HP 3326A Operating And Reference Manual page 44

Linear Frequency Sweep
Time
The TlME key enables display, entry, or modification of the linear sweep time for both
channels. The indicator above the TIME key illuminates when a time value is displayed.
The displayed time value is changed with the numeric keypad and units keys, or modi-
fied with the MODIFY controls. The SEC and mSEC units keys end entry of numeric
values. The time range is 5 milliseconds to
1000
seconds, with a resolution of 1 mil-
lisecond.
HP-IB Example:
"ST1 M25MS"
Marker Frequency
The MKR FREQ (MarKeR FREQuency) key enables display, entry, or modification of
the marker frequency of the channel selected with the CHAN key. The indicator above
the MKR FREQ key illuminates when the marker frequency value is displayed. The dis-
played frequency value is changed with the numeric keypad and units keys, or modi-
fied with the MODIFY controls. The MHz, kHz, and Hz units allow convenient entry of
frequency values. Frequency resolution is I pHz for frequencies below 100 kHz and
1 mHz for frequencies above 100 kHz. Only one marker is available.
NOTE
When different start or stop frequencies are entered
for each channel, selecting alternate channels can
have the apparent effect of changing the marker
frequency, Although the marker occurs at the same
time, each channel may have a unique frequency
at that time.
For a marker signal to be generated, the MKR FREQ must be within 3 milliseconds of
the start or stop frequency. The following equation may be used to determine the ap-
proximate marker offset from the start or stop frequency:
0.003
x
SPAN
MARKER OFFSET
1
SWEEP TlME
The marker value is accepted and the message "Error 24 RNGE" is displayed if the
marker value is outside the sweep frequency span. The Z-BLANK output is coincident
with the start and stop frequencies and may be used for the marker of these frequencies.
HP-1B Example: