.. |MLA (TM)| unicode:: MLA U+2122
.. |ImLA (TM)| unicode:: ImLA U+2122
.. |(TM)| unicode:: U+2122

.. index:: multifrequency lockin amplifier, MLA, Intermodulation Lockin Analyzer, ImLA, connections, front-side connections, back-side connections,  triggering, inputs, outputs, independent lockins


.. _mla-label:

Multifrequency Lockin Amplifier
===============================

Version III
+++++++++++

For the |MLA (TM)|-3, please refer to the online manual at
https://intermodulation-products.com/manuals/IMP-MLA_user_manual/mla.html


Version II
++++++++++

For the |MLA (TM)|-2, please refer to the online manual at
https://intermodulation-products.com/manuals/IMP-MLA_user_manual/mla_2.html

Version I
+++++++++

Version I of the |MLA (TM)| (or |ImLA (TM)|)  has fewer connections and can handle fewer frequencies.


**Front-side connections**

* ``Signal OUT`` sends the drive frequency comb to the shaker piezo of the AFM.  The system is configured to work nicely with standard AFMs.  Internal jumpers can be moved to change the output voltage range.  Contact Intermodulation Products if you want different output range.

* ``Feedback OUT`` delivers a error signal to the host AFM, where zero volts corresponds to the set-point in the AFM Suite.  When the host AFM is set to contact mode, with set-point zero in the host AFM software, The voltage sent by the Feedback Out port constitutes the error signal in the control of the AFM feedback.  The feedback gains are set on the host AFM.

* ``Signal IN`` receives the detector signal from the AFM.  The system is configured to work nicely with standard AFMs.  Attenuators can be used to reduce the amplitude of the input signal if necessary.  Contact Intermodulation Products if you want a different input range.

* ``EOF TRIG IN``  is the **End Of Line** signal which is generated by the host AFM and received by the |MLA (TM)|.    

* ``EOL TRIG IN`` is the **End of Frame** signal which is  generated by the host AFM and received by the |MLA (TM)|.


**Back-side connections** 

* ``+5V DC``  powers the |MLA (TM)|.  One should always use the power supply delivered with |MLA (TM)|.  Using any other supply voids the warranty.

*  ``Ethernet`` The |MLA (TM)| communicates with the computer via the Ethernet connection.  The |MLA (TM)| may be directly connected to the Ethernet connection on the computer, or it may be be put behind an Ethernet router, switch or gateway.

* ``10 MHz OUT`` is a TTL sync signal for locking the |MLA (TM)| clock to external equipment.  


Version I Firmware
------------------

Two basic firmware versions are available

* IMP-2-23 :  Two drive frequencies at the ``Signal Out`` port.  32 frequencies analyzed at the ``Signal IN`` port.

* IMP-24-24 :  24 drive frequencies at the ``Signal Out`` port and the same 24 frequencies are analyzed at the ``Signal IN`` port.