Tektronix RFM150, Инструкция по эксплуатации

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Making Measurements
2–28 RFM 150 Instruction Manual
Press the LEVEL key, then select METER. The meter measurement
screen, shown in Figure 2–12, will appear, with the instrument mode
(METER) displayed in the upper right corner of the screen. The level
readout (largest type size on screen) represents the detected energy
within the selected RBW filter, centered at the tuned frequency. The
offset value (representing probe loss) appears under the level readout,
and can be edited (refer to Probe Loss, page 3–19).
* Indicates amplitude
offset is applied (see
channel table)
REF
Outline indicates knob is assigned
to control reference level.
VOL 85%
KNOB
METER
Level reading
Chan 2 V
55.25 MHz
+45.0*
dBmV
(20)
5.0 MHz 537.5
+45.0
dBmV
1080.0
Offset = probe loss
Frequency
plot line
+35.0 +55.0
Y
Arrow cursor, showing
tuned frequency
30 kHz
RBW
PEAK
DETECT
Level
reading
V or A indicates visual
or aural carrier.
Dashed outline indicates knob
and keypad are uncoupled.
Figure 2–12: The meter mode display
The simulated analog meter displays the same value as the level
readout. The value can be read according to the meter’s numbered
scale. The following paragraph tells how to set the reference level for
this scale.
Reference level. Press F1 to assign the knob to REF (the label should
be outlined). Use the knob to set the reference level so that the level
readout (dark line) is within the central area of the meter scale, not
off either end of the scale.
Making Measurements
2–28 RFM 150 Instruction Manual
Press the LEVEL key, then select METER. The meter measurement
screen, shown in Figure 2–12, will appear, with the instrument mode
(METER) displayed in the upper right corner of the screen. The level
readout (largest type size on screen) represents the detected energy
within the selected RBW filter, centered at the tuned frequency. The
offset value (representing probe loss) appears under the level readout,
and can be edited (refer to Probe Loss, page 3–19).
* Indicates amplitude
offset is applied (see
channel table)
REF
Outline indicates knob is assigned
to control reference level.
VOL 85%
KNOB
METER
Level reading
Chan 2 V
55.25 MHz
+45.0*
dBmV
(20)
5.0 MHz 537.5
+45.0
dBmV
1080.0
Offset = probe loss
Frequency
plot line
+35.0 +55.0
Y
Arrow cursor, showing
tuned frequency
30 kHz
RBW
PEAK
DETECT
Level
reading
V or A indicates visual
or aural carrier.
Dashed outline indicates knob
and keypad are uncoupled.
Figure 2–12: The meter mode display
The simulated analog meter displays the same value as the level
readout. The value can be read according to the meter’s numbered
scale. The following paragraph tells how to set the reference level for
this scale.
Reference level. Press F1 to assign the knob to REF (the label should
be outlined). Use the knob to set the reference level so that the level
readout (dark line) is within the central area of the meter scale, not
off either end of the scale.