Tektronix 1910 User manual

1910
Digital Generator
Operator Manual
070-4466-01
Please check for change information at the rear
of this manual.
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1910 Operators
(A) Rackmount Version.
(B) Cabinet Version_
Fig. 1-1. The 1910 Digital Generator.
viii

Section 1-1910 Operators
SPECIFICATION
INTRODUCTION
Reference Documentation
The following documents were used as references in the
preparation of this Operators Manual.
UL
1244-Standard for Electrical and Electronics Mea-
suring and Testing Equipment.
FCC Rules and Regulations, Section 73,676(f) and Fig-
ures 13, 14, and 15 of Section 73.699 for Remote Con-
trol Monitoring of Television Broadcast Transmitters.
RS-170A-Color Television Studio Picture Line Amplifier
Output.
RS-189 EIA
STANDARD-Encoded Color Bar Signals.
RS-232-C EIA
STANDARD-Interface Between Data
Terminal Equipment and Data Communications Equip-
ment Employing Serial Binary Data Interchange.
Proposed SM
PTE Standard for aComposite Parallel
Digital Video Interface.
ANSI
Yl.1-1972, Abbreviations.
Product Description
The TEKTRONIX 1910 DIGITAL GENERATOR (see Fig.
1-1) is ahigh quality test instrument capable
of providing a
variety of test signals useful for testing NTSC video systems
or discrete parts of the systems. The test signals generated
are available from the FULL FIELD OUTPUT
as field in-
formation. Also, most of the test signals are available as
Vertical Interval Test Signals
(V ITS) inserted on the incom-
ing Program Line Signal.
Anon-volatile memory maintains selected VITS and Full
Field Signals after apower-line interruption. There is aprovi-
sion for insertion of up to four external VITS for such ser-
vices as Teletext and closed captioning. If external VITS is
not needed, this provision can
be replaced with aPulse Out-
put board that provides four signals: HDrive, VDrive, Comp
Blanking. and Burst Flag.
The test signals generated by the 1910
are derived from
information stored
in sets of PROMs. This provides several
advantages. Test signal format changes are accomplished
by replacing the appropriate test signal memory. No
recalibration
is required and changing industry test signal
standards will not cause absolescence. The other advan-
tage is the exceptional stability
of the test signals. This sta-
bility means that very little maintenance and recalibration is
required.
The 1910 test signals may be genlocked1
to the incoming
Program Signal
or to aBlack Burst master generator, thus
assuring accurate timing and phasing of the
output signal. In
the absence
of burst, the 1910 locks to the leading edge of
sync. Afront.panel light will illuminate upon loss of sync,
indicating afree-running state
of the instrument's oscillator.
In the free-running state the 1910 oscillator is controlled by
acrystal
in aconstant-temperature oven.
The signals generated by the
191 0are programmed to
be SCH (subcarrier-to-horizontal sync) phase referenced.
Because
of this it is not recommended to genlock the 1910
with asignal where sync and burst are non-synchronous.
The 1910 Digital Generator has remote-control capabili-
ties for some
of its functions. The remote-control capabili-
ties may be utilized by either the REMOTE CONTROL
interface
or the RS-232 CONTROL interface on the rear
panel. The 1910 is compatible with other instruments that
have RS-232 interface; some examples are: TEKTRONIX
4006 Computer Display Terminal, TEKTRONIX 4010 Com-
puter Display Terminal, TEKTRONIX 4052 Desktop Com-
puter,
and TEKTRONIX 1980 ANSWER. (Some hand-held
computers and personal
or home computers may be com-
patible with the 1910 RS-232 CONTROL port.)
The 1910 will also accept digital information from an ex-
ternal source through the DIGITAL INPUT connector
to gen-
erate test signals. ADIGITAL OUTPUT connector provides
access to the 1
O-bit words that are being used to generate
the Full Field Signals.
1Synchronization of signal in both frequency and phase.
1-1

