RF Control:
Preset: - - B/W: NB
GENERATE
Freq:
Output Level:
-112 dB
816.5000 MHz
Mon RF In: RF I/O
Receiver
Frequency
NOTE
For setup and distortion measurements, set the
output level to at least 30 dB above the
sensitivity threshold (-80 dBm recommended).
3. Use the CURSOR ZONE keys to move the
cursor to the Audio Zone. Within the Audio
Zone, move the cursor to Fixed 1 kHz
controls field. Select 1 kHz audio source as
the modulating signal (also available from
the MOD OUT connector on the front
panel) by turning 1 kHz on "~". Set 1 kHz
voltage level to 0.4 volt.
4. Turn on the ASTRO receiver and tune
receiver and analyzer to the same
frequency. Verify receiver locks onto test
signal.
5. Use the CURSOR ZONE keys on analyzer
front panel and move the cursor to the
Display Zone.
6. Place cursor in the "Display:" field and
press CLEAR SCOPE softkey. The CLEAR
SCOPE screen should appear similar to
figure 18-4.
7. Move the cursor to "Horiz:" field and press
200 us softkey.
8. Move the cursor to "Vert:" field and press
200 mv
softkey.
9. Move the cursor to "Vert Position:" field.
Use move up/move down softkeys or rotary
control to position the modulating 1 kHz
waveform on a convenient graticule.
10. Move the cursor to "Horiz Position:" field.
Use move left/move right softkeys or rotary
control to position the modulating 1 kHz
waveform on a convenient graticule.
11. Move the cursor to "Mrk:" field.
Press V softkey to display movable
markers that measure voltage
differential (Vp-p).
Press T softkey to display movable
markers that measure time differential
(sec).
Press 1/T softkey to display movable
markers that measure reciprocal time
differential (in Hz).
12. Position the markers as desired using
TUNING knob (press toggle marker softkey
to select marker). The movable marker is
indicated by a dashed line. Observe digital
readout of marked values below "Mrk:"
field.
251
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