Tektronix RFM150, Инструкция по эксплуатации

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Making Measurements
RFM 150 Instruction Manual 2–43
Table 2–11: Functions of active keys in sweep display 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.
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.
Markers.
The sweep display has two tunable frequency markers.
Readouts in the lower portion of the measurement screen show the
marker 1 and marker 2 frequencies and the level (in dB) at those
frequencies. Additionally, a readout in the lower right corner of the
screen shows the difference between the markers and a peak-to-
valley readout.
If F1 is pressed and its on-screen label (LVL) is highlighted, the
keypad can be used to enter the active marker frequency, but the
knob controls the center level. To change the knob action to marker
frequency, press F2. The knob and keypad are now coupled, both
controlling marker frequency. Pressing F2 again selects the active
marker (toggles between 1 and 2). The on-screen label reflects the
active marker name (MKR1 or MKR2), and an outline appears
around the active marker readout. Marker 1 appears on screen as a
solid line, and marker 2 is a dashed line.
A marker can be tuned only while it is active. Tune with the knob or
by a keypad entry terminated with CHAN for channel and MHz or
ENTER for frequency. Tuning is limited to frequencies that
correspond to channels in the instrument’s channel tables. Entering
other frequencies will cause an error message, leaving the marker
frequency unchanged. The inactive marker is the boundary for tuning
the active marker; the active marker cannot cross the inactive
marker.
Making Measurements
RFM 150 Instruction Manual 2–43
Table 2–11: Functions of active keys in sweep display 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.
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.
Markers.
The sweep display has two tunable frequency markers.
Readouts in the lower portion of the measurement screen show the
marker 1 and marker 2 frequencies and the level (in dB) at those
frequencies. Additionally, a readout in the lower right corner of the
screen shows the difference between the markers and a peak-to-
valley readout.
If F1 is pressed and its on-screen label (LVL) is highlighted, the
keypad can be used to enter the active marker frequency, but the
knob controls the center level. To change the knob action to marker
frequency, press F2. The knob and keypad are now coupled, both
controlling marker frequency. Pressing F2 again selects the active
marker (toggles between 1 and 2). The on-screen label reflects the
active marker name (MKR1 or MKR2), and an outline appears
around the active marker readout. Marker 1 appears on screen as a
solid line, and marker 2 is a dashed line.
A marker can be tuned only while it is active. Tune with the knob or
by a keypad entry terminated with CHAN for channel and MHz or
ENTER for frequency. Tuning is limited to frequencies that
correspond to channels in the instrument’s channel tables. Entering
other frequencies will cause an error message, leaving the marker
frequency unchanged. The inactive marker is the boundary for tuning
the active marker; the active marker cannot cross the inactive
marker.