Specification-1910 Operators
SPECIFICATION
The performance requirements listed here apply over an
ambient temperature range
of OCC to +50°C after awarm-
up time
of 20 minutes. The rated accuracies are valid when
this instrument is calibrated at
+20°C to +30
cCafter a
warm-up time of ten minutes minimum.
Test equipment used
in verifying performance require-
ments must
be calibrated and working within the limits spec-
ified under
Table 3-1, Recommended Test Equipment,
provided
in Section 3. Performance Check Procedure, of the
Service Manual.
Items listed
in the Performance Requirements column of
the Electrical Characteristics tables are verified by complet-
ing the Performance Check
in Section 3of the Service Man-
ual, unless specifically stated otherwise. Items listed
in the
Supplemental Information column may not
be verified in ei-
ther manual; they are either explanatory notes
or perfor-
mance characteristics for which
no limits are specified.
The Performance Check Step
No. column lists the spe-
cific step number
of the Performance Check procedure in
Section 3 of the Service Manual that checks the appropriate
Performance Requirement items.
Table 1-1
PROGRAM SIGNAL PATH/VITS INSERTER
Performance Supplemental Perf. Ck.
Characteristics Requirements Information Step. No.
Program Line Input
Input Level 1V(0.7 to 1.4
V)
Input Impedance 75 Qnominal 53
Return Loss
Power
On
At least 46 dB to 5MHz 53
Power Off/Bypass At least 40
dB to 5MHz 53
Program Line Out
Program Monitor Out
Impedance
75 Qnominal 53
Return Loss At least 36
dB to 5MHz 53
Hum Rejection At least 10 dB. Jumper selectable to
20 dB. 15
ReferenCed
to 1Vhum. ReqUires unique test equip-
ment capable of inserting 1V
hum on the program
line.
Keyboard (no noise) Less than 0.25 IRE 9
Video Gain Unity Gain ±0.5% 1
DC Blanking Output Level oV ±100 mV 8
VITS Pedestal Offset
from Blanking
OV Hum
2 mV or less 10
1V
Hum 10 rnV or less Requires unique test equip-
ment capable
of inserting 1V
hum on the program
line.
1-2

Table 1-1 (cont)
Specification-1910 Operators
Performance
Supplemental Perf. Ck.
Characteristics Requirements
Information Step. No.
Isolation
Program Line
to At least 40 dB to 5MHz ReferenCed to 1V 2
Program Monitor
Pulse-to-Bar Ratio
T/2 100%
±2%
3
T100%
±0.5%
3
2T
100% ±0.25%
3
Pulse
and Bar
Aberrations
T/2
2% or less 4
T0.5% or less 4
2T 0.25%
or less 4
Waveform Tilt
Field Tilt 0.5%
or less 5
(Field Rate Square
Wave)
Bar Tilt 0.5% or less 5
(251-'s Bar)
Differential Phase 0.15°
or less 22
(10-90 APL)
Differential Gain 0.2% or less 23
(10-90 APL)
Inserted VITS
Differential Phase 0.4°
or less
Differential Gain 0.7% or less
Amplitude Nonlinearity 0.25%
or less 6
Frequency Response
±0.5% to 5MHz
11
±1%t010MHz
±3% to 15 MHz
Random Noise Output At least 75 dB (rms) down Referenced to 1
V.
18
5 MHz low-pass filter and a
noise weighting filter into a
mns meter.
Residual Subcarrier At least 60
dB down Referenced to 1V. 12
5
MHz low-pass filter into an
oscilloscope.
Hum
At least 60 dB down Referenced to 1
V.
16
5
MHz low-pass filter into an
oscilloscope.
1-3

