6. Place cursor in the "Display:" field and
press
CLEAR SCOPE softkey. The
CLEAR SCOPE screen should appear
similar to figure 18-5.
No waveform is present until the
transmitter is turned on.
7. Turn on the ASTRO radio and press PTT.
CAUTION
The analyzer's built-in RF load dissipates
up to 50 W for three minutes and up to
125 W for one minute. If a high-power
transmitter is keyed into the analyzer for a
time long enough to threaten overheating
the power measuring circuitry, the
analyzer's audible alarm sounds and the
display changes to the RF LOAD
OVERTEMPERATURE warning, signaling
t
8. oriz:" field and
9. "Vert:" field and select
10.
aveform on a convenient
graticule.
he operator to unkey.
Move the cursor to "H
select the desired scale.
Move the cursor to
the desired scale.
Move the cursor to "Vert Position:" field.
Use move up/move down softkeys or
rotary control to position the recovered
audio w
11. Move the cursor to "Horiz Position:" field.
Use move left/move right softkeys or
rotary control to position the recovered
audio waveform on a convenient
graticule.
12. Move the cursor to "Mrk:" field.
13. Press V softkey to display movable
markers that measure voltage differential
(Vp-p).
14. Press T softkey to display movable
markers that measure time differential
(sec).
15. Press 1/T softkey to display movable
markers that measure reciprocal time
differential (in Hz).
16. 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.
249
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