21-9.3.2 Generate Mode
The analyzer generates a 1011 Hz Tone Test
pattern when Generate mode is selected in the RF
Zone and the 1011 Hz Tone Test pattern is
selected for the “Code:” field in the Audio Zone.
When code 1011 Hz Tone Test pattern is selected
in the Audio Zone (Figure 21-16), the analyzer
modulates the 1011 Hz Tone Test pattern on the
carrier at either of two output ports:
RF I/O port, or
GEN OUT port
Both deviation level control and a deviation
switch are provided in the Audio Zone for
deviation control of the generated signal.
The deviation level “PRJ25 Dev:” can be set by
either the keypad or the TUNING knob to enter
the desired deviation. The deviation range varies
depending on whether the bandwidth (in the RF
Zone) is set to narrow or wide.
BW Setting Deviation Range
Narrow 0.50 to 5.00 kHz maximum, in
0.05 kHz increments
Wide 05.0 to 50.0 kHz maximum, in
0.50 kHz increments
The deviation switch with values of Off and
Continuous is located to the right of the deviation
level control field. Move the cursor to the switch
field and turn deviation on “~” or off “X” using the
softkeys.
The generated 1011 Hz Tone Test pattern can be
used to measure the received BER of the radio
under test. If the 1011 Hz Tone Test pattern is
received without error, the BER detected by the
unit under test will be zero. These measurements
will only be possible for radios that are capable
of computing a BER when the received signal is
compared with a stored 1011 Hz Tone Test
pattern and having the necessary radio test mode
software.
Figure 21-15. PROJ 25 CONV Audio Zone - BER Generate Mode
273
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