Model 5314A
Operation
10 Hz/N=1
This switch,
when
IN, reroutes the Channel A input
by-10 prescaler circuit (when FREQ A/START A switch
MUST be used for frequencies between
IO MHz
an
quency, this switch, when
IN,
prescales the input signal by
10
and gives a
display with a
10
Hz resolution (prescale by
10
with a I-second gate time).
This switch and switch@ (1 Hz/N=lOO) IN prescales the input and gives a
display with a
100 Hz
resolution (prescale by
IO
with a 100-millisecond gate
time). This switch and switch
(IO
Hz/N=1O) IN
prescales the input and
gives a display with a
1
kHz resolution (prescale by 10 with a IO-millisecond
gate time).
In Period, this switch
IN
causes the
HP 5314A
to measure 1 period and
display the value
in microseconds (this switch is used
for single-shot period
measurements).
In Ratio, this switch
IN
causes the
HP 5314A
to make
1
measurement and
display the ratio (this switch
is used
for single-shot ratio measurements).
In Time Interval, this switch should be pressed. This programs the HP5314A
to make single-shot time interval measurements.
In Start, the HP 5314A counts the input directly (IO Hz to 10 MHz) and
displays in units. With this switch IN, the input is prescaled by 10 and the
display
is in kilo units.
This switch MUST be
used in START A
for signals
above
10 MHz.
SLOPE This switch setting determines which slope of the Channel
A
input signal
will be used as the triggering slope.
LEVEL A LEVEL control used in conjunction with the attenuator switch
to
select the relative voltage at which triggering occurs. Approximately
t350 millivolts is the amount varied. The input amplifiers are ac coupled.
The actual dc level of the trigger point is unknown.
INPUT A BNC connector for the
A
channel signal input. The input impedance is
1
Meg. For more information on the input signal, refer to Table 7-7,
Specifications.
ATTN Channel A input signal attenuator switch. Used in conjunction with the
LEVEL control to set the trigger point. The input signal is not affected in
Xl
position. Input signal amplitude is reduced by a factor of 20 in the X20
position.
i SEP/COM A
INPUT B
Input amplifier control switch.
a. SEP - Allows independent operation of A and B channels.
b.
COM A - Operationally connects Channels A and B in parallel. Used
for single source time interval measurements. Channel B input jack
is not active. The input impedance remains the same as in
SEP.
BNC
connector
for
the B channel signal input. The input impedance is
1
Meg. For more information on the input signal, refer to Table 7-7,
Specifications.
SLOPE
LEVEL B
This switch setting determines which slope of the Channel B input signal
will be used as the triggering slope.
LEVEL control used to select the relative voltage at which triggering
occurs.
When switch
is in SEP,
the trigger voltage varies approxi-
mately
mV.
When switch
is in COM A, the trigger voltage varies
approximately
mV times the attenuator (switch-a
)
setting. The
input amplifiers are ac coupled. The actual dc level of the triggering point
is unknown.
3-6
Figure
3-2.
Front
Panel
Controls and
Connectors (Continued)
