Quantum Composers 9500 Plus Series - Manual (Page 55)

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Appendix B - Special Functions
35 Volt Output
For units with the optional 35 volt output, additional BNC connectors are pro- vided on
the rear panel. The 35 volt output can be enabled independently for each of the
channels from the channel output mode menus. When enabled, the rear panel
outputs will provide an adjustable output from 5 volts to 40 volts and the timing will be
calibrated to all other channels. The front panel output will be in the TTL/CMOS
mode. However, the timing will not be as accurate as the unit is using the 35 volt
calibration factors. Typically, the rising edge is within 10 ns but the pulsewidth is off by
over 200 ns. The pulsewidth can be set over the standard range of the unit to allow full
use of the front panel outputs, but the 35 volt output will self limit to approximately 4 us
with some droop. To maintain the highest possible rise time, care must be taken with
cabling and termination.
Low capacitance cable and 50 ohm termination will provide the fastest rise times
without overshoot. Faster rise times can be achieved by increasing the
termination resistance, but some overshoot is likely to occur.
Keyword
Lower-Level
Keyword
Parameter
Std /
New
Comments
:PULSe [1 / 2 / n] Std
Subsystem. Contains commands to control the
output pulse generation. Valid suffix range
depends on the number of channels (ChA = 1,
ChB = 2, etc). Command without suffix refers
to the currently selected logical instrument.
See INSTrument subsystem.
:MODe
TTL / ADJustable
/ 35 V
New
Selects output mode: TTL?CMOS,
Adjustable, or 35 Volt.
:AMPLitude 2.00 - 35.00 New
Sets Adjustable output level. Note that 35 V
option AMPLitude can only be set when
channel is in 35 V mode.
NOTE: The 35 V output frequency is limited to less than 1000 Hz.
35 V Specifications
Resolution 200 mV
Accuracy 200 mV
OUTPUT AMPLITUDE