DIOT system power rail performance

[gkasprow]

Measure 12V rail crosstalk and resistance.

1. Connect the DMM to the J3 connector on the first slot
2. Connect the DMM to the J3 connector on the second slot
3. Enable heaters on card 1; run them at two power levels (2A and higher)
4. Measure voltage for both power levels and without heaters on both cards
5. Repeat steps 1-4 for the next slots, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 1-4, 1-8, 4-8
6. Calculate the voltage drop for both cases, calculate internal rail resistance for each slot and crosstalk value

[gkasprow]

Repeat it for the standard SINARA setup with Kasli and EEM ribbon cables. Make sure that 12V load current does not exceed 2A per card.

[knorowski]

Results for DIOT crate

Card_A	Card_B	Voltage_Drop_2A [mV]	Voltage_Drop_4A [mV]	Rail_Resistance_2A [mOhm]	Rail_Resistance_4A [mOhm]	Crosstalk_2A [mV]	Crosstalk_4A [mV]
DT00	DT01	75.6	154.3	37.8	38.6	4.0	8.1
DT01	DT02	74.6	151.7	37.3	37.9	3.1	7.8
DT02	DT03	73.1	148.7	36.5	37.2	3.2	7.5
DT03	DT04	73.5	150.4	36.7	37.6	2.9	6.7
DT04	DT05	73.8	150.3	36.9	37.6	2.6	6.0
DT05	DT06	72.7	148.8	36.3	37.2	2.1	5.9
DT06	DT07	71.9	145.4	36.0	36.4	2.0	5.1
DT07	DT08	71.8	145.8	35.9	36.4	1.9	4.6

Voltage_Drop_2A / Voltage_Drop_4A – power-rail voltage drop at card “Serial_A” (relative to the no-load baseline) under the 2A/4A load condition.

Crosstalk_2A / Crosstalk_4A – power-rail voltage drop at card “Serial_B” (relative to the no-load baseline) when card “Serial_A” is loaded with the 2A/4A load condition.