Clear
Point
Function Group
Menu Map
Description
Programming Codes
See Also
POWER
5
This softkey lets you change the correction value for the active
frequency point to the “Undefined” state.
SCPI: NONE, see Fltness Menu
Analyzer: NONE
m),
Fltness Menu
“Optimizing Swept Signal Generator Performance” in Chapter
I
CONNECTORS
BNC Connectors
AM/FM OUTPUT (Option 002 only) Outputs the
internally-
generated AM or FM waveform. This output can drive 50
R
or greater. When driving 100
R
or less, a selftest error may be
generated. The AM output is scaled the same as it is generated,
either 100%/V or 10
dB/V.
The FM scaling depends on the FM
deviation chosen. The following table shows the scale versus
deviation.
AM INPUT There are two AM operation modes: linear and log.
When the swept signal generator is in linear AM mode, the input
accepts a -1 to
+l
V signal. With an AM input of 0 V, the RF
output level (the reference level) is unaffected; at -1 V input, the RF
is shut off, and with a
fl
V input, the RF output is 100% (3 dB)
higher that the reference level. Therefore, there must be
23
dB of
margin between the reference power level and the maximum available
at a given frequency. The on (0 V input) to off (-1 V input) ratio is
a function of power level and frequency, but is always greater than
20 dB. The amplitude of the RF output changes linearly as the AM
input changes.
C-4 Operating and Programming Reference
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