Tektronix RFM150, Instruction Manual

Page: 35 / 278

Tutorial
RFM 150 Instruction Manual 1–13
correct character(s). To cancel the entry entirely, press F5
(ABORT ENTRY). After the reference name is entered, press
ESC twice.
2. Center the trace. If the trace is off screen vertically, an arrow will
appear next to the CENTER TRACE readout, indicating the
direction of the trace.
If the trace is off screen or is not well centered vertically, use one
of the two following methods to center the trace:
H
To adjust the center level, press F1 (LVL), then turn the knob
to adjust the center level in 1 dB steps. This will move the
trace up and down on the screen.
H
To center the trace and adjust the center level automatically,
press F3 (LVL/REF MENU), followed by F1 (CENTER
TRACE).
3. View the SWEEP display as follows:
a. Refer to the sample display shown in Figure 1–1.
b. The display plots the difference between the sweep reference
and the present signal, with the horizontal axis representing
frequency and the vertical axis representing amplitude. Each
horizontal line (division) on screen represents 1 dB or 2 dB of
amplitude, depending on the vertical resolution setting.
4. Set the vertical resolution as follows:
a. Press F3 (LVL/REF MENU). In this submenu, F2 and F3
control the vertical resolution. The present setting is outlined
just above the F2 or F3 key, and is also noted in the upper
right corner of the screen.
b. Press F2 or F3 to change the setting, and note the difference in
the display. Set the vertical resolution as desired, then press
ESC.
5. Use the markers to read amplitude as follows:
a. Press F2 until MKR1 is displayed on-screen above the F2 key.
This selects MKR1 as the active marker, and assigns the knob
to tune the marker frequency.
Tutorial
RFM 150 Instruction Manual 1–13
correct character(s). To cancel the entry entirely, press F5
(ABORT ENTRY). After the reference name is entered, press
ESC twice.
2. Center the trace. If the trace is off screen vertically, an arrow will
appear next to the CENTER TRACE readout, indicating the
direction of the trace.
If the trace is off screen or is not well centered vertically, use one
of the two following methods to center the trace:
H
To adjust the center level, press F1 (LVL), then turn the knob
to adjust the center level in 1 dB steps. This will move the
trace up and down on the screen.
H
To center the trace and adjust the center level automatically,
press F3 (LVL/REF MENU), followed by F1 (CENTER
TRACE).
3. View the SWEEP display as follows:
a. Refer to the sample display shown in Figure 1–1.
b. The display plots the difference between the sweep reference
and the present signal, with the horizontal axis representing
frequency and the vertical axis representing amplitude. Each
horizontal line (division) on screen represents 1 dB or 2 dB of
amplitude, depending on the vertical resolution setting.
4. Set the vertical resolution as follows:
a. Press F3 (LVL/REF MENU). In this submenu, F2 and F3
control the vertical resolution. The present setting is outlined
just above the F2 or F3 key, and is also noted in the upper
right corner of the screen.
b. Press F2 or F3 to change the setting, and note the difference in
the display. Set the vertical resolution as desired, then press
ESC.
5. Use the markers to read amplitude as follows:
a. Press F2 until MKR1 is displayed on-screen above the F2 key.
This selects MKR1 as the active marker, and assigns the knob
to tune the marker frequency.