Atec Yokogawa-TA320 - Manual (Page 3)

13
TIME INTER
V
AL ANAL
YZER & UNIVERSAL COUNTERS
RECORDERS
WAVEFORM
MEASURING
INSTRUMENTS
DIGITAL
MEASURING
INSTRUMENTS
INDEX
TIME INTERVAL ANALYZER & UNIVERSAL COUNTERS
TA320
Time Stamp Mode
± 300 ps rms
± √ N × (rising trigger error + falling trigger error + trigger level timing error)
* 5 : The specification changes as shown below if the trigger slopes make transitions represented as :
Time Stamp Mode
300 ps rms
± A-input trigger error ± B-input trigger error ± trigger level timing error
Hardware Histogram Mode
The larger value, either ± 300 ps rms or the display resolution, ± A-input trigger error ± B-input trigger error
± trigger level timing error
* 6 : Conditions for continuous measurement
α : The A-to-B interval must be greater than 5 ns.
β : The B-to-A interval must be greater than 30 ns.
If the trigger slopes make transitions represented as
Notes: The trigger error, rising trigger error, falling trigger error, A-input trigger error, and B-input trigger error are represented by:
X: Noise of the input amplifier
En: Signal noise at a frequency within the bandwidth (100 MHz)
S.R: The slew rate of a signal being measured [V/s]
The trigger level timing error is represented by:
± (15 mV/start signal’s slew rate – 15 mV/stop signal’s slew rate) ± trigger level setting accuracy/start signal’s slew rate ± trigger level setting accuracy/stop signal’s slew rate
Specifications Related to Functions
The specification changes as shown below if the trigger slope is “22T”:
Time Stamp Mode
± 300 ps rms
± rising trigger error ± falling trigger error ± trigger level timing error
Hardware Histogram Mode
The larger value, either ± 300 ps rms or display resolution, ± rising trigger error ± falling trigger error ± trigger
level timing error
N: The number of edges that has passed through during a time interval of 22 × T.
* 4 : Measurement takes place only when an interval between the edges of a 22T input signal matches the time interval of 22 × T.
Item
Display formats
Time stamp mode
Histogram * 1
Time variation* 2
List (time stamps, measurements and data numbers)* 2
Statistics (statistical data)* 3
● Display Formats
Specifications
Hardware histogram mode
Histogram* 1
List (measurements and their frequencies)
Statistics (statistical data)*
3
1
n
(Xi–AVE) 2 × probability
i
Σ
n
i=1
√
Item
Maximum value
Minimum value
Average
Sandard deviation* 4
Peak-to-peak
Flutter
Jitter 1* 5
Jitter 2* 5
Time stamp mode
MAX = [Xi] max
MIN = [Xi] min
AVE =
σ = , where n = the number of samples
P–P = MAX – MIN
σ /AVE = × 100%
σ / T = × 100%
MELE = × 100%
● Statistical Computation (for statistics and histogram formats only)
Specifications
|AVE–X CENTER |
Ts
σ
Ts
σ
AVE
1
n
(Xi–AVE) 2
Σ
n
i=1
√
1
n Σ n
i=1
Xi
Hardware histogram mode
MAX = [Xi] max
MIN = [Xi] min
AVE =
σ = where n = the number of histograms
P–P = MAX – MIN
σ /AVE = × 100%
σ / T = × 100%
MELE = × 100%
|AVE–X CENTER |
Ts
σ
Ts
σ
AVE
1
n Σ n
i=1
Xi × probability
i
* 1 : The user can view up to two statistical values.
* 2 : The time resolution in the time stamp mode is 100 ns both for the X-axis of the time-
based variation format and for the time stamps of the list format.
* 3 : Allows the display of all statistical values and viewing of a bar-graph representation
of standard deviations.
* 4 : Standard deviation–when in pulse width measurement with a trigger slope of
σ
a
= Standard deviation for a fransition represented as “ to ”
σ
p
= Standard deviation for a transition represented as “ to ”
* 5 : Ts = Any constant keyed in
X CENTER : The center value in a window in a case where the multi-window function
is in use
* 3 : The specificatin changes as shown below if the trigger slope makes a transition represented as
σ p + σ a
2
22
×
T ( ≠ 22 × T) 22
×
T
T: any value of time keyed in
A
Measured Measured Not measured
B B A A
MIN (71ns)
B
α β
A
Measured Measured
A B
X 2 + En 2
S.R