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Making Measurements
2–44
RFM 150 Instruction Manual
Centering the trace.
If the trace is off-screen, an arrow next to the
CENTER LVL readout (upper left corner of the screen) indicates the
direction of the trace position (see Figure 2–20).
Selecting KNOB–LVL assigns the knob to control the center level in
1 dB steps. This will effectively move the trace up and down on the
screen. The CENTER LVL readout value will indicate the new
center screen reference value.
Selecting LVL/REF MENU, then CENTER TRACE will center the
trace on screen, and adjust the center level accordingly.
Vertical resolution.
The resolution can be set to 1 dB or 2 dB per
division. Select LVL/REF MENU, then select 2 dB/ or 1 dB/. The
present setting is indicated below the instrument mode in the upper
right corner of the display. See Figure 2–21.
CENTER LVL: +0 DB
SWEEP
VERT
2 dB/div
REFERENCE: HEADEND
CENTER
TRACE
2 dB/
1 dB/
REF
MENU
M1: 139.25 MHz
+95.3 dBuV
M2: 409.25 MHz
+88.3 dBuV
Outline
shows that
marker 1
is active.
Marker 1
frequency
Level
reading
Marker 2
frequency
Level
reading
Active sweep reference
Vertical
resolution
Press to enter the reference menu.
Outline shows that
2 dB/div is selected.
Figure 2–21: The sweep LVL/REF submenu display
Store a sweep reference.
The results of ‘all channel’ measurements
are used for the sweep references. For example, you can store an all
channel mode record at the head end, and use it as a reference for
field measurements.
Making Measurements
2–44
RFM 150 Instruction Manual
Centering the trace.
If the trace is off-screen, an arrow next to the
CENTER LVL readout (upper left corner of the screen) indicates the
direction of the trace position (see Figure 2–20).
Selecting KNOB–LVL assigns the knob to control the center level in
1 dB steps. This will effectively move the trace up and down on the
screen. The CENTER LVL readout value will indicate the new
center screen reference value.
Selecting LVL/REF MENU, then CENTER TRACE will center the
trace on screen, and adjust the center level accordingly.
Vertical resolution.
The resolution can be set to 1 dB or 2 dB per
division. Select LVL/REF MENU, then select 2 dB/ or 1 dB/. The
present setting is indicated below the instrument mode in the upper
right corner of the display. See Figure 2–21.
CENTER LVL: +0 DB
SWEEP
VERT
2 dB/div
REFERENCE: HEADEND
CENTER
TRACE
2 dB/
1 dB/
REF
MENU
M1: 139.25 MHz
+95.3 dBuV
M2: 409.25 MHz
+88.3 dBuV
Outline
shows that
marker 1
is active.
Marker 1
frequency
Level
reading
Marker 2
frequency
Level
reading
Active sweep reference
Vertical
resolution
Press to enter the reference menu.
Outline shows that
2 dB/div is selected.
Figure 2–21: The sweep LVL/REF submenu display
Store a sweep reference.
The results of ‘all channel’ measurements
are used for the sweep references. For example, you can store an all
channel mode record at the head end, and use it as a reference for
field measurements.
Содержание RFM150
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Страница 14: ...Table of Contents x RFM150 Instruction Manual Table of Contents x RFM150 Instruction Manual...
Страница 21: ...Getting Started Getting Started...
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Страница 45: ...Operating Basics Operating Basics...
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Страница 60: ...Functional Overview 2 14 RFM150 Instruction Manual Functional Overview 2 14 RFM150 Instruction Manual...
Страница 92: ...Making Measurements 2 46 RFM150 Instruction Manual Making Measurements 2 46 RFM150 Instruction Manual...
Страница 93: ...Reference Reference...
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Страница 123: ...Specifications Specifications...
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Страница 134: ...Specifications 4 10 RFM150 Instruction Manual Specifications 4 10 RFM150 Instruction Manual...
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Страница 137: ...Performance Check Performance Check...
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Страница 151: ...Maintenance Maintenance...
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Страница 170: ...Replacement Procedures 6 18 RFM150 Instruction Manual Replacement Procedures 6 18 RFM150 Instruction Manual...
Страница 172: ...Recharging the Battery 6 20 RFM150 Instruction Manual Recharging the Battery 6 20 RFM150 Instruction Manual...
Страница 177: ...Replaceable Electrical Parts Replaceable Electrical Parts...
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Страница 184: ...Replaceable Electrical Parts 7 6 RFM 150 Instruction Manual Replaceable Electrical Parts 7 6 RFM 150 Instruction Manual...
Страница 185: ...Replaceable Mechanical Parts Replaceable Mechanical Parts...
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Страница 197: ...Appendices Appendices...
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Страница 200: ...Appendix A Channel Tables RFM150 Instruction Manual A 2 Appendix A Channel Tables RFM150 Instruction Manual A 2...
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Страница 238: ...Appendix A Channel Tables RFM150 Instruction Manual A 40 Appendix A Channel Tables RFM150 Instruction Manual A 40...
Страница 242: ...Appendix A Channel Tables RFM150 Instruction Manual A 44 Appendix A Channel Tables RFM150 Instruction Manual A 44...
Страница 269: ...Index Index...
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