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Description and Basic Operation of the SDA-5500 and 5510: User Interface Elements

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Fig. 13-2 The Eight Measurement Mode Keys

• LEVEL: Signal level measurements on individual channels are made by

entering a specific channel number and pressing the channel key.

Measurements can also be made by selecting the carrier with a marker

in the Scan mode and pressing the Level key.

• TILT: The Tilt mode simplifies the balancing of pilot levels by displaying

a bar graph with a representation of up to nine different user selected

video carrier levels.

• SCAN: Use the Scan mode to get a good look at absolute carrier levels.

This mode displays a bar graph showing all carrier levels.

• SWEEP (SDA-5500): Sweep mode injects a low level signal in vacant

spectrum areas, and transmits telemetry to any SDA-5000 field units that

are connected to the system. Cable system carrier levels in occupied

spectrum areas are monitored and displayed in bar graph format.

• SWEEP (SDA-5510): Sweep mode monitors the signals injected into

vacant spectrum areas by the field units. Also, through telemetry, this

mode transmits to connected receivers in the field the current condition

of noise and ingress.

NOTE: Telemetry occurs only while the unit is in Sweep

mode. Selecting another mode will result in a loss of

telemetry to any Receivers connected to the system.

• C/N: Measures and displays the C/N (carrier to noise) ratio of the tuned

channel or frequency.

• HUM: Measures the hum modulation of the tuned channel. It displays

the results in either % or dB as selected by the operator.

• MOD: Allows the user to listen to the modulation of the tuned channel or

frequency and measure a video carrier's depth of modulation.

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Wavetek 147 Especificaciones Pagina 243