[time-nuts] 5071A with ATTENTION flashing

paul swed paulswedb at gmail.com
Wed Nov 9 10:19:05 EST 2016


I saw the low CBT temp also and 10 degrees C seem like allot. However in
the 5060/5061 Frankenstein I run the oven at +10 degrees (approx.) to what
the tube asks for. To drive C fumes out of the oven. A possible assumption
is the cooler oven is emitting fewer C's and the emult is trying to make up
for it.

Li
If it were mine and I checked the other suggestions. I would if convenient
actually attempt to raise the oven temp a bit to see what happens. I would
measure current and use an external supply to match it and then gently
increase the current. But from the thread you do not own it and I think a
large amount of money was at stake.

Regards
Paul
WB8TSL


On Wed, Nov 9, 2016 at 7:52 AM, Scott McGrath <scmcgrath at gmail.com> wrote:

> that's telling you that the CBT oven is not up to temp  so you could have
> a failed heater in the tube or the oven controller is malfunctioning
>
> The former well you need a new tube which symmetricom will be happy to
> sell you for a 5 figure price tag.
>
> The latter is limited by your repair skills and parts and data availability
>
> Content by Scott
> Typos by Siri
>
> > On Nov 9, 2016, at 7:42 AM, Li Ang <379998 at qq.com> wrote:
> >
> > According to the Log, "CBT Oven Err: -9.55 C" might be something wrong.
> However, I can't find the correct range in the manual. Does anyone have the
> information about this parameter?
> >
> >
> > Regards
> > Li Ang
> >
> >
> >
> >
> > ------------------ Original ------------------
> > From:  "Li Ang";<379998 at qq.com>;
> > Date:  Wed, Nov 9, 2016 02:48 PM
> > To:  "Tom Van Baak"<tvb at leapsecond.com>; "Discussion of precise time
> and frequency measurement"<time-nuts at febo.com>;
> >
> > Subject:  Re: [time-nuts] 5071A with ATTENTION flashing
> >
> >
> >
> > Hi Tom
> >
> > I have collected the log from it. Log level is service. The 9.2G pll
> pass the test today. The log during the power-up process is also included.
> >
> >
> > Regards
> >
> > Li Ang / BI7LNQ
> >
> > -------------------------------------
> >
> >
> >
> > scpi >
> >
> > MJD        0 02:02:18
> >
> > CBT ID: 3128A00642(H)
> >
> > Status summary: Fatal Error (see Log)
> >
> > Power source: AC
> >
> > Log status: One entry
> >
> >
> > Freq Offset:          0e-15  Osc. control:     -9.56 %
> >
> > RF amplitude 1:     6.3 %    RF amplitude 2:     6.3 %
> >
> > Zeeman Freq:      39949 Hz   C-field curr:    12.213 mA
> >
> > E-multiplier:      2553 V    Signal Gain:       14.4 %
> >
> >
> > CBT Oven:           0.0 V    CBT Oven Err:     -9.55 C
> >
> > Osc. Oven:         -9.1 V    Ion Pump:           0.4 uA
> >
> > HW Ionizer:        -0.1 V    Mass spec:        12.3 V
> >
> > SAW Tuning:         0.0 V    DRO Tuning:         7.3 V
> >
> > 87MHz PLL:          0.8 V    uP Clock PLL:       1.8 V
> >
> > +12V supply:       12.3 V    -12V supply:      -12.3 V
> >
> > +5V  supply:        5.4 V    Thermometer:       46.2 C
> >
> >
> >
> > scpi >
> >
> > scpi > ?
> >
> > E-103> exit
> >
> > E-113>
> >
> > E-113> Log status: One entry
> >
> >
> > Log 000 of MJD        0 00:12:40:  Low Cs signal (60) with max Emult
> >
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> >
> > E-113>
> >
> > E-113> PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> > PASS: CBT mass spec test
> >
> > PASS: CPU RTDS test
> >
> > PASS: CPU clock locked test
> >
> > PASS: DDFS register test
> >
> > PASS: 87MHz PLL test
> >
> > PASS: 9.2 GHz PLL test
> >
> > PASS: Servo register test
> >
> > PASS: Servo convertor timeout test
> >
> > PASS: Interface register test
> >
> > PASS: Interface abus test
> >
> > PASS: Pps register test
> >
> > PASS: Pps interrupt test
> >
> > PASS: power logic signals test
> >
> > PASS: CBT register test
> >
> > PASS: CBT window comp test
> >
> > PASS: CBT therm test
> >
> > PASS: CBT Cs oven test
> >
> > PASS: CBT hw ion test
> >
> >
> > E-113>
> >
> > E-113> scpi >
> >
> > scpi >
> >
> > Performing hardware tests
> >
> > PASS: CBT register test
> >
> > PASS: DDFS register test
> >
> > PASS: Servo register test
> >
> > PASS: Interface register test
> >
> > PASS: Pps register test
> >
> > Warming up
> >
> > Osc. oven is up
> >
> >
> > MJD        0 00:00:29
> >
> > CBT ID: 3128A00642(H)
> >
> > Status summary: Warming up
> >
> > Power source: AC
> >
> > Log status: One entry
> >
> >
> > Freq Offset:          0e-15  Osc. control:     -9.56 %
> >
> > RF amplitude 1:     6.3 %    RF amplitude 2:     6.3 %
> >
