Fluke Calibration 5730A, Руководство оператора, Страница: 93 / 260

Front-Panel Operation
Variable Phase Output
4
4-29
11. Push

. The Calibrator clears the entry from the entry bar toward the bottom
and displays in the larger area above. No voltage is available at the WIDEBAND
Type “N” coaxial connector until

is pushed.
12. Push

to activate the Calibrator output. The UUT will now respond to the
applied voltage.
Note
To deactivate the Wideband AC Module and switch to another output
function, touch
Wideband again. When sourcing an ac voltage or dBm
level within the range of the standard ac voltage output mode, that value is
selected. Otherwise, the Display reads 0 mV (dc).When using units of dBm
and switching between wideband and standard ac voltage output, the
amplitude changes. This change occurs because for the wideband function,
decibel levels are computed for a 50
Ω
load, and for the standard ac
function, decibel levels are computed for a 600
Ω
load.
Variable Phase Output
A variable-phase signal of nominally 2.5 V rms is available at the rear panel BNC
connector labeled VARIABLE PHASE OUT when sourcing ac volts, wideband voltage,
or ac current outputs. The phase of this signal with respect to the main output signal is
continuously adjustable from -180º to +180º in 1º increments. The rotary knob, numeric
keypad, and selections adjust the phase of this signal, after calling up the phase controls
as described below. The display shows the phase of the phase output signal as a number
and a cursor on a linear scale graduated in 90º steps from -180º to +180º.
To set and adjust a phase output:
1. Set an ac voltage or current output as described under “AC Voltage Output” or “AC
Current Output.”
2. Touch the + icon on the right of the display above the bottom row of selections to
expose the phase controls.
3. Touch Phase Control . This exposes the phase entry window.
4. To turn phase shift output on, touch the checkbox.