Gather Load Data Diagnostic

1 Diagnostic Link

Diagnostics >> System Function >> RF >> Driver Module Diagnostics

Diagnostics >> Hardware Location >> System Cabinet >> Driver Module Diagnostics

2 Purpose

This test checks the current draw on the Dynamic Disable (DD) and the Transmit/Receive (TR) bias lines.

3 Components Tested

Driver Module
LPCA
Cables
Connectors
Coil (if connected)

4 Requirements

None

5 Test Sequence

Refer to Table 1 Coil Parameters Matrix for the test voltage.

The data is sampled five (5) times for each line and then written to two (2) text files in /usr/g/service/log. You can then use the “more” or “cat” commands to view the contents of these files.

6 Expected Results

The data in each file is reported in Open (forward bias) and Short-circuit (reverse bias) modes. These modes refer to the fault conditions for which the Driver Module is always monitoring.

Values much greater than the typical values may indicate circuit damage or a short-circuit condition somewhere in the bias path. Values much less than the typical values may indicate circuit damage or an open-circuit (maybe a disconnected cable) condition somewhere in the bias path. Refer to Table 1 Coil Parameters Matrix for the typical values.

Run this test to troubleshoot intermittent problems and collect baseline data on any new surface coil. If troubleshooting one of these two scenarios, refer to the System Block Diagrams to help isolate the fault.

Table 1. Coil Parameters Matrix
Coil	Channel	Open Ckt(mA)	Short Ckt(mA)	Tx State Vol(v)
Express Anterior Array	1	50	-100	5
	2	50	-100	5
	3	50	-100	5
	4	50	-100	5
Express Head Neck Array	1	150	-100	7
	2	150	-100	7
	3	150	-100	7
	4	50	-100	7
	5	150	-100	7
	6	150	-100	7
	7	150	-100	7
	8	50	-100	7
Express Head Neck Adapter	1	0	0	0
	2	150	-100	7
	3	0	0	0
	4	50	-100	7
	5	150	-100	7
	6	150	-100	7
	7	0	0	0
	8	50	-100	7
Coils That Use the HD 2Ch Phase Array Adapter	1	100	-100	3
Coils That Use the HD 2Ch Phase Array Adapter	2	100	-100	3
HD 8Ch Shoulder Array	1	50	-100	5
	2	50	-100	5
	3	50	-100	5
	4	50	-100	5
	5	50	-100	5
	6	50	-100	5
	7	50	-100	5
	8	50	-100	5
HD 8Ch VIBRANT Breast Array	1	100	-100	5
	2	100	-100	5
	3	100	-100	5
	4	100	-100	5
	5	100	-100	5
	6	100	-100	5
	7	100	-100	5
	8	100	-100	5
HD Foot Ankle Array	1	50	-100	7
	2	50	-100	7
	3	50	-100	7
	4	50	-100	7
	5	50	-100	7
	6	50	-100	7
	7	50	-100	7
	8	50	-100	7
HD T/R Knee Array*	1	100	-100	7
	2	100	-100	7
	3	100	-100	3
	4	100	-100	3
	5	100	-100	3
	6	100	-100	7
	7	100	-100	7
	8	100	-100	3
HD Single Channel Surface Coil	1	100	-100	3
HD 8Ch Body Array	1	100	-100	5
	2	100	-100	5
	3	100	-100	5
	4	0	0	0
	5	0	0	0
	6	100	-100	5
	7	100	-100	5
	8	100	-100	5
HD 8Ch CTL Array	1	100	-100	7
	2	100	-100	7
	3	100	-100	7
	4	100	-100	7
	5	100	-100	7
	6	100	-100	7
	7	0	0	0
	8	0	0	0
HD 8Ch High Res Brain Array	1	50	-100	5
	2	50	-100	5
	3	50	-100	5
	4	50	-100	5
	5	50	-100	5
	6	50	-100	5
	7	50	-100	5
	8	50	-100	5
HD 8Ch NV Array	1	50	-100	5
	2	50	-100	5
	3	50	-100	5
	4	50	-100	5
	5	50	-100	5
	6	50	-100	5
	7	50	-100	5
	8	50	-100	5
HD T/R Knee/Foot	1	50	-100	3
HD Wrist Array	1	100	-100	5
	2	100	-100	5
	3	100	-100	5
	4	100	-100	5
	5	100	-100	5
	6	100	-100	5
	7	100	-100	5
	8	100	-100	5
Express Posterior Array*	1	150	-100	7
	2	50	-100	7
	3	150	-100	7
	4	50	-100	7
	5	150	-100	7
	6	50	-100	7
	7	150	-100	7
	8	50	-100	7
HD 4Ch Torso Array	1	0	0	0
	2	100	-300	3
	3	0	0	0
	4	100	-300	3
	5	100	-300	3
	6	0	0	0
	7	100	-300	3
	8	0	0	0
3Ch Shoulder Array	1	0	0	0
	2	0	0	0
	3	0	0	0
	4	150	-300	5
	5	100	-300	5
	6	100	-300	5
	7	0	0	0
	8	0	0	0
note: HD T/R knee array need test twice. Select 3V to check channel 3,4,5,8; select 7V to check channel 1,2,6,7. Express Posterior Array, please see channel 9~16 in result data.