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HNLOCK Harmonic Number Lock
Once HNLOCK is set, only frequencies and spans that fall within the frequency band of the
current harmonic may be entered. The span is reduced automatically to accommodate a center
frequency specified near the end of the band range.
Note
Before changing the frequency range to another harmonic, unlock the band
with the harmonic unlock command, “HNLOCK OFF;” or “HNUNLK;
“.
BAND LOCK ON (HNLOCK ON)
Start Frequency
If a start frequency is entered that is outside of the current band boundaries, it will be set
to the nearest band edge instead. If a start frequency that is greater than the current stop
frequency is entered, the (possibly modified) start frequency is used for both the start and the
stop frequency; therefore, the span will be set to zero. If the start and stop frequencies specify
too large a span, they will be modified. (Also see
“FA.“)
Stop Frequency
If a stop frequency is entered that is outside of the current band boundaries, it will be set to
the nearest band edge instead. If a stop frequency that is less than the current start frequency
is entered, the (possibly modified) stop frequency will be used for both the start and stop
frequency; therefore, the span will be set to zero. (Also see “FB.“)
Center Frequency
The span will be modified if necessary to get the center frequency specified without crossing
the band edges. (Also see “CF.“)
Span
The span will be limited as necessary to keep the start and stop frequencies within the band
edges without changing the center frequency. The maximum span allowed is 2.943
GHz
in band
0, 3.600
GHz
in band 1, 6.957
GHz
in band 2, and 7
GHz
in higher bands. (Also see “SP.“)
BAND LOCK OFF (HNLOCK OFF)
The start and stop frequencies are bounded by the range of the instrument.
The frequency not specified will be bounded by the following scheme:
Continuous Sweep Mode: If the specified frequency is in band 0, the values will be contained
by the bounds of band 0. If the value is in the harmonic band range, the values will
be bounded by the top of the instrument range and the lower end of band 1. (Also see
“CONTS.
“)
Single Sweep Mode: The values are bounded by the instrument range only; therefore, band 0
can be included in a multiband sweep in single mode. (Also see “SNGLS.“)
Programming Commands 5-231