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Model 5344S
Operation and Programming
LOOP BANDWtDTH-WB/NB (WIDE BAND/NARROW BAND)
This switch sets locking loop bandwidth to about 100 kHz (WB), recommended for
sweepers, or to about 20 kHz (NB), recommended for signal generators in CW mode only.
The NB mode often yields better phase noise performance, but the WB mode is
recommended to lock noisier sources (like sweepers) or any source when sweeping.
The position of the LOOP BANDWIDTH switch is indicated by the MANUAL or AUTO
LOCK key light when in LOCK mode. If the switch is in the wideband (WB) position, the
LOCK light is always on. In narrowband (NB), the light flashes slowly.
SUBHMNC/NORM (SUBHARMONIC/NORMAL) MODE Switch
This switch, when in the SUBHMC position, defeats the upper and lower frequency limits,
and enables the use of a Frequency Multiplier. See paragraph 3-89.
PROCESSOR INTERFACE Connector
Provides the electrical connections for the interface cable between the 5344A and the
counter.
WARN8NG
ANY INTERRUPTION OF THE PROTECTIVE (GROUNDING)
CONDUCTOR INSIDE OR OUTSIDE OF THE INSTRUMENT OR
OR DISCONNECTING OF THE PROTECTIVE EARTH TERMINAL
IS LIKELY TO MAKE THE INSTRUMENT DANGEROUS. (See
paragraph 2-14.)
3-106.
Function Key Operation
3-107.
Pressing any FUNCTION key (Figure 3-6) results in termination of any other parameter
display or change in progress. The indicator light in the previously selected function key is turned off.
The light associated with the newly selected parameter is turned on, and the selected value of that
parameter is displayed (except as mentioned for marker frequencies and the Frequency Multiplier,
which require that a digit key also be pressed before the value can be displayed). Once the parameter
is displayed, it can be changed via the Numeric Entry Keys (all parameters), Increment/Decrement
keys (frequency parameters only except STEP SIZE), or the Tuning Knob (all parameters except
FREQUENCY MULTIPLIER).
3-108.
5344A Display While Locked
3-109.
In LOCK mode, the 5342A/43A front panel displays the following as listed in Table 3-4:
Table 3-4. 5344A Display While Locked
Mode
5342/5343A Display
CW
CW Frequency
CF/AF
CF Frequency
START/STOP
Start Frequency
LOCK/ROLL
LOCK/ROLL START Frequency
3-23
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