HP 3326A Operating And Reference Manual page 40

Sweep
Single Sweep
The SINGLE key initiates a single linear sweep. The indicator above the SINGLE key
illuminates when a single sweep is in progress. With a ramp sweep selected (i.e. TRI-
ANGLE indicator extinguished), the SINGLE key initiates a sweep from the start fre-
quency to the stop frequency over the specified sweep time. Upon reaching the stop
frequency, the frequency is quickly changed to the start frequency. With a TRIANGLE
sweep selected, the SINGLE key initiates a sweep from the start frequency to the stop
frequency over the specified sweep time. The stop frequency is maintained until the
SINGLE key is pressed. Pressing the SINGLE key initiates another sweep from the stop
frequency to the start frequency.
HP-IB Example:
"SS"
Continuous Sweep
The CONT (CONTinuous) key initiates a continuous linear sweep. The indicator above
the CONT key illuminates when a continuous sweep is in progress. With a ramp sweep
selected (i.e. TRIANGLE indicator extinguished), the CONT key initiates a. repetitive
sweep from the start frequency to the stop frequency over the specified sweep time.
Upon reaching the stop frequency, the frequency is quickly changed to the start fre-
quency in preparation for the next sweep. With a TRIANGLE sweep selected, the CONT
key initiates a repetitive sweep from the start frequency to the stop frequency and back
to the start frequency. Each sweep (from either the start frequency to stop frequency,
or from stop frequency to start frequency) is over the specified sweep time.
HP-16 Example:
"SC"