[time-nuts] 5071A with ATTENTION flashing

Scott McGrath scmcgrath at gmail.com
Wed Nov 9 07:52:48 EST 2016


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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