Model 5314A
Operation
NOTE
0
SHIFT KEY
1 Hz/N=100
There are two additional functions which are selected using
combinations of switches @and@. These two functions
are Self-Check and Ratio A to B. For self-check mode, place
both function switches
and @in the IN position. The
instrument is now making a frequency measurement on the
internal 10 MHz time base. Activating switches
causes 10 MHz to be displayed. Activating
causes 100 MHz to be displayed. Resolution selection
switches can now be checked for
Ratio A to B, place both function switches
OUT position. For more details on
paragraph 3-12 and
Figure
3-7.
IN/OUT position determines the function selected by keys
IN
position selects the bottom row functions. OUT position selects the upper
row functions.
NOTE
The following three switches
are dual purpose.
Depending on the function selected (Frequency, Period,
Ratio, etc.) the switches either represent the resolution and
bandwidth (gate time) or the sample size (N samples).
In frequency
(10
Hz to
10 MHz),
this switch,
when
IN,
gives a display with a
1 Hz resolution (1 second gate time). For frequencies between 10 MHz and
100 MHz, see the explanation for switch@. In period, this switch, when
IN,
causes the HP 5314A to measure 100 periods and display the average
value
in microseconds.
In ratio, this switch when
IN,
causes the
HP 5314A
to
make 100 measurements and display the average ratio. This switch does
not
improve accuracy beyond 100 nanoseconds
for time interval
measurements!
I
10 Hz/N=10
In frequency (10 Hz to 10 MHz), this switch, when
IN,
gives a display with a
10 Hz resolution (100 millisecond gate time). For frequencies between
10 MHz and 100 MHz, see the explanation
for switch@
In period, this
switch, when IN, causes the
HP 5314A
to
measure 10 periods and display
the average value
in microseconds.
In ratio, this switch, when
IN,
causes the HP 5314A to make 10 measure-
ments and display the average ratio. This switch does
not
improve accuracy
beyond 100 nanoseconds
for time interval measurements!
NOTE
There is another resolution available using
in addition to the two resolutions called out on the
front panel. It is 0.1 Hz N = 1 0 0 0 This is generated when
switches
are in the OUT position. In fre-
quency (10 z to 10 MHz), with these three switches out,
the
HP 5314A
gives a display with 0.1 Hz resolution (10
second
gate time). For frequencies between
MHz and
100 MHz, see the explanation
for switch
In period,
with these three switches out, the HP 5314A measures 1000
periods and displays the average value in microseconds. In
ratio, with these three switches out, the HP 5314A makes
1000 measurements and displays the average ratio. This
switch combination does
not
improve accuracy beyond
100
nanoseconds
for time interval measurements.
Figure
3-2. Front
Panel Controls and Connectors (Continued)
3-5
