HP 3335A - Amplitude and Phase Control; Amplitude Parameter Entry; Amplitude Increment Setting; Phase Increment Setting

Model 3335A
mum increment programmable is the maximum output fre-
quency of 80 099 999, 999 Hz. Trying to program an in-
crement greater than the maximum results in a flashing dis-
play indicating an illegal entry. To change the output fre-
quency by the programmed increment, the INCR keys are
activated incrementing the frequency either up or down. A
description of the keys and frequency step display indi-
cators follows.
KEYS:
FREQ INCR Key. Preface key for entering frequency
increment. When pressed, the front panel displays the pres-
ent frequency increment and the controller is enabled to
accept new frequency increment data.
DATA Keys. Used to enter the desired frequency incre-
ment.
DATA ENTRY Keys. Used to finalize the frequency incre-
ment entry. If an increment is programmed that exceeds
the maximum, the display flashes indicating an illegal entry.
INCR Keys. These keys are used to change the output fre-
quency by the programmed increment. The frequency can
be incremented either up or down dependent upon the
INCR key activated. If an INCR key is held activated, the
frequency continues to be incremented providing a step fre-
quency sweep. The magnitude of each step is determined
by the frequency increment programmed.
DISPLAY INDICATORS:
FREQUENCY INCR Indicator. Indicates the front panel is
displaying the present frequency increment or a frequency
increment entry.
ENTRY INDICATOR. Indicates the display holds a fre-
quency increment entry not yet finalized by a data entry
key.
The numeric display indicates the frequency increment pro-
grammed. Can be displayed in kHz or MHz by pressing the
desired range key.
Example:
Program a frequency increment of 12500 Hz.
Display Result: 12 500.0 Hz
Display present frequency by pressing FREQUENCY
FUNCTION key.
Display Result: Present frequency is displayed.
NOTE
This step can be omitted and the frequency
incremented by pressing an INCR key even
though FREQ INCR is displayed.
Section HI
Increment the frequency by pressing the INCR down
arrow.
Display Result: Present frequency is decreased by
12 500.0 Hz
Return to initial frequency by pressing the INCR up arrow.
Display Result: Initial frequency is displayed.
NOTE
If the front panel is displaying frequency incre-
ment, it is not necessary to preface a frequency
increment entry with the FREQ INCR key.
3-30. Amplitude Entry.
3-31. The 3335A Amplitude limits are determined by the
output impedance selected. In the standard instrument a
50 ohm or 75 ohm output impedance can be chosen. With
a 50 ohm output, the amplitude range is - 86.98 dBm to
+ 13.01 dBm. For a 75 ohm output, the amplitude range is
- 88.74 dBm to + 11.25 dBm. Any amplitude within the
range can be programmed with 0.01 dBm resolution. For
option 002, 003 or 004 instrument amplitude ranges, refer
to Table 1-2, General Information.
3-32. The desired output amplitude is programmed by
activating the AMPLITUDE FUNCTION key, DATA keys
0 through 9 and a DATA ENTRY key - dBm or + dBm. A
description of these keys and the amplitude display indi-
cators follows:
KEYS:
AMPLITUDE Key. Preface key for entering amplitude.
When pressed, the display indicates the present output amp-
litude and the controller is enabled to accept new ampli-
tude data.
DATA Keys. These keys are used to enter the desired amp-
litude.
DATA ENTRY Keys. Used to finalize the amplitude entry.
If an amplitude is programmed which exceeds the range of
the instrument, the output amplitude does not change and
the display flashes.
DISPLAY INDICATORS:
AMPLITUDE Indicator. Indicates the front panel is dis-
playing the present output amplitude or an amplitude
entry.
ENTRY Indicator. Indicates the display holds an amplitude
entry not yet finalized by a data entry key.
The numeric display indicates the amplitude programmed.
3-5