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Operation and Reference
Turn-On State
Man
RS232
A
The initial state of the HP 3325B at power up is dependent upon the setting
of the rear-panel Tum-On Preset switch. With the Turn-On Preset switch
in the up (1) position, the turn-on state is the preset state described in
"The Preset State and the Instr Preset Key." With the Turn-On Preset
switch in the down (0) position (and the Enhancements switch in the up
(1) position), the setup state in effect when power is removed is used as the
turn-on state.
Enhancement Mode
Enhanced mode refers to the HP 3325A features that were improved to
create the HP 3325B. In this mode all stored information is retained in
nonvolatile memoiy Stored information may be erased by overwriting the
information in memory or by applying power with the green [Instr Preset]
key depressed (memory clear).
HP 3325A (Compatibility) Mode
In this mode, stored information cannot be recalled after the power switch is set to the
standby position.
Note
See table 3-2 for a comparison of compatible and enhanced features.
Power-Down State/Turn-On Preset
The last operating state prior to removing power is also retained in nonvolatile memory. This
operating state is restored by pressing the [Recall] key followed by the [-] (minus) key.
The setup state stored in the power-down memory can be selected as the turn-on state
through the use of the Enhancements and Turn-On Preset switches. To allow the HP 3325B
to restore the power-down state, set the Enhancements switch to the up (1) position, and the
1 urn-On Preset switch to the down position (0). Restoring the power-down state at turn-on
is disabled by setting the Turn-On Preset switch in the up (1) position.
Warm-Up
Warm-up time is the amount of time the HP 3325B is connected to power. The HP 3325B
without the high stability frequency reference (option 001) requires 30 minutes of warm-up
time to meet all specifications. The HP 3325B with option 001 requires 15 minutes of
warm-up tune to meet frequency specifications if power is disconnected for less than
24 hours. If power is disconnected from the HP 3325B with option 001 for more than
of wm-up time may be required to meet frequency specifications,
me HR 66203 with option 001 requires 30 minutes of warm-up to meet other specifications.
Moving the power switch from the I position to the (6) position places the
HP 3325B in standby. In standby, power is removed from all circuits except those
that should be kept warm to minimize warm-up time.
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