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Operating Notes
5725A Operating Functions and Modes
3
3-9
3-6. 5725A Operating Functions and Modes
Warning
Both the 5700A and 5725A can produce fatal voltages. boosted
voltage operation produces high voltage at higher current
levels than normally available from the 5700A. during 5725A
voltage operation, the potential risk of injury or fatal accident is
greater than during unamplified 5700A voltage operation.
The 5725A has five normal modes of operation, including active output in its three
output functions: ac voltage, dc current, and ac current. The five normal operating modes
are:
• Standby (also referred to as "dormant" on the schematics)
• Voltage Standby
• Current Standby
• Voltage Operate
• Current Operate
Each normal operating mode is described in the following paragraphs. For the meaning
of FAULT, OVERLOAD, or CABLE OFF indications, refer to Table 3-1.
3-7. Standby
CURRENT
OUTPUT
HI
LO
VOLTAGE MODE
CURRENT MODE
5725A STANDBY
FAULT
OVERLOAD
CABLE OFF
11A
MAX
2OV
PK
MAX
NO OUTPUT
HI
HI
LO
LO
AUX
CURRENT
GUARD
GROUND
WIDEBAND
SENSE
V A
Ω
OUTPUT
V A
Ω
EX SNS
EX GRD
BOOST
µ
m
k
9
87
5
6
M
3
0
•
2
1
OPR
STBY
W BND
4
+/-
NO
OUTPUT
HI
BOOST
OFF
aq8i.eps
Figure 3-3. Standby Mode Indicator
Standby mode is when only the 5725A STANDBY indicator is lit. In standby mode, the
5725A is not supplying an output. However, the 5700A, depending on how it is set, can
be supplying up to 1100V or 2.2A. Standby occurs under any of the following
conditions:
• At power-up with no pending 5725A entry on the 5700A.
• When the 5725A is not selected in a 5700A setup menu as the amplifier for the
5700A output function in use, and the 5725A is not selected as the output location
for all 5700A current.