3-18
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Section Topics
2308-900-01 Rev. A / July 2008
Section 3: Pulse Current Measurements
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Table 3-4
PCURrent FAST, SEARch, and DETect commands
FAST SEARCH
DETECT
DESCRIPTION
ON
ON
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
OFF
The unit is most responsive to bus commands in this mode. The supply
does not wait for TOUT or search time for background pulse current
readings and TLEV command checks. front panel displays FAST HI / LO /
AVG (in remote mode) instead of PCUR HI / LO / AVG (if in local mode).
The bottom line may show a previous reading or dashes based on what
commands were sent previously when in remote mode.
With FAST set to ON, no pulse detection between user-triggered readings
occurs, no checking for the parameter of PCUR TLEV commands to detect
a pulse occurs, no setting of the pulse trigger timeout bits in the status
model between user-triggered readings occurs. front panel has no
indication that pulse is not detected. Over the bus, an overflow reading
indicates no pulse detected when asked for a user triggered reading.
For triggered readings, the PTT (Pulse Trigger Timeout) bit is latched until
read so the bit may still be set in the status model from a previous timeout
(see
Section 7
on the status model for more information-Model 2308 User's
Manual). For triggered readings, the PTT (Pulse Trigger Timeout) bit will be
set if the reading times out and the pulse is not detected.
OFF
OFF
OFF
OFF
ON
OFF
The unit is more responsive to bus commands in this mode since the supply
does not need to wait for TOUT or search time for pulse current background
readings. However, the supply does need to wait for TOUT or search time
when checking the parameter setting for TLEV commands. Refer to
Figure
3-5
. front panel displays NO SEARCH instead of PULSE HI / LO / AVG. The
bottom line may show a previous reading or dashes based on what
commands were sent previously when in remote mode.
The setting of the pulse trigger timeout bits in the status model will only
occur between user-triggered readings if TLEV commands are sent. For
triggered readings, the PTT (Pulse Trigger Timeout) bit will be set if the
reading times out and the pulse is not detected. Also, since the PTT bit is
latched until read, the bit may still be set in the status model from a previous
timeout (see
Section 7
on the status model for more information-Model
2308 User's Manual).
Shaded cells designate command with precedence in each mode.
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