Table of Contents
Operation and Reference
DC Only
When the Main Function selections are disabled (all indicators extinguished), the HP 3325B
ai^omatically displays the DC Offset value and selects the [DC Offset] key for entry of DC
Unset values. Without an ac function selected, the dc voltage output ranges from
0 mV to ± Sy with four-digit resolution.
High Voltage Option
With the high voltage option enabled, the dc offset range is ±20 volts (ac + dc peak value or
dc only). DC offset with the high voltage option is dependent on the ac amplitude. With the
high voltage output (option 002) selected, the minimum and maximum permissible dc offset
voltages may be determined by multiplying the amplitude and offset values in table 1-7 (and
figure 1-2) by 4. The equation for determining maximum dc offset is:
Maximum dc Offset = (20 h-A) - (Amptd ^2)
Where A - Attenuator factor (from table 1-7)
Amptd = Amplitude in Vpp of the ac function.
When the high voltage output is selected, minimum amplitude for dc only (no ac
function),is 0.01 mV and maximum Is 20.0V.
Phase
The [Phase] key enables display, entry, or modification for the phase of the
Mam Signal. The indicator adjacent to [Phase] key illuminates when a
phase value is displayed. The displayed phase value is changed with the
entry keys and [Deg] (degrees) units key, or modified with the modify
controls. The phase display range is ±719.9° with a resolution of 0.1°. Phase
values of ±1440° entered with the entry keys are accepted and the value is
displayed modulo 720. For square wave frequencies below 25 kHz, phase
changes greater than 25° may result in a phase shift ±180° from the desired
amount.
After entering a phase shift, the new phase may be assigned the zero-phase
position; subsequent changes in phase are with reference to that value To '
assign zero phase, press the blue [Shift] key followed by [Asgn Zero 0] key.
Asgn Zero 0
Asgn Zero 9
The [Asgn Zero O] (Assign Zero phase) key assigns a reference of zero
degrees to the existing phase parameter of the Main Signal without
chan^ng the phase of the output waveforms. Subsequent changes in phase
are with respect to that value. The [Asgn Zero O] key is selected by pressing
the blue [Shift] key prior to the [Phase] key.
Table of Contents
