Register Definitions
B
E6198B Switch/Load Unit User Manual
B-75
Card Configuration (R) Base + 1
h
Measurement matrix card configuration and firmware revision
(FWR) register. Initial firmware revision = 0
h
Status and Control (R/W) Base + 2
h
This register reads back the card's status. It can also be used to
Reset and Open All Relays (OAR).
Read Only:
• Busy~
: 0 indicates busy, 1 indicates not busy.
Write and Read Bits:
• OAR:
0 causes no change, 1 causes all relays to open.
• Reset:
0 causes no change, 1 causes board reset and triggers
the relay timer. Clears itself afterward.
Not Used Base + 3
h
Register offset 3
h
used only for placeholder to make software
addressing simpler.
Abus control and protection bypass relay (W) Base + 4
h
Measurement matrix card Abus and protection bypass relay
control register. All relay control registers are positive-true
logic: writing 0 opens the relay and writing 1 closes the relay.
•
Writing to PB4-PB1 sets state of protection bypass relays.
•
Writing to AB4-AB1, sets state of Abus disconnect relays.
Bits
7
6
5
4
3
2
1
0
Read
FWR3
FWR2
FWR1
0
0
0
0
0
Bits
7
6
5
4
3
2
1
0
Read
Busy~
0
OAR
0
X
X
X
Reset
Bits
7
6
5
4
3
2
1
0
Write
AB4
AB3
AB2
AB1
PB4
PB3
PB2
PB1
Summary of Contents for E6198B
Page 10: ...x E6198B Switch Load Unit User Manual THIS PAGE IS INTENTIONALLY LEFT BLANK...
Page 198: ...7 10 E6198B Switch Load Unit User Manual 7 Using the Custom Card Figure 7 8 E8794A Schematic...
Page 313: ...G 1 Agilent TS 5000 E6198B Switch Load Unit User Manual Agilent Technologies Glossary Of Terms...