Specification-1910 Operators
Table 1-1
(cont)
Performance
Supplemental Perf. Ck.
Characteristics
Requirements
Information Step. No.
Spurious Signals
During Blanking
Up to 5MHz At least 40
dB down (10 mV or less) Insertion transient 17
Above 5MHz At least 46
dB down (5 mV or less) Clock noise 17
Delete Mode Signal
Attenuation
2T Pulse At least
70 dB down Referenced to 0.714 V14
Subcarrier At least
60 dB down Referenced to 0.714 V14
Crosstalk (Internal to
Program Un e)
2T At least 70
dB down Referenced to 0.714 V13
Subcarrier At least
60 dB down Referenced to 0.714 V13
Insert Delay Range ±8P.S, (16
p'S total)
In 70 ns increments 19
(internal DIP switch)
INSERT SUBCARRIER Minimum 10° total Continuously adjustable over
21
PHASE ADJUST RANGE 70 ns (internally)
Instrument Delay 25 ns typical. Input
to output
delay.
Insertion Width 9.8 p'S ±100 ns
to 10.9 J,LS ± 100 ns Front Porch (jumper 20
selectable): 1.6 p'S to 1.32 p'S
nominal.
Back Porch (jumper
selectable): 8.46
J,LS, 8.74 p'S,
9.02 J,LS, or 9.3 J,LS nominal.
1-4

Table 1·2
GENLOCK FUNCTION
Specification-1910 Operators
Performance
Supplemental Perf. Ck.
Characteristics
Requirements
Information Step No.
Genlock Input (via PRO-
GRAM
IN or BLACK BURST
IN)
Burst Amplitude 40 IRE
±6 dB 25
Phase Change with For 10or less phase change
APL over 10% to 90% APL.
Sync Amplitude 40 IRE
±6 dB
25
Return Loss
BLACK BURST
IN
At least 46 dB to 5 MHz
53
Genlock Performance
Burst Lock 3.579545
MHz ±20 Hz 0.00056%
If Burst Not Present Clock is referenced
to leading edge
of sync.
Sync Lock 15.73426
kHz ±0.079 Hz Requires unique test equipment
capable of measuring 0.079
Hz
sync frequency offset.
If Sync and Burst Clock is referenced to
Not Present temperature-controlled crystal
oscillator.
Oscillator
(Free Running)
Subcarrier Frequency 3.579545
MHz ± 10Hz Digitally derived 26
from 14.3 MHz clock.
Sync Frequency 15.73426 kHz
±0.04 Hz Digitally derived from 14.3 MHz
clock. Locked to subcarrier by
455/2 ratio.
Jitter 5ns or less
27
1-5

Specification-1910 Operators
Table 1·3
EXTERNAL VITS INPUT
Performance Supplemental Perf. Ck.
Characteristics Requirements Information Step No.
Maximum Input ±1Vpeak
Ac plus dc.
Input Impedance 75 nnominal
Return Loss
At least 40 dB to 5MHz Power on and off. 53
Insertion Level
±5mV
Referenced to External VITS
42
In blanking level.
Insertion Gain Unity ±1%
43
Frequency Response Flat within 1% to 5MHz
-3dBat8MHz
44
Pulse-to-Bar Ratio
2T
100% ±1% 45
T100
±2% 45
Pulse and Bar Aberrations
2T Less than 0.5%
45
TLess than 1%
45
Differential Phase 0.5 0
or less 10 to 90% APL. Blanking at
OVdc.
48
Differential Gain 0.5% or less 10 to 90% APL. Blanking at
OVdc.
49
Amplitude Non-linearity 0.5%
or less 47
Line-Time Tilt
1% or less 46
External Input Isolation Greater than 60 dB to 5 MHz
50
Switching Transients Less than 10 mY p-p to 5 MHz (Switching transient at insertion
51
time.)
Less than 5mY above 5
MHz
(Generator clock noise.) 51
1-6 Revised JUL 1984

