Tektronix RFM150, Instruction Manual

Page: 72 / 278

Making Measurements
2–26 RFM 150 Instruction Manual
Markers.
The two marker readouts, located in the bottom corners of
the measurement display, show the frequency setting of each marker
and the signal level reading in the current power units (dBmV or
dBuV) at that frequency. No level reading will be given for channels
that are set to SKIP through the channel table menu, although the
marker can be moved to a skipped channel.
If the level reading is replaced by OVER, the reference level should
be increased. The difference between the levels at the two marker
frequencies appears in the lower right portion of the screen.
If F1 is pressed and its on-screen label (REF) is highlighted, the knob
controls the reference level, but the keypad can be used to enter the
active marker frequency. 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.
Keypad entries must be followed by CHAN for channel entries, or
MHz or ENTER for frequency entries. (In this application, ENTER
is equivalent to MHz.) Tuning is limited to frequencies that
correspond to channels in the active channel table. If another
frequency is attempted, an error message will be displayed, and the
tuning will not be changed.
Exit. To change to another menu, press the new menu key. Pressing
certain menu keys will reassign the function keys while leaving the
meter mode display on screen (for example, pressing STORE to store
a measurement result). Press ESC to exit the other menu and restore
the all channel mode function keys. To change to another level
measurement mode, press LEVEL. If 1 channel or meter mode is
entered following all channel mode, the instrument will be tuned to
the same frequency as the active marker.
Making Measurements
2–26 RFM 150 Instruction Manual
Markers.
The two marker readouts, located in the bottom corners of
the measurement display, show the frequency setting of each marker
and the signal level reading in the current power units (dBmV or
dBuV) at that frequency. No level reading will be given for channels
that are set to SKIP through the channel table menu, although the
marker can be moved to a skipped channel.
If the level reading is replaced by OVER, the reference level should
be increased. The difference between the levels at the two marker
frequencies appears in the lower right portion of the screen.
If F1 is pressed and its on-screen label (REF) is highlighted, the knob
controls the reference level, but the keypad can be used to enter the
active marker frequency. 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.
Keypad entries must be followed by CHAN for channel entries, or
MHz or ENTER for frequency entries. (In this application, ENTER
is equivalent to MHz.) Tuning is limited to frequencies that
correspond to channels in the active channel table. If another
frequency is attempted, an error message will be displayed, and the
tuning will not be changed.
Exit. To change to another menu, press the new menu key. Pressing
certain menu keys will reassign the function keys while leaving the
meter mode display on screen (for example, pressing STORE to store
a measurement result). Press ESC to exit the other menu and restore
the all channel mode function keys. To change to another level
measurement mode, press LEVEL. If 1 channel or meter mode is
entered following all channel mode, the instrument will be tuned to
the same frequency as the active marker.