Tektronix RFM150, Инструкция по эксплуатации

Страница: 86 / 278

Making Measurements
2–40 RFM 150 Instruction Manual
Table 2–10: Functions of active keys in spectrum mode (continued)
Key Action
CHAN Terminates keypad entry as channel. Switches to channel entry mode.
MHz Terminates keypad entry as frequency. Switches to frequency entry
mode.
ENTER Terminates a keypad entry in the active entry mode (chan. or freq.).
Pressing backspace during a keypad entry erases the character
preceding the cursor. Backspacing 1 click after field is empty aborts
partial entry.
HELP Displays context-sensitive help screen; aborts a partial keypad entry.
ESC Exits the submenu or menu, one level at a time. Aborts a partial keypad
entry without changing the instrument setup.
Center frequency. If the knob is assigned to REF, MKR, or SPAN, the
keypad controls center frequency. If the knob is not assigned to REF,
MKR, or SPAN, then both the knob and the keypad control center
frequency. Deselect knob assignments by pressing CHAN or MHz
(without a keypad entry), or by pressing the current assignment
again. For example, with KNOB REF selected, press F1 to deselect it
and set the knob to control center frequency.
Span/division. The span/div (displayed above the measurement area)
is controlled, in a 1-2-4 sequence, by selecting KNOB SPAN, then
turning the knob. Minimum span is 200kHz/div; maximum is
4 MHz/div (300 kHz RBW), or 400 kHz/div (30 kHz RBW).
Resolution bandwidth.
Pressing F4 toggles the resolution bandwidth
between 30 kHz and 300 kHz.
Reference level.
The REF level is the level at the top of the screen.
The present setting is displayed in the upper left corner of the screen.
It can be changed by selecting KNOB REF and turning the knob.
Detection. Pressing F5 toggles between peak and average detection.
Making Measurements
2–40 RFM 150 Instruction Manual
Table 2–10: Functions of active keys in spectrum mode (continued)
Key Action
CHAN Terminates keypad entry as channel. Switches to channel entry mode.
MHz Terminates keypad entry as frequency. Switches to frequency entry
mode.
ENTER Terminates a keypad entry in the active entry mode (chan. or freq.).
Pressing backspace during a keypad entry erases the character
preceding the cursor. Backspacing 1 click after field is empty aborts
partial entry.
HELP Displays context-sensitive help screen; aborts a partial keypad entry.
ESC Exits the submenu or menu, one level at a time. Aborts a partial keypad
entry without changing the instrument setup.
Center frequency. If the knob is assigned to REF, MKR, or SPAN, the
keypad controls center frequency. If the knob is not assigned to REF,
MKR, or SPAN, then both the knob and the keypad control center
frequency. Deselect knob assignments by pressing CHAN or MHz
(without a keypad entry), or by pressing the current assignment
again. For example, with KNOB REF selected, press F1 to deselect it
and set the knob to control center frequency.
Span/division. The span/div (displayed above the measurement area)
is controlled, in a 1-2-4 sequence, by selecting KNOB SPAN, then
turning the knob. Minimum span is 200kHz/div; maximum is
4 MHz/div (300 kHz RBW), or 400 kHz/div (30 kHz RBW).
Resolution bandwidth.
Pressing F4 toggles the resolution bandwidth
between 30 kHz and 300 kHz.
Reference level.
The REF level is the level at the top of the screen.
The present setting is displayed in the upper left corner of the screen.
It can be changed by selecting KNOB REF and turning the knob.
Detection. Pressing F5 toggles between peak and average detection.