====== Checklist after power failure ======

<note important>If you know a power failure will come, than turn off everthing (without Meerstetter, IGP´s and H-Maser)! And organise a lot of USV´s!!!!</note>


**Check both IGP Controller for the resonators R1 + R2**
    * Current should be below 2 mA (both should show "HV ON" (green LED on)
    * Check both USV for IGP´S

**Turn on the computers**

**Check Meerstetter TEC for R1 + R2 + ECDL** 
    * Green LED on? 
    * Check in the software //TEC Service v2.70 - R1//, //TEC Service v2.70 - R2// and //TEC Service v2.70 - ECDL Baseplate// on the ResLab-PC: 
      * How is the behavior of the temperature?
    * Check both USV for TEC´s
 
**Check the air conditioner for the entire room**
    * Is the air-conditioning system switched on?
      * Is the V-belt (=Keilriemen) broken?
    * What is the temperature of the draft (=Zugluft)? -> should be >20 °C
      * Check the electric fuse (=Sicherung) on the third floor

**Check the H-Maser**
    * All LED are green?
    * Check in the Software //VCH// on the ResLabMobil:
      *  All values except for D2h must be green!

**Check the 914nm-laser**
    * Light is on? Powermodule is on?  
    * TA stabilization is ok?
    * Laserdiode is on?
    * How much power is in front of the resonator? -> should be 70-100 µW
    * What wavelength does the Wavemeter display?

**Check the 10 MHz reference and set all frequencies in the lab**
    * GPS-Receiver is working?
      * LED flashes orange/yellow?
        * If not Turn on the PWR switch until LED flashes
        * Start the software //Net View// and connect the receiver (COM Port2)
    * Rb-clock is working?
      * Check the LED´s: 
        * //Power//-LED and //Locked//-LED have to be green
        * //1 pps sync//-LED has to be green
        * //1 pps input//-LED has to flash
      * Check the 10 MHz-frequency output with an spectrum analyzer, if there is 10 MHz.
    * Check the 10 MHz distributor synthesizer
      * Ext refernce //10 MHz direct// is working?
      * Set correct values
    * Check all other synthesizer
      * Ext refernce //10 MHz direct// is working?
      * Set correct values  

**Check frequency comb**
     * Laser and amplifier are on?
       * Check LED´s
     * Do the software //fiber laser// and //fiber comb control// work?
       * Can you speak with the comb?

**Check the counter**
  * Does the software //FXQE80// work?
   * If not: Turn off and on the counter (cold-device plug disconnect and connect)

**Check the fiber Link to PTB**
  * Turn everthing on, like ther spectrum analysizer
  * Restart the PC in the Atom Lab
  * Call them!

**If the temperature is normal again, then...**
  - Stabilize the laser of R1
    - Turn on the Laserdiode
    - Turn on the TA
    - Couple the light into the TA
    - Turn on the TA stabilization
    - Lock R1
  - Stablize the frequency comb
    - Lock Ceo
    - Lock Rep
  - Measure the frequencies with the counter:
    - 914nm
    - frep
    - 10 MHz
    - virtuel beat