Tektronix 1910 - Digital Input Interface

Specification-1910 Operators
Table 1-8
DIGITAL INPUT INTERFACE
Performance
Supplemental Perf. Ck.
Characteristics Requirements
Information Step. No.
Digital Format
Parallel,
12 balanced signal pairs
consisting of 10 data bits per
sample, a clock, and a timing
reference signal.
Encoding Format
Positive binary
Sampling Frequency
I
4 times color subcarrier. Nominally
14.31818 MHz
Sampling Phase Angle
Referenced to I and
Q axis.
I
,
Input logic Levels
High:
-1.10 to -0.81 V At 25°C.
Terminated in 100
g Low: -1.85 to -1.48 V
10K
ECl compatible.
Dynamic Range
!
10 bits/sample Blanking level (0 IRE) is at digital word
240.
Reference white (100
IRE) is at digital
word 800 (5.6 LSB/IRE).
Setup Time Data needs to
be valid at least 10 ns
before the 50% point of the negative
transition
of the clock pulse.
Hold Time
Data needs to
be valid for at least
10 ns after the
50% point of the
negative transition of the clock pulse.
1-36