The Entry Keys - HP 3326A Operating And Reference Manual

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The Entry
Keys
THE ENTRY KEYS
Frequency
The FREQ (frequency) key enables display, entry or modification of the frequency of
the channel selected with the CHAN key. The indicator above the FREQ key illuminates
when the output frequency value is displayed. The displayed frequency value is chang-
ed with the numeric keypad and units keys, or modified with the MODIFY controls. The
MHz, kHz, and Hz units allow convenient entry of frequency values. Frequency resolu-
tion is 1 pHz for frequencies beleow 100 kHz, and 1 mHz for 100 kHz and above. Fre-
quency ranges are dependent upon selection of the operating mode and high voltage
option (see Figure 1-14). During a frequency change the output is phase continuous;
that is, there are no phase discontinuities in the output waveform.
NOTE
After a mode change, the channel B frequency is
set to the channel A frequency.
2 Channel Mode
Each channel frequency is set independently. The frequency range for each channel
is 0 to 13 MHz.
2 Phase or Pulse Mode
The frequency of both channels is set to the same value by a change in frequency of
either channel. The frequency range is 0 to 13 MHz.
2 Tone Mode
The channel B frequency tracks changes to the channel A frequency. The frequency
range of channel A is 0 to 13 MHz. The channel B frequency can have up to a
100 kHz offset from channel A with a maximum frequency of 13.1 MHz. If a channel
A frequency change forces the channel B frequency to less than zero, the channel B
frequency is changed to a value equal to the channel A frequency plus the absolute
value of the offset. The negative channel B value is displayed, and the channel B out-
put frequency is the absolute value of the displayed value.