Tektronix 2465B - Page 161

Performance Characteristics
Table 6-4 (cont)
Characteristics
Performance Requirements
DEFINITIONS
A Trigger Level Error = (A Trigger Level Readout Error)/SR
A
.
B Trigger Level Error = (B Trigger Level Readout Error)/SR
B
.
t
r
= rise time, reference trigger signal.
t
r
= rise time, delta trigger signal.
SR
A
= slew rate at trigger point, A Sweep trigger signal in div/sec.
SR
B
= slew rate at trigger point, B Sweep trigger signal in div/sec.
SR
REF
= slew rate at trigger point, reference trigger signal in div/sec.
SR
DELT
= slew rate at trigger point, delta trigger signal in div/sec.
TJE = trigger jitter error. !
For delay or delta time, disregarding noise in the signal, this term contributes
<1 LSD if the slew rate is greater than 0.03 vertical div/ns or if the slew rate is
greater than 30000 vertical div/horizontal div.
Trigger Jitter = [(Reference Trigger Signal Jitter)
2
+ (Delta Trigger Signal Jitter)
2
4- (A Sweep Trigger Signal Jitter)
2
]
1
'
2
.
Reference Trigger Signal Jitter = (e
ng
+ e
n
)/SR
REF
.
= 0 for Frequency mode.
e
n
= scope noise in div.
= 0.05 div for HF REJ trigger coupling.
= 0.1 div for DC trigger coupling, 5 mV to 5 V sensitivity.
= 0.15 div for DC trigger coupling, 2 mV sensitivity.
e
n
= reference signal rms noise in div.
2465B/2455B/2445B Operators
6-33