HP 3335A - Front Panel Controls (Continued); Increment (INCR) Keys; Frequency Control Keys

Model 3335A
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AC Line input Connector.
AC Line Fuse.
Line Voltage Selection Switches. Used to sefect the ac line
input for the voltage of the power source,
HP-IB Connector. Used to interface the instrument with the
HP-!B for remote operation.
HP-iB Listen Address Selection Switches. Used to set the
instrument listen address.
10 MHz OUTPUT Connector. Provides a 10 MHz external
reference signal generated by the instrument’s reference
section,
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40/N MHz REF INPUT Connector. Provides the input to the
reference section sampling detector to phase-iock the
master oscillator. The notation 40/N MHz means this input
must be a subharmonic of 40 MHz, The input can be the in-
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Option 002/004: Front Panel.
Figure 3-1. Front and Rear Panels (Cont'd).
keys are used to complete a data entry or to clear an entry
made in error. The FUNCTION and DATA groups together
are used to program the operating parameters.
3-18. INCR Keys.
3-19. There are two keys in the INCR group—an arrow
up and an arrow down. These keys are used to increment
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Section IH
ternal 10 MHz crystal oscillator from the REF OUTPUT
item 25) or an external standard.
© 10 MHz REF OVEN OUTPUT Connector. Provides the out-
put from the temperature-stabilized crystal oscillator. it is
coupled to the 40/N MHz INPUT connector {item 24} to
supply the reference signal when an external standard is
not used.
EXT LEVEL INPUT Connector. Provides a means of controli-
ing amplitude by use of an external amplitude reference.
LEVELING Switch. Activates the EXT LEVEL INPUT when
in the top position. When in the INTERNAL LEVEL position,
leveling is controlied by the instrument.
TELECOMMUNICATIONS SWEEP Switch. In Track posi-
tion, alters the AUTO sweep by slowing it to ~ 4 sec per
step and blanking the amplitude during frequency changes.
(Options 002, 003 and 004 only.)
Option 003:
the frequency, amplitude or phase (whichever function is
displayed), by the increment parameter programmed from
the FUNCTION group. The key pressed determines the
direction the increment is made.
3-20. FREQUENCY Keys.
3-21. The FREQUENCY keys are divided into two sub-
Rev. A 3-3