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Programmable RF Attenuator
Commit 7cb62a29 authored by Dimitris Lampridis's avatar Dimitris Lampridis
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doc: Improve testing procedure

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doc/docs/factory-testing-procedure.md
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......@@ -99,6 +99,9 @@ new serial recorded!
quitting, please restart the test program
```
4. Following the EEPROM programming, the test program will automatically terminate.
5. Unplug and replug the USB cable of the DUT to perform a power cycle.
6. Verify that all four channels power up at -40dB attenuation (a quick flicker
during power up is to be expected).
!!! hint
......@@ -139,7 +142,9 @@ oatt> set_attn 1 0dB
```
6. Verify that the 0dB LED of channel 1 is on.
7. Look at the screen of the NA to see if it's around 0 dB (±3dB) in the whole
bandwidth (up to 2 GHz).
bandwidth (up to 2 GHz). Close to the limit of 2 GHz it is ok if it goes a
bit beyond ±3dB. However, look out for sudden spikes/dips (in the order of
±6dB or more) across the whole measured bandwidth.
8. Repeat steps 5 to 7 for -20dB and -40dB attenuation levels.
9. Repeat steps 4 to 8 for DUT channels 2, 3 and 4.
10. Close the access to the DUT via the `close` command.
......
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