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4-8-1
GENERAL
Table 4-9 lists the front panel controls which are used in the Oscillo-
scope function of the FM/AM-1200S/A.
For oscilloscope operation, the
HORIZONTAL Sweep Selector Control (26) must be in "mS/Div" or "11S!DIV"
position.
The VERTICAL Attenuator Selector Control (24) "kHz/%X10"
position is for internal demodulated audio and ''V/Div'' position is for
external scope inputs.
All other controls are similar to those found on
most conventional oscilloscopes.
4-8-2
EXTERNAL OSCILLOSCOPE OPERATION
The FM/AM-1200S/A Oscilloscope is a general purpose DC to 1 MHz band-
width single trace oscilloscope with automatic triggering.
Any external
input to the scope must be applied at the front panel SCOPE/DVM
Connector (20).
STEP
PROCEDURE
------------------------------------------------------------------------
1.
Place the FM/AM-1200S/A front panel controls to the settings
listed in Table 4-9.
2.
Connect TONE OUT Connector
(17)
to SCOPE/DVM Connector (20).
3.
Turn 1 kHz TONE Selector Switch
(7)
to "INTL'' position.
4.
Adjust 1 kHz TONE LEVEL Control
(8)
for a viewed sine wave on
CRT Display (31).
[NOTE\
When AC/GND/DC Switch (21) is in ''GND''
position, the external input is removed from
the Oscilloscope.
4-8-3
INTERNAL OSCILLOSCOPE OPERATION
The VERTICAL Attenuator Selector Control (24) must be in one of the four
"kHz/%X10'' positions for internal oscilloscope operation.
STI~------------------------------~~Q~IQ~~I
____________________________ _
1.
Place the FM/AM-1200S/A front panel controls to the settings
listed in Table 4-9.
2.
Set Vertical Attenuator Selector Control (241 to "2 kHz/%X10"
position.
3.
Set FM/AM-1200S/A controls for
5
kHz FM deviation.
(Ref.
paragraph 4-6, RF Signal Generation Operation (Simplex).)
4.
The CRT now displays
(+)
and (-)
5
kHz deviation.
4-45
05
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