nuts@lists.febo.com wrote:
I have an FTS1050A/015 that is slightly out of range (frequency too high by 0.3 Hz with front panel adjustment set to 00000). Does this indicate that something is wrong with the control circuitry or the oscillator, or is there an internal gross adjustment that I can use to reset the range?
Thanks!
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
On the off chance that there is a problem with the switch assembly
it might be worth trying to adjust with external control. The manual
specifies a range of 1 to 10 VDC. I've never tried it on my 1150, but
I'd assume that it takes a pretty well regulated DC supply. And, of
course, a lot of patience. Mine has never settled down, which is why
I got it for a song. The GSA FAA sale description stated so, but I
thought maybe it might be something simple. That was 40 years ago.
They were right!
John K0GCJ
On Thu, Feb 23, 2023 at 6:14 PM Tom Knox via time-nuts <
time-nuts@lists.febo.com> wrote:
Hi
In the 1050A I looked at recently the 1000B trim pot was not installed.
Most likely the board is simply unpopulated and the adjustment is done with
the front panel decades. Not sure if the 1050A decade has the same range as
the 1000B pot?
Cheers;
Tom Knox
SR Test and Measurement Engineer
Phoenix Research
4870 Meredith Way Apt 102
Boulder, Co 80303
Formerly of:
357 Fox Lane
Superior Co 80027
303-554-0307
actast@hotmail.com
"Peace is not the absence of violence, but the presence of Justice" Both
MLK and Albert Einstein
From: Bob Camp via time-nuts time-nuts@lists.febo.com
Sent: Thursday, February 23, 2023 3:47 PM
To: Discussion of precise time and frequency measurement <
time-nuts@lists.febo.com>
Cc: AC0XU (Jim) James.Schatzman@ac0xu.com; Bob Camp kb8tq@n1k.org
Subject: [time-nuts] Re: FTS1050 out of range
Hi
At 0.3 Hz, you are off by 3x10^-8. That’s not very far. Best
guess is that the unit is doing fine. It simply has aged further
than the adjustment range. It is fairly common to design an
OCXO with a range that is adequate for some number of
years. They do indeed “age out”.
No idea if there is a manual adjust internal to the unit.
Bob
On Feb 23, 2023, at 8:29 AM, AC0XU (Jim) via time-nuts <
time-nuts@lists.febo.com> wrote:
I have an FTS1050A/015 that is slightly out of range (frequency too high
by 0.3 Hz with front panel adjustment set to 00000). Does this indicate
that something is wrong with the control circuitry or the oscillator, or is
there an internal gross adjustment that I can use to reset the range?
Thanks!
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com