> > Zeeman Freq:      39949 Hz   C-field curr:    12.213 mA
> >
> > E-multiplier:      1524 V    Signal Gain:       14.4 %
> >
> >
> > CBT Oven:          20.6 V    CBT Oven Err:     -9.55 C
> >
> > Osc. Oven:         -9.0 V    Ion Pump:           0.4 uA
> >
> > HW Ionizer:         1.0 V    Mass spec:        12.3 V
> >
> > SAW Tuning:         0.0 V    DRO Tuning:         7.3 V
> >
> > 87MHz PLL:          0.8 V    uP Clock PLL:       1.8 V
> >
> > +12V supply:       12.2 V    -12V supply:      -12.2 V
> >
> > +5V  supply:        5.4 V    Thermometer:       45.0 C
> >
> >
> >
> > scpi >  Cs oven is up
> >
> > F(z) = 39948.9 Hz
> >
> > Low Cs beam signal = 3
> >
> > Raising emult voltage...
> >
> > Low Cs signal (37) with max Emult
> >
> > Fractional freq. offset is -0.000000e+00
> >
> > Fatal Error (see Log)
> >
> >
> > scpi >
> >
> > scpi > Log status: 2   entries
> >
> >
> > Log 000 of MJD        0 00:12:40:  Low Cs signal (60) with max Emult
> >
> > Log 001 of MJD        0 00:09:59:  Low Cs signal (37) with max Emult
> >
> >
> >
> > MJD        0 00:13:46
> >
> > CBT ID: 3128A00642(H)
> >
> > Status summary: Fatal Error (see Log)
> >
> > Power source: AC
> >
> > Log status: 2   entries
> >
> >
> > Freq Offset:          0e-15  Osc. control:     -9.56 %
> >
> > RF amplitude 1:     6.3 %    RF amplitude 2:     6.3 %
> >
> > Zeeman Freq:      39949 Hz   C-field curr:    12.213 mA
> >
> > E-multiplier:      2553 V    Signal Gain:       14.4 %
> >
> >
> > CBT Oven:           0.0 V    CBT Oven Err:     -8.22 C
> >
> > Osc. Oven:         -9.1 V    Ion Pump:           1.0 uA
> >
> > HW Ionizer:         0.0 V    Mass spec:        12.2 V
> >
> > SAW Tuning:         0.0 V    DRO Tuning:         7.3 V
> >
> > 87MHz PLL:          0.8 V    uP Clock PLL:       1.7 V
> >
> > +12V supply:       12.3 V    -12V supply:      -12.3 V
> >
> > +5V  supply:        5.4 V    Thermometer:       46.4 C
> >
> >
> >
> > scpi > Log status: 2   entries
> >
> >
> > Log 000 of MJD        0 00:12:40:  Low Cs signal (60) with max Emult
> >
> > Log 001 of MJD        0 00:09:59:  Low Cs signal (37) with max Emult
> >
> >
> >
> > ---Original---
> > From: "Tom Van Baak"<tvb at LeapSecond.com>
> > Date: 2016/11/4 00:42:46
> > To: "Discussion of precise time and frequency measurement"<
> time-nuts at febo.com>;
> > Subject: Re: [time-nuts] 5071A with ATTENTION flashing
> >
> >
> > Hi Li,
> >
> > The "Low cs signal with max Emult" is the classic error indicating it's
> out of gas. That's a bad sign. But the "9.2GHz PLL test 10.3v" is something
> else. So maybe there's hope? Or maybe you have two big problems instead of
> one. Rick might know.
> >
> > For additional information, connect a PC to the serial port and capture
> the diagnostic information. Right after power up, press TOP -> CONFIG ->
> LOG -> SERVICE to set the unit into verbose diagnostic mode. You should see
> lines print every now and then as it undergoes self test and calibration.
> >
> > You can also press TOP -> INFO -> PRINT to get a nicely formatted
> summary. Or TOP -> LOG -> PRINT to get the entire log history. That
> sometimes has lots of clues. The advantage of using the serial port is you
> get a permanent record of all this information. Viewing all this by the LCD
> screen can be tedious.
> >
> > There's more information in 05071-90040, the 5071A Assembly-Level
> Service Manual, copies of which are on the web. Also 05071-90041, Operating
> and Programming Manual.
> >
> > /tvb
> >
> > ----- Original Message -----
> > From: "Li Ang" <379998 at qq.com>
> > To: "time-nuts" <time-nuts at febo.com>
> > Sent: Thursday, November 03, 2016 8:10 AM
> > Subject: [time-nuts] 5071A with ATTENTION flashing
> >
> >
> >> Hi
> >> Today I met one HP 5071A with option 001 at one secondhand equipment
> company. This one can not enter CONTINUOUS OPERATION status, the ATTENTION
> led flashes.
> >> There is a "Low cs signal with max Emult" error in the log. I have run
> the self-test, and it stopped at "9.2GHz PLL test 10.3v".  I can only
> remember the the pump current was 0.8uA or less, C-filed was about 12mA.
> >>  The seller is asking for about 4000$, I am wondering if it's
> repairable. Since it is a "HP" branded 5071A with 001 option,  I do not
> know if the Cs tube is dying or not, according to the two current values?
> >>  How do I know one 5071A/5061/5062 is dying or is still in good health
> by the readings?
> >>
> >>
> >> Thanks
> >>
> >>
> >> de BI7LNQ
> >
> >
> > _______________________________________________
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