Giga-tronics 8650A Series, Руководство по эксплуатации

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Series 8650A Universal Power Meters
2-2 Manual 31470, Rev. E, April 2001
Dedicated Hardkeys
The dedicated hardkeys are located on the right side of the front panel and function as described below.
In this manual, instructions to press a dedicated hardkey are with the appropriate key title in bold
uppercase enclosed in brackets, such as ‘press
[CAL/ZERO]
to calibrate a power sensor’.
Cursor Keys:
These four keys are arranged in a diamond pattern and move the highlighted item (cursor) in the
display to the desired location. A small diamond symbolizing the cursor keys appears in menus, with
an arrow in the keys that are effective for that menu. If more than one field is highlighted, the cur-
sor pattern will be located nearest the one that will be activated when the cursor keys are pressed.
CAL/ZERO:
This key is for zeroing and calibration of a power sensor. All active sensors should be zeroed when-
ever any sensor is added or removed, whether it is calibrated or not.
FREQ:
This key specifies the frequency of an input signal so that the power meter can apply the frequency-
specific cal factor from the sensor EEPROM to the measurement.
If the frequency of the input signal changes so often that it is impractical to keep entering the fre-
quency with the FREQ key, the frequency information can be conveyed to the 8650A by the use of
a voltage input that is proportional to frequency (see the V
PROP
F connector on the rear panel).
When the 8650A is controlled remotely over the GPIB, the frequency information can be sent over
the bus.
HELP:
Help screens describe the current display and present your options. From any menu, press
[HELP]
to display the associated Help screen. Press the up or down cursor key, if shown, to scroll the help
screen up or down one line at a time. Press [
Exit Help ] to leave the Help screen and return to the
current menu.
Power:
This push-push switch turns main power on and off. The LED above the power switch will be green
when the unit is ON, and will turn yellow indicating the standby mode when the power switch is
OFF with the main ac power still connected. The LED will be OFF when the ac power is discon-
nected. All user setting and sensor calibrations will be automatically stored in non-volatile memory
for recall when ac power is turned off with the front panel on/off switch.
To avoid losing some current settings and ensuring that the meter
powers up properly, observe the following procedures:
1.) Remove AC Power to the rear panel only after at least 1 second has lapsed from the time the
front panel ON/OFF switch has been pressed to turn off the meter.
CAUTION