Rohde & Schwarz HMC804, Руководство пользователя

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55
Advanced Operating Functions
55
Advanced Operating Functions
CH1 CH2 CH3
16 V
2 A
16 V
2 A
Fig. 6.9: Example for parallel mode
16 V
4 A
recommended to set the current limit of the channel that
is to supply the main current to a fraction of the current.
This approach handles the semiconductor with care and
improves the heat dissipation, as the power loss is distri-
buted more evenly.
6.7 Multi-Quadrant Operation
In general, operating in multi-quadrant mode requires a
multi-quadrant power supply. The R&S®HMC804x is only a
1-quadrant power supply which is able to provide positive
voltage or positive current (quadrant I). However, a nega-
tive voltage can be generated by means of a special con-
nection of two channels (common GND). Fig. 6.11 shows a
connection example for a R&S®HMC8043, the connection
for the R&S®HMC8042 is identical. This type of connec-
tion can generally reach a range between -32V and +32V.
This does not refer to a negative display on the screen,
but rather to a connection with an identical voltage range.
However, a negative current (current sink) is not possible.
Fig. 6.10: Power supply quadrants diagram
Fig. 6.11: R&S®HMC8043 connection
6.8 Statistic
The R&S®HMC804x includes an internal statistic func-
tion which is able to determine statistic values (Min/Max,
Mean, Count) for current and voltage for each channel.
Open the Statistic menu via MEAS key and soft menu
STATS. Use the soft menu key STATS to activate (ON) or
deactivate (OFF) statistic values. Use the soft menu key
CLEAR to reset statistic values and to determine new
values. The R&S®HMC8043 does not allow the simulta-
neous display of the statistic and the channel values. In
this case, the statistic runs in the background and has to
be accessed via MEAS menu. The R&S®HMC8042 and
R&S®HMC8041 allow for the statistic to be displayed
below the channel values. The statistic values can only be
determined individually for each channel.
6.9 Energy Meter
The ENERGY function enables you to show the energy
released at the output in Ws in the display. Use the soft
menu key ACTIVATE to connect this COUNTER individu-
ally for each channel (CHANNEL) or use the soft menu key
CLEAR to reset it. The soft menu key HOLD enables you
to freeze the current released energy values in the display.
Press the soft menu key HOLD again to deactivate the
function.
Fig. 6.12: Statistic menu R&S®HMC8043
Fig. 6.13: Statistic example R&S®HMC8042
A negative voltage range can only be generated by means of a
special connection of two channels. A negative voltage range can
not be generated by one channel.