17-11.1 ASTRO BER Meter
Mon Freq
Display of the actual monitored frequency.
Dev
Display of the frequency deviation in kHz.
Freq Err
The acquisition frequency error range is +
1500
Hz as described for the RF Display.
Input Lvl
Displays the signal level received at the
selected front panel connector. A single cursor
field at this location allows selection by
softkey of either microvolts/watt or dBm units
of display.
Errs
Display of the bit error count detected during
the test.
Bits
Display of the bit count during the test.
BER
Display of the ratio of bit errors to bit count
determined during the test. BER is displayed as
an exponent. The BER for one error in one
thousand bits is 0.001E01.
NOTE
BER Meter measurement is accurate up to 20
percent bit errors.
17-11.1.1 Enabling the BER Test
The BER test begins when BER m
eter is selected
in the Display Zone "Meter:" field.
17-11.1.2 Resetting the BER Test
To reset the BER test, move cursor to the
"Meter:" field in the Display Zone and press
more until reset is displayed. Press reset and the
BER count is started over from zero.
17-11.2 CLEAR SCOPE Display
The CLEAR SCOPE display shows either the
received audio signal after it has been converted
to analog or the analog transm
it signal before it is
digitized. To activate the CLEAR SCOPE, place
the analyzer in ASTRO mode.
The selection of either MONITOR or
GENERATE in the RF Zone determines which
signal will be displayed on the screen. Press the
DISP hardkey, place the cursor on "Display:"
field, and select the CLEAR SCOPE softkey. The
Display area of the screen will indicate CLEAR
SCOPE with the input signal displayed in a
time-versus-amplitude graph.
The operator can adjust the horizontal scale by
placing the cursor on "Horiz:" field and selecting
the appropriate value from the softkey selections.
To change the vertical scale, go to the "Vert:"
field and select the appropriate value for the
softkey selections. Figure 17-18 shows the
display, cursor and associated softkey used for
the CLEAR SCOPE
17-11.2.1 Monitor Mode
In Monitor mode, the CLEAR SCOPE display
shows the recovered analog audio signal. The
CLEAR SCOPE operational controls are similar
to the Standard version MOD SCOPE with the
following differences in vertical scale.
10 mV/div 1 V/div
20 mV/div 2 V/div
50 mV/div 5 V/div
100 mV/div 10 V/div
200 mV/div
500 mV/div
To change horizontal position, horizontal range,
vertical position, or vertical range, use the cursor
control keys to highlight the appropriate cursor
fields as follows:
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