4.6-10 Section 4: Using the Model 9100: AC Current Function
Final Width = 215mm
4.6.5.2 Frequency Resolution Thresholds
The different frequency resolutions are distinguished by two characteristics:
• Lowest and highest frequencies available.
• Absolute resolution of the least-significant digit.
The following table shows the spans of output frequencies in the AC Current function,
for 'sinusoidal waveshape only, against their associated resolutions.
A frequency limit of 1kHz is placed on all outputs with non-sinusoidal waveshapes,
which are specified only at frequencies up to 100Hz if Option 200 (10- and 50-turn current
coils) is in use.
Increasing Frequency
Using the
key in Digit Edit facility; an audible warning will be given if the new value
is too large for the present span of frequencies, with a reminder ('Up range required') on
the screen. The user must change to the next lower resolution, with a larger span of
frequencies, using the
key. This rule applies whether OUTPUT is OFF or ON.
When using either the X10 screen key or the Direct Edit facility; if the new frequency is
too large for the present resolution, a lower resolution will be activated with a larger span
of frequencies. No warning will be given. This rule applies whether OUTPUT is OFF
or ON.
Decreasing Frequency
Using Digit Edit; frequencies down to 10Hz lie within all current spans. Any attempt to
set a frequency below 10Hz for these currents will not be enabled, and an audible warning
will be given, accompanied by a reminder ('
Minimum value') on the screen.
If the required frequency lies between steps of the present frequency resolution, then the
user must increase resolution using the
key (this also reduces the span of
frequencies). This rule applies whether OUTPUT is OFF or ON.
Using either the ÷10 screen key or Direct Editing; if the required frequency lies between
increments of the present resolution, a greater resolution will be activated with reduced
span. No warning will be given. This rule applies whether OUTPUT is OFF or ON.
'Out of range'
Refer to Sub-section 4.6.7.
Absolute Span of Frequencies Nominal
Resolution Frequency
1mHz 010.000 Hz to 320.000 Hz 300Hz
10mHz 0.01000 kHz to 3.20000 kHz 3kHz
100mHz 00.0100 kHz to 30.0000 kHz 30kHz
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