HP 53132A Assembly And Service Manual page 227

Chapter 7 HP 53131A/132A Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Time Interval
Measurement is specified over the full signal ranges
Results Range:
LSD:
RMS Resolution:
t
res
Systematic Uncertainty: ±(Time Base Error × TI) ± Trigger Level Timing Error ± 1.5 ns Differential Channel Error (HP 53131A)
Time Interval Delay
After a Time Interval Measurement has begun by satisfying the trigger conditions on Channel 1, the instrument will wait for the
user-entered delay time to elapse before the end-of-measurement trigger will be accepted on Channel 2. Please refer to Measurement
Arming for additional information.
⁄
Ch1
Frequency Ratio:
Ch2
Measurement is specified over the full signal range of each input.
Results Range:
'Auto' Gate Time:
LSD:
1
Ratio 1 2 ⁄ :
---------------------------------------------------------- -
×
Ch2 Freq Gate Time
Ch2 Freq
Ratio 2 1 ⁄ :
------------------------------------------------------------------
2
( ) ×
Ch1 Freq Gate Time
RMS Resolution:
× (
2 1 Ch1 Freq Ch2 Trigger Error
+
Ratio 1 2 ⁄ :
------------------------------------------------------------------------------------------------------------ -
Ch2 Freq Gate Time
× ×
2 Ch2 Freq
Ratio 2 1 ⁄ :
------------------------------------------------------------------------------------------------------------------------------------------- -
(
Ch1 Freq
To minimize relative phase measurement error, connect the higher frequency signal to Channel 1 when possible.
7
See Specifications for Pulse Width and Rise/Fall Time measurements for additional restrictions on signal timing characteristics.
Assembly-Level Service Guide
7
of Channels 1 and 2.
5
–1 ns to 10 s
53131A 53132A
------------------------------------------------------------------------------------------- -
500 ps 150 ps
2 2
t Start Trigger Error Stop Trigger Error
+ +
re s
53131A 53132A
------------------------------------------------------------------------------------------- -
750 ps 300 ps
⁄
Ch1 Ch2
Ch3
–10 11
10 to 10
100 ms (or sufficient cycles on Channel 2 or 3 to make a valid measurement, whichever is longer)
2
× )
×
( ×
1 + Ch1 Freq Ch2 Trigger Error
2
) ×
Gate Time
2
± 900 ps Differential Channel Error (HP 53132A)
⁄ ⁄
Ch3
Ch1 Ch1
1
Ratio 1 3 ⁄ :
---------------------------------------------------------- -
×
Ch3 Freq Gate Time
Ch3 Freq
Ratio 3 1 ⁄ :
------------------------------------------------------------------
2
( )
Ch1 Freq
× (
2 1 Ch1 Freq Ch3 Trigger Error
+
Ratio 1 3 ⁄ :
------------------------------------------------------------------------------------------------------------ -
Ch3 Freq Gate Time
) 2
×
2 Ch3 Freq
Ratio 3 1 ⁄ :
------------------------------------------------------------------------------------------------------------------------------------------- -
×
Gate Time
2
× )
×
× ( ×
1 + Ch1 Freq Ch3 Trigger Error
2
( ) ×
Ch1 Freq Gate Time
) 2
7-9