# 3 channels LIA with MP

**URL:** <https://forum.liquidinstruments.com/t/3-channels-lia-with-mp/493>\
**Category:** Projects & Applications\
**Created:** [March 17, 2022, 8:00am UTC](https://forum.liquidinstruments.com/t/3-channels-lia-with-mp/493 "2022-03-17T08:00:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![SpringTechDavid](https://avatars.discourse-cdn.com/v4/letter/s/ad7895/32.png) [@SpringTechDavid](https://forum.liquidinstruments.com/u/SpringTechDavid)\
**Post date:** [March 17, 2022, 8:00am UTC](https://forum.liquidinstruments.com/t/3-channels-lia-with-mp/493/1 "2022-03-17T08:00:01Z")

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![3channels LIA](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/fb93eb709e85c341aa8fc1108f0299a0dd9ad832.jpeg)  
just wondering … will this config work to check 3 photo diodes performance with a common carrier generated by the waveform generator?

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**Author:** ![PaulC](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.liquidinstruments.com/paulc/32/23_2.png) [@PaulC](https://forum.liquidinstruments.com/u/PaulC)\
**Post date:** [March 17, 2022, 8:31pm UTC](https://forum.liquidinstruments.com/t/3-channels-lia-with-mp/493/2 "2022-03-17T20:31:04Z")

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Hi David,

yes, this configuration of 3 LIAs would work. In fact you dont even need the WG in slot 1 since the LIAs can output their local oscillators (LO) to the output B. See the attached screenshots.

Regards,

Paul.

 ![Slot 3 and 4 LIAs](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/83283932f5ab05616a1b80ca7b2953066d9e7bbf.png)  
 ![Slot 2 LIA](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/b71fb096ad8ca3eab39f861d3a0c419adddfca9c.png)  
 ![3 LIAs config.PNG](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/93a6531738dde779c60acb8185a26890c7318d1c.jpeg)