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When any of the following special functions
are selected, the normal operating screens
will flash a warning SPF Enabled at the lower
right of the screen. This serves as a reminder
since special functions inadvertently left
enabled can adversely effect normal operation
of the unit.
SPF Reset
This softkey appears throughout the Special
Function screen as a convenience in resetting of
all special functions from System Functions
through Low Pass Filter to the factory standard
state. This will switch all decoding to internal
and provide the widest filter bandwidth.
Enable/Disable Generate Mode Speaker
Provides the means to disable the internal
speaker during generate mode.
Enable/Disable Sinad Audio
Permits the routing of the signal at the
VERT/SINAD connector to the speaker while in
sinad metering and generate mode. Note that if
both Sinad Audio and Generate Mode Speaker
Audio are enabled, the summed audio is routed to
the speaker.
Enable/Disable Auto Switch to MON if >0.1 W
Allows the unit to automatically switch to the
MONITOR mode when power levels greater than
0.1 watt are applied to the RF IN/OUT front
panel connector.
Internal/External Input Decoding
Switches the decoder function between the
internal monitor demodulated signal and the
signal at the VERT/SINAD front panel con-
nector.
NOTE
Display Timeout Interval
Permits the entry of the timeout interval to blank
the screen after a period of no inputs (key or
tuning knob) from the operator.
Deviation Level Alarm
Allows entry of the deviation level for the
audible deviation limit alarm in MONITOR
mode.
High Pass
Provides softkey selection of monitor baseband
high pass filter frequency.
Low Pass
Provides softkey selection of monitor baseband
low pass filter frequency.
600 Ohm Metering(Option)
Allows the user to select input impedance
(1 megohm or 600 ohm) of the ACVM, SINAD,
and Distortion functions.
When the 600 ohm load is selected, the
maximum allowable input to these metering
functions is reduced to approximately 25 VAC
maximum due to power dissipation limits.
Overload protection is provided by means of a
reset circuit that monitors input leveland
switches the 600 ohm load when the maximum
input level is exceeded. If this occurs, simply
remove the overload and activate the
OVERLOAD RESET
"600 ohm metering:" field of the Special
Function Screen.
Filter (if equipped)
Allows the user to enable/disable internal
C-MSG or CCITT filters.
59
CAUTION
softkey located at the
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