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8600 Operation Manual - V1.0
Low Frequency Variable Output - Variable Sine
Pressing the LF Mode key again will set the unit to
DDS Sine Wave Output Mode
. In this
mode the frequency can be varied from 10 Hz to 2 MHz in 1 Hz steps. The output is a variable level
sine wave that can be configured for output into either a 1 MOhm input impedance or a 50 Ohm input
impedance.
In this mode the Main Display will indicate the current output frequency, followed by
either “Int” or “GPS”. A display of “GPS” indicates that the unit is currently disciplined to GPS, a
display of “Int” means that a fix has not been achieved. The smaller status display will indicate
DDS
Variable Sine
and the currently configured output impedance.
The output is varied using the digital control, rotating clockwise to INCREASE the frequency,
and anti-clockwise to DECREASE the frequency.
Direct digit entry is also possible using the numerical section of the keyboard, followed by
pressing the ENTER key.
To vary the level, press the LEVEL key and then observe the current output on the smaller
screen. The default in both output impedance modes is 1V. The output voltage is displayed as the RMS
level. The output can be varied either with the digital control or through direct numerical entry.
Note : Outputs below 0.26V will be displayed in mV, outputs above will be displayed in V.
To change the output impedance, press the SHIFT key followed by the LEVEL key. The status
display will update to indicate either
Hi Impd Output
or
50Ω Impd Output
.
The output for this function appears at the LF Source A Terminal
