Dr.HD F15 - Page 9

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6.1 Getting Started

The bars height indicates the LNB input mode of the receiver. High values (close to 255)

show that input signal is suppressed by the attenuator at high degree and input signal

overload can occur. Low values (close to 0) show the maximum boost of the input signal.

Noise level may highly interfere with the input signal in this case. The best quality signal is

normally displayed in the upper part of the graph and does not exceed the limits.

Adding new transponders

Zoom function is used for detailed display of the histogram. It allows locate transponders

which are not in the preset list, set the expected frequency range and then add those

transponders by “Blind Scan” to the list. Moreover, many well known satellites can be

recognized by their spectrum shape.

Fine tuning of the dish position

Zoom function allows the fine tuning of the dish position. To set the dish position very

precisely the part of the spectrum can be zoomed in. For example, you can display

spectrum only within level 50~255 if LNB cable is short and the spectrum is located in the

upper part of the graph. On the contrary, if the signal is low you can set upper limit to 150 or

100 to see more detailed picture of the spectrum.

6.1 Getting Started

SPECTRUM ANALYSER

General information

The spectrum is displayed as histogram. YELLOW bars indicate signal presence. BLUE bars

indicate signal presence and transponder presence of the selected satellite. RED bars

indicate the frequency of the selected transponder. GREEN bars indicate the locked

frequencies.

Press “LOCK” YELLOW button to verify all the transponders indicated by all the BLUE bars

visible in the active window: whether the transponders are locked or not. The transponder

which is under checking is displayed above the histogram. Here you can see ratio: locked

transponders / all transponders. Press YELLOW button again to cancel verify mode. This

function mainly used for testing transponders’ signal

In spectrum analyzer mode you can switch LNB mode quickly. Press GREEN button to

change polarization, press RED button to switch between high and low frequency ranges.

Selected LNB mode is displayed above the histogram. Frequency bar width (in MHz) is

displayed above the histogram too. Minimum and maximum frequency limits are shown at

the horizontal axis of the graph.

<Three new transponders (no blue bars under the

three “bells”) can be added by “blind scan” to preset

list (12 500 ~ 12 700 MHz, vertical polarization)>