Table 1-4
TEST
SIGNALS-FULL FIELD &VITS
Specification-1910 Operators
Performance
Supplemental Perf. Ck.
Characteristics Requirements Information Step. No.
AC BOUNCE oto 100 IRE on 4
out of 5lines Refer to FIELD SO WAVE ?
Amplitude specification.
Bounce Frequency Adjustable from approximately 1
Hz to ?
greater than 1/30 Hz.
BOUNCE &
APL Selected full-field signal on one
line with the Bounce
or APL sig-
nal on the next four lines.
Amplitude 100
IRE ±O.? IRE 28
Rise Time 250
ns ±25 ns
Line Timing
See Fig. 1-2A.
FIELD SO
WAVE
Field Timing
Lines (White) Lines
72 to 202
Lines at Blanking
All remaining active lines.
Field Tilt 0.5% maximum 34
Line Tilt 0.5% maximum 33
Amplitude 100
IRE ±O.l IRE 28
Rise Time 250
ns ±25 ns
Line Timing
See Fig. 1-2A.
WINDOW/FIELD BAR
White Bar Amplitude 100
IRE ±O.? IRE
Rise Time 250
ns ±25 ns
Field Tilt 0.5% maximum
Line Tilt 0.5% maximum
Field Timing Lines
72 to 202 Window only
Line Timing
See Fig. 1-2B.
FCC MULTIBURSTI
MULTIBURST 100
White Reference 100 IRE ±0.7 IRE
Bar Amplitude
Rise Time 250
ns ±25 ns
Multiburst Packets
FCC MB MB 100
Amplitude 60 IRE. ±1IRE.
100 IRE ±2 IRE.
pop
p-p
Average Level 40 IRE ± 1 IRE 50 IRE ±1 IRE
1-7

Specification-1910 Operators
Table 1-4 (cant)
Perlormance Supplemental Perl. Ck.
Characteristics Requirements Information
Step. No.
Frequencies 500 kHz Digitally derived from
1.25 MHz 14.3 MHz clock.
2.0 MHz
3.0 MHz
3.58 MHz
4.1 MHz
Packet Rise Time The packets are envelope shaped.
500 kHz 140
ns ±14 ns
The Remaining 400
ns ±40 ns
Hanmonic Content At least 40
dB down
Line Timing
See Fig. 1-2C.
MULTIPULSE 70/1 00
70
70 IRE ±0.7 IRE white reference bar.
10
IRE ±0.5 IRE pedestal level.
100 100 IRE
zO.7 IRE white reference bar.
No pedestal.
70 and 100
Rise Time 250
ns ±25 ns
Pulse-to-Bar Ratio 100% ±
1%
Pulse Half Amplitude
Duration
2T HAD 250
ns ±25 ns
25T HAD 3.14
j.LS ±0.3 j.LS
12.5T HAD 1
.57 j.LS ±150 ns
Modulated Pulse
Frequencies
MP 70 MP 100
1st Pulse 1.25 MHz 1.0 MHz The first pulse HAD is 25T,
and the remaining pulse
2nd Pulse 2MHz 2MHz HADs are 12.5T.
3rd Pulse 3MHz 3MHz
4th Pulse 3.58 MHz 3.58 MHz All pulses are digitally derived
from 14.3
MHz clock.
5th Pulse
4.1 MHz 4.2 MHz
Group Delay 10
ns or less
31
Other Perturbations
0.5 IRE or less.
on Baseline
Line Timing
See Figs. 1-2D and 1-2E.
1-8

Table 1-4 (cont)
Specification-1910 Operators
Performance Supplemental IPerf. Ck.
Characteristics Requirements Information Step. No.
COLOR MULTIPULSE
White Reference Bar
Amplitude 100 IRE ±0.7
IRE
Rise Time 250 ns ±
25 ns
Pulse-to-Bar Ratio
1:1 ±1%
Pulse Half Amplitude I
Duration
2T HAD 250 ns
±25 ns
12.5T HAD 1.571'5
±150ns
Modulated Pulse
Frequencies
1st 2.379545 MHz
2nd 2.679545 MHz
3rd 2.979545 MHz HAD for all modulated pulses
is 12.5T.
4th 3.279545 MHz
5th 3.579545 MHz All pulses digitally derived
from 14.3 MHz clock.
6th 3.879545 MHz
7th 4.179545 MHz Phase of the 5th pulse
8th 4.479545 MHz is 327 0
•
9th 4.779545 MHz
Group Delay 10 ns
or less
31
Other Baseline 0.5 IRE
or less
Perturbations
Line Timing See Fig. 1-2F.
SPECIAL MULTIPULSE This signal occupies two
adjacent television lines.
White Reference Bar
Amplitude 100 IRE ±0.7
IRE
Rise Time 250 ns ±25 ns
Pulse-to-Bar Ratio
1:1 ± 1% for pulses to 5 MHz
30
1-9

