HP 5326A - Page 19

Model 5326/27A
Operation
1. SAMPLE RATE control. Applies primary
power. Works in conjunction with FAST/
NORM/HOLT) switch to control interval be¬
tween measurements.
a. FAST - Varies display time from <100
H s to >20 ms. STORAGE switch (rear
panel) must be ON to use this mode.
b. NORM - Varies display time from <
20 ms to >5 seconds.
c. HOLD - Holds display indefinitely.
2. RESET Switch. Resets display and internal
count to zero and starts new measurement.
3. INPUT C (5327A). 50-ohm input for 0 to 550
MHz frequency measurements. Has dc cou¬
pling (with INPUT C switch in + 10 position)
and sensitivity of 100 mV rms sine wave (300
mV peak-to-peak pulse). Maximum input is
±5 volts referenced to ground (DO NOT EX¬
CEED). Trigger level is zero volts. The input
is ac coupled with the INPUT C switch in
DIRECT position. The frequency range is 1
kHz to 50 MHz with a sensitivity of 5 mV.
INPUT C (5326A). 50-ohm input for 0 to 50
MHz frequency measurements. Has dc cou¬
pling and sensitivity of 5 mV rms sine wave.
Trigger level is zero volts. Maximum input is
±5 volts referenced to ground (DO NOT
EXCEED).
4. FUNCTION selector. Selects mode of oper¬
ation. Blue lettering matches corresponding
blue lettering on TIME BASE/MULTIPLIER
switch.
a. S TOP, START - Used for totalize
mode to manually open and close counter’s
main gate and to turn scaled output on and
off. Frequency input range is 0 to 10 MHz.
b. PERIOD AVG A - Sets counter to
measure period of signal applied to
CHANNEL A input. Use MULTIPLIER
switch to select number of periods to be
averaged. Input frequency range is 0 to
10 MHz.
c. T.l. AVG A to B - Sets counter to
measure average time interval, A to B.
Channel A starts interval and Channel B
stops the interval. Use MULTIPLIER
selector to set number of time intervals to be
averaged. Time interval input range is 150 ps
to 10 sec; there must be a 150 ns deadtime
between intervals.
d. T.L A to B - Sets counter to measure
time interval A to B. Channel A starts meas¬
urement and Channel B stops the measure¬
ment. T.l. input range is 0.1 ps to 10 9 sec.
The internal time base frequency is divided
by the setting of the MULTIPLIER switch and
totalized for subsequent display. The more
cycles of the oscillator frequency that are
counted during A to B time, the better the
resolution. There must be 150 ns deadtime
between Channel B and Channel A trigger
points.
e. PERIOD A - Sets counter to measure
a single period of the signal applied to
CHANNEL A input. Use MUTLIPLIER
switch to set counted internal oscillator fre¬
quency and therefore the desire resolution.
Frequency input range is 0 to 10 MHz.
f. F REQ A - Sets counter to measure
frequency applied to CHANNEL A input.
Use TIME BASE switch to set gate time and
resolution. Frequency input range is 0 to 50
MHz.