53131A/ABA Agilent Technologies Test Equipment, 53131A/ABA Datasheet - Page 7

• Manufacturer Part Number: 53131A/ABA
• Description: COUNTER, 225 MHZ UNIVERSAL COUNTER 10 DIGITS/S
• Manufacturer: Agilent Technologies Test Equipment

Auto Arming: Measurements are initiated
immediately and acquired as fast as possible,
using a minimum number of signal edges.
Timed Arming: The duration of the measurement
is internally timed to a user-specified value
(also known as the “gate time”).
Digits Arming: Measurements are performed
to the requested resolution (number of digits)
through automatic selection of the acquisition
time.
External Arming: An edge on the External Arm
Input enables the start of each measurement.
Auto Arming, Timed arming modes or another
edge on the External Arm Input may be used to
complete the measurement.
Time Interval, Pulse Width, Rise/Fall Time (53131A and 53132A only):
Frequency Ratio:
Phase (53131A and 53132A)
Duty Cycle (53131A and 53132A)
RMS Resolution:
Systematic Uncertainty:
LSD: Ratio :
RMS Resolution:
Systematic Uncertainty:
RMS Resolution:
Systematic Uncertainty:
RMS Resolution:
t
res
± (Time Base Error
± (Time Base Error
where t
( ±Trigger Level Timing Error ±1.5 ns Differential Channel Error)
( ±Trigger Level Timing Error ±900 ps Differential Channel Error)
53131A
750 ps
1
2
res
Ch2 Freq
= 750 ps for the 53131A, 300 ps for the 53132A
Ch1 ,
Ch2
53132A
300 ps
Ratio :
Ratio :
Ch1 ,
Ch3
(t
(
( (
(
(T
(T
t
res
T T )
res
1
res
res
1
2
2
1
)
Gate Time
± 2x resolution
Ch2 ,
Ch1
Measurement) ± Trigger Level Timing Error ± 1.5 ns Differential Channel Error (53131A)
Measurement) ± Trigger Level Timing Error ± 900 ps Differential Channel Error (53132A)
2
)
2
2
2
2
2
2
Start Trigger Error
Ch3
Ch1
2
(2 x Trigger Error
(2 x Trigger Error
Ch2 Freq
Ch2 Freq
1
(53131A and 53132A)
Trigger Error
(Ch1 Freq
Ch2 Freq
Ratio :
(Ch1 Freq)
(Ch1 Freq)
Time Interval Delayed Arming: For Time Interval
measurements, the Stop Trigger condition is
inhibited for a user-specified time following the
Start Trigger. The 53132A offers advanced time
interval arming capabilities including use of user
specified time or Channel 2 events to delay both
Start and Stop Triggers.
Measurement Limits
Limit Checking: The measurement value is
checked against user-specified limits at the
end of each measurement.
Display Modes: The measurement result may
be displayed as either the traditional numeric
value or graphically as an asterisk moving
between two vertical bars.
1
1
2
1
2
2
2
(Ch1 Freq)
2
(Ch1 Freq
(Ch1 Freq
)
)
Gate Time
)
)
Ch2 Trigger Error)
x (1 + Duty Cycle
Stop Trigger Error
2
2
( 1
Gate Time
Gate Time
Ch2 Freq
1
Ch1 ,
Ch2
2
Duty Cycle
Ch2 Trigger Error)
Ch2 Trigger Error)
Ch2
Ch1
Phase
Gate Time
360 °
(53181A)
Frequency
Frequency
2
2
7
)
2
2
2
)
Frequency
Frequency
Frequency
2
2
360 (53131A)
360 (53132A)
°
°
For measurements using Ch3,
substitute Ch3 for Ch2 in these
equations. To minimize relative
phase measurement error,
connect the higher frequency
signal to channel 1.
360 °
Out-of-Limits Indications:
• The limits annunciator will light on the front
• The instrument will generate an SRQ if
• The limits hardware signal provided via the
• If the Analog Display mode is enabled, the
panel display.
enabled via GPIB.
RS-232 connector will go low for the duration
of the out-of-limit condition.
asterisk appears outside the vertical bars,
which define the upper and lower limits.