Wavetek 3HRV Especificações descarregar pdf (Página 42)

4-19

Frequency Tuning Step Size

The Tuning Step Size can be adjusted using the UP and DOWN

arrow keys or the numeric entry keys (0.01 to 100.00 MHz in 10 kHz

steps).

Fundamental Hum Frequency

The fundamental hum frequency to be measured can be selected

using the

UP and DOWN arrow keys (60 Hz, 50 Hz, Auto). When

Auto is selected the unit will automatically switch to 50 Hz on PAL

type plans and 60 Hz for NTSC plans.

Scan Rate

Two scan rates are available in the Scan mode, normal and fast. The

scan rate is selected using the

UP and DOWN arrow keys. The Fast

scan feature allows for rapid scan displays, while sacrificing accuracy.

Normal scan rate is slower, but more accurate.

Scan Audio Carriers

If desired, the audio carriers can be omitted resulting in a faster scan.

This feature is selected using the

UP and DOWN arrow keys (yes,

no).

C/N Calibration

To increase the accuracy of the C/N measurements, a noise floor

calibration is performed. This allows the user to characterize the

noise floor of the unit. To perform the calibration, highlight the

selection and press the ENTER key. The unit will provide a prompt

to ensure that no cable is connected to the RF input. Once verified,

press the OK soft key to perform the calibration. The unit will

display the system noise level when the calibration is complete.

4.3.3 How To Setup Your Channel Plan

The procedure explained in Section 4.2.2 should be performed when

first using the Model 3HRV.

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Wavetek 3HRV Especificações Página 42