Holland Electronics ST-5128S - Manual (Page 18)

17
Operation
1. Using the numeric keypad, enter the number of the channel to be measured,
and then press then CH key. Or, press the low, mid or top soft key to select a
starting channel from the standard channel list, and then scroll to the desired
channel using the 
keys.
2. Press the F4 (ESC) soft key to exit to the sub-menu of the single channel
measurement screen.
C/N Measurement range and Accuracy: (Please refer to the fig.9 graph below.)
1. The x-coordinate is the Power Level of the Signal. The Y-coordinates are
the value of C/N measurement. The tolerance of the measurement can be
determined by the intersect points X-Y coordinate.
2. The reliable area is located on the shaded area as shown on the graph.
3. If the C/N value shows the out “

“ sign, this indicates that the C/N value
that was measured is smaller or greater than the meter’s sensitivity.
55
50
40
30
20
10
0
60 70 75 80 85 90
Fig. 9
C/N Differential measurement range and accuracy
Reliable
measurement Area
Range: ±4dB