U9361C/F/G/M RCal Receiver Calibrator Measurement Guide
13
RCal Software – Configuration
Preamp
Off
Low Band:
Use for frequencies less than
3.6 GHz
Full Range:
Use for frequencies up to 50 GHz
Low Band
path is not compatible with
Options LNP (Low Noise) or FBP (Full
Bypass).
Coupling
AC
or
DC
Not all instruments support both AC and
DC.
Phase Noise
Opt = PNO
Selects
PNO
mode used by LO synthesizer
system. Options include:
— Best Close-In
— Balance Noise and Spurs
— Best Spurs
— Best Wide-Offset
— Fast Tuning
— All
Best Close-In: better phase noise
performance at the cost of higher spurs for
offset < 600 kHz*
Balance Noise and Spurs: balanced spur
and phase noise for offset < 600 kHz*
Best Spurs: spurs held to -90 dB at the cost
of phase noise for offset < 600 kHz*
Best Wide-Offset: optimized phase noise for
offset > 800 kHz*
Fast Tuning: provides faster tuning speed
All: calibrates for all PNO modes
*Phase Noise Optimization offset
frequencies vary based on the Synthesizer
option (EP0, EP1, EP2)
μ
W Path
Options:
— Low Noise (LNP)
—
μ
W Presel Bypass (MPB)
— Full Bypass (FBP)
μ
W path reverts to STD if any points are <
3.6 GHz. In STD mode, the
μ
W Preselector
is in the circuit and the Low Noise Path is
disabled.
LNP: bypasses low-band switch to lower
noise floor (only for signals > 3.6 GHz)
MPB: bypasses preselector to lower noise
floor (only for signals > 3.6 GHz)
FBP: bypasses both the low-band switch
and preselector for the best dynamic range
(only for signals > 3.6 GHz)
Mixing Mode
Refers to ‘high-side’ or ‘low-side’ mixing (LO>RF
or LO<RF).
Normal
is default for a given band (can be either
LO > RF or LO < RF).
Alternate
if using alternate-side mixing for
digital demodulation to flip the side of image
products, then you would want to calibrate the
alternate mixing side.
All
does both.
Normal is sufficient for most use cases.
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