HP 3335A - Preset Register Management; Preset Entries and Data Merging; Recalling Data from Preset Registers; Phase Increment Displays

Model 3335A
Ø Indicator. Indicates the phase difference introduced with
respect to the initial phase of the present frequency. This
indicator appears when an INCR key is pressed when Ọ
INCR is displayed.
ENTRY Indicator. Indicates the display holds a phase incre-
ment entry not yet finalized by a data entry key.
The display indicates the phase increment programmed.
Example:
Program a phase increment of 45.0 degrees.
Display Result: 45.0 deg
Press the INCR up arrow two (2) times.
Display Result: Display annunciator shows @ and display
shows 90.0 deg.
NOTE
If an INCR key is held, the output is phase
incremented continuously.
3-37. Phase/Phase Increment Displays.
3-38. When the display indicates the @ difference intro-
duced by the phase increment and a new phase increment
entry is made which is not prefaced by the Ø INCR key,
the display automatically reverts to a @ INCR display. The
entry can be finalized like any other phase increment entry.
Therefore, if the display is indicating phase, a phase incre-
ment entry need not be prefaced by the @ INCR key.
3-39. Preset Entries.
3-40. All operating parameters of the FUNCTION group
can be stored in one of ten PRESET registers. The ten
registers are numbered O through 9 and are capable of
storing ten different sets of the operating parameter’s
frequency, amplitude, frequency increment, amplitude
increment, phase increment and sweep width. At turn-on,
all registers contain the turn-on operating parameters. The
PRESET keys which control the registers are STORE,
DISPLAY and RECALL. A description of the PRESET
keys follows.
KEYS:
STORE Key. Used to store the operating parameters of the
front panel output. The digit key of the register to store the
parameters must be pressed following the STORE key. This
stores the operating parameters frequency, amplitude, fre-
quency increment, amplitude increment, phase increment,
sweep width, and the state of the manual tune control with-
out affecting the output signal.
RECALL Key. Used to recall the operating parameters of
a particular register. The digit key of the register containing
Section IH
the operating parameters desired must be pressed following
the RECALL key. This changes the amplitude and fre-
quency of the output signal to that stored in the register.
It also changes all other FUNCTION parameters to that
stored in the register (e.g., AMPTD INCR, FREQ INCR,
Ø INCR and SWEEP WIDTH).
DISPLAY keys. Used to display a particular operating
parameter stored in a register. Displaying a parameter does
not change the output signal but is displayed as an entry.
This entry can be finalized by pressing a DATA ENTRY
key.
Example.
Preset the following operating parameters in storage register
2:
FREQUENCY 2 MHz
AMPLITUDE 2 dBm
FREQ INCR 200 Hz
AMPTD INCR 0.2 dBm
INCR 2 degrees
SWEEP WIDTH 2 kHz
Preset the following operating parameters in storage register
3, š
FREQUENCY 3 MHz
AMPLITUDE 3 dBm
FREQ INCR 300 Hz
AMPTD INCR 0.3 dBm
Ø INCR 3 deg
SWEEP WIDTH 3 kHz
First program all parameters; then press STORE 2.
NOTE
In the examples for STORE 2 and STORE 3,
different parameters are displayed when the
STORE key is pressed to preset the register.
SWEEP WIDTH is displayed when STORE 2
is pressed. 6 INCR is displayed when STORE 3
is displayed. In the next two examples, the
RECALL function is illustrated. When data is
recalled from a preset register, the parameter
displayed when that register was preset is the
parameter returned to the display. In the case
of RECALL 2, SWEEP WIDTH will be returned
to the display. All other parameters will be
changed to that preset in register 2. For the
RECALL 3 case, @ INCR will be returned to
the display. All other parameters will be
changed to that preset in register 3.
Recall parameters of register 2 by pressing RECALL 2.
Result: Display indicates SWEEP WIDTH of 2.0 kHz. When
this set of parameters was stored, SWEEP WIDTH was last
displayed. When recalled, the parameter last displayed at
STORE is returned to the display.
3-7