[time-nuts] Fw: FTS 4060 Cesium Time & Frequency Standard, Datum

[Tom Miller]

Just to get this data on the list.

Here are the measured voltages on U1:

Pin     Fn                      Voltage         Limits
9        Beam I                0.001            1.01 to 3.73
18      Ion Pump E        2.436            1.72 to 3.01
7        Ion Pump I            0.020            0 to 2.0
19      Elec Multi E        2.060            0.84 to 3.01
17      C-Field I              3.65              3.28 to 4.45   (front panel sw set at 500)
16      Cs Oven T          1.379            1.27 to 1.55
20      Xtal Oven Pwr    3.57              2.81 to 3.91
3        180 MHz Lvl        2.784            0.1 to 4.8
2        12.6 MHz Dig     4.84               4.0 to 5.0
23      12.6 MHz Ana    1.34               0.35 to 4.28
6         +5 Supply           2.427            2.35 to 2.68
4         +18 V Supply     2.484            2.42 to 2.68
22       - 18 V Supply     2.481            1.72 to 3.52
21        Chassis T          3.045            2.62 to 3.44

  
It has been on for four days. 

When I compare the 10 MHz out to my GPSDO, the frequency matches up when the control (meter 4) passes 3.2 volts. There is no movement in the Beam current (meter 3) as control sweeps. 



Tom



  ----- Original Message ----- 
  From: Tom Knox 
  To: Tom Miller ; Time-Nuts 
  Sent: Wednesday, October 02, 2013 2:00 PM
  Subject: RE: [time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum



  If anyone has a service manual I am also very interested. Thanks
  Thomas Knox 



  > From: tmiller at skylinenet.net
  > To: time-nuts at febo.com
  > Date: Wed, 2 Oct 2013 13:22:45 -0400
  > Subject: Re: [time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum
  > 
  > Hello Corby,
  > 
  > Thanks for the help. Yes, could you copy me on the information for the U1 
  > chip? I do not have anything other than the user manual from Brooke. At this 
  > time, anything will be a great help.
  > 
  > 
  > Best regards,
  > Tom
  > 
  > 
  > ----- Original Message ----- 
  > From: <cdelect at juno.com>
  > To: <time-nuts at febo.com>
  > Sent: Wednesday, October 02, 2013 11:47 AM
  > Subject: [time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum
  > 
  > 
  > Tom,
  > 
  > On the 4060 you can easily monitor the Ion pump voltage and current, the
  > electron multiplier voltage, and other important parameters by measuring
  > the voltages on the U1 chip on the uP board.
  > This saves you fronm having to diconnect stuff to measure the HV and
  > such.
  > If you don't have a manual showing the pins of U1 I can post to pinout
  > here on Time Nuts.
  > 
  > Corby
  > 
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