HP 3336A - Page 34

Model 3336A/B/C
3-71. Sweep Time Limits.
3-72. The maximum sweep time for all sweep types and sweep modes is 99.99 sec. The sweep
time resolution is 0.01 sec for sweep times = 1 sec, and 0.001 sec for sweep times < 1 sec.
The minimum sweep times are:
Linear Sweep
Single............006. Bag Ath Sratdovia wlvate euacttenee PUSS 0.01 sec
COntinUOUS 3 ne 6 ees Be Re cia eee dd wee dew aiviw eta as ewe is 0.01 sec
Log Sweep
Singles css KC wa ieeg tik Keehn one ee ee we 2.00 sec
COntinuOUS i026 ooo bee waite cee ee elle ROE CREO es 0.10 sec
NOTE
In Single Log Sweep, the sweep time is increased between
segments. The time increase in seconds, is approximately equal to:
Stop Frequency
.045 (10 log Start Frequenc: Frequency ’ seconds
3-73. Sweep Bandwidth Limits.
3-74. The maximum sweep bandwidths are the specified frequency limits of each output.
(See Paragraph 3-14) The minimum sweep limits are:
LOg SWEEP e. ish cee eee taGh eae sale cd ee Ad 1 decade
Linear Sweep............2.02- 2 eee (.1 Hz/sec) x (sweep time)
3-75. Sweep Modification.
3-76. While the instrument is continuously sweeping, the Sweep Time, Start Frequency,
Stop Frequency, Marker Frequency, Sweep Bandwidth and Output Amplitude can be
modified. When a modification is entered, the sweep stops, resets to the Start Frequency and
then, after a brief computation period, the sweep automatically restarts.
3-77. Sweep Bandwidth Modification. In Linear Sweep Mode, the sweep bandwidth can be
doubled or halved by pressing the Blue shift key followed by Af x 2 or Af + 2. When
MKR -— cf is used to set the sweep center frequency equal to the marker frequency in con-
junction with these bandwidth modification keys, it is possible to ‘‘ZOOM”’ in on a specific
point of the sweep. For example, during a.continuous linear sweep from 1 MHz to 10 MHz
while monitoring the Marker and the response of the swept device on an oscilloscope, an in-
teresting response is noted at about 8 MHz. This point of interest, however, is too compress-
ed to analyze properly. To “‘ZOOM”’ in on this point, center it in the display by (1) modify-
ing the Marker frequency until the marker transition occurs at the same time as the point of
interest and (2) pressing the Blue shift key followed by the MKR ~—cf. The point of interest
should now be in the center of the display. (3) Expand the display by using the Blue shift key
and the Af + 2 key. Repeat these steps as necessary to modify the sweep until the desired
display is produced.
Operation
3-13