Specification-1910 Operators
Table 1-4 (cont)
Performance iSupplemental Perf. Ck.
I
!
Characteristics Requirements iInformation Step. No.
I
5.5 MHz Typically
-3%.
6.0 MHz Typically
-7.5%.
Pulse Half Amplitude
Duration
2T HAD
250 ns =25 ns
12.5T HAD 1.5
JJ.s =150 ns
25T HAD 3.14
f./.S :::0.3 f./.S
Modulated Pulse
Frequencies
First Line
1st Pulse 1.0 MHz First
two pulses are 25T HAD.
2nd Pulse 1.5 MHz
Last three pulses are 12.5T HAD.
3rd Pulse 2.0 MHz
4th Pulse 2.5 MHz All pulses are digitally derived
from 14.3 MHz clock.
5th Pulse 3.0 MHz
Second Line
1st Pulse 3.5 MHz All pulses are 12.5T HAD
and digitally derived.
2nd Pulse 4.0 MHz
3rd Pulse 4.5 MHz
4th Pulse
5.0 MHz
5th Pulse 5.5 MHz
6th Pulse 6.0 MHz
Graup Delay 10
ns ar less far pulses of 5MHz 31
or less.
5.5 MHz Pulse 20
ns typical.
6.0 MHz Pulse 100
ns typical.
Line Timing See Fig. 1-3A.
1-10

Table 1·4 (cont)
Specification-1910 Operators
Performance Supplemental Perf. Ck.
Characteristics Requirements Information Step. No.
COLOR BARS
Luminance and Absolute amplitudes
of luminance sig-
Chrominance nal, setup, and sync are within 1%or
1.5 mY, whichever is greater,
with re-
spect to blanking.
Chrominance amplitudes are within 1%
of their given
value.
75% Amplitude, LUM CHROMA
poP
Phase
7.5% Setup (mV) (mV) (degrees)
Full Field &SMPTE
BARS
White 714.3 1.0 or less
Gray 549.1 1.0 or less
Yellow 494.6 444.2 167.1
Cyan 400.4
630.1 283.4
Green 345.9 588.5 240.8
Magenta 256.7 588.5 60.8
Red 202.2
630.1 103.4
Blue 108.1 444.2 347.1
Full Field Black 53.6 1.0
or less
lyaB
-I
53.6 285.7 303.0
lyaS
White Ref 714.3 1.0 or less
Iyas
a53.6 285.7 33.0
Iyas
+Pluge
82.1
Iyas
-Pluge
25.0
Luminance Rise Time
Full Field 250 ns
±25 ns
SMPTE 140 ns ±15 ns
1-11

Specification-1910 Operators
Table 1-4 (cont)
Performance
Supplemental
Perf. Ck.
Characteristics
Requirements Information Step. No.
Chrominance Rise Time
-I
250 ns :::25 ns
a833 ns
=80 ns
All Others 400 ns
:t 40 ns
Bar Duration
Full Field 6.5 /-,s/bar (8 bars).
SMPTE 7.5 /-,s/bar
(7 bars).
Time Difference Between
20 ns or less
Luminance and
Chrominance
Residual Subcarrier At least 52
dB below 1VWhite, 40
Black
Spurious Subcarrier At least 52
dB below 1V
Other Spurious Outputs At least 52
dB below 1 V,
41
except 40 dB for 2nd harmonