HP 3336A Operating Manual page 37

Operation
Store the current operating state, press the STORE 0-9 key followed by the number of the
desired storage location. If two programs are stored in the same location, the first program
is lost. To Recall an operating state, press the RECALL 0-9 key followed by the number of
the location where the program is stored.
3-96. All stored information is lost when power is removed from the instrument or when the
POWER switch is set to STBY. Any stored phase information is invalid because the phase of
the output signal is arbitrary when recalled. The command to start a frequency sweep is not
saved and therefore, either the CONT key or SINGLE key must be pressed after recalling a
frequency sweep.
3-97. OPERATOR MAINTENANCE.
3-98. Maintenance performed by the operator is limited to checking and cleaning the air
filter and replacing the line fuse.
3-99. Line Fuse Replacement.
3-100. To replace the line fuse (located in a fuseholder on the rear panel) disconnect the
power cord and rotate the fuseholder's slotted cap '4 turn counterclockwise. Install the new
line fuse in the fuseholder and secure it by rotating the slotted cap "% turn clockwise.
Generally, if the line fuse needs replacement, a malfunction exists in the instrument and it
must be referred to qualified service personnel. The correct replacement fuse is:
Line Voltage Fuse -hp- Part No.
100/120 V 2110-0001
220/240 V Y, Amp 2110-0012
DO NOT USE SLOW BLOW FUSES
The use of SLOW BLOW fuses prevents the proper operation of
an important protection circuit and may result in damage to the in-
Strument.
3-101. Air Filter Replacement.
3-102. The Air Filter (located over the intake fan on the rear panel) should be inspected fre-
quently and cleaned or replaced as necessary to allow a free flow of air through the instru-
ment. To remove the filter, disconnect the instrument from power and remove the four
thumbscrews from the filter retainer. Remove the filter and wash thoroughly using a mild
soap, rinse clean and air dry. If the filter needs replacement, use -hp- Part No. 3150-0227.
3-103. REMOTE OPERATION.
3-104. Introduction.
3-105. The Model 3336 can be remotely operated via the Hewlett-Packard Interface Bus
(HP-IB). This section describes how the Model 3336 responds to specific messages and how
Model 3336A/B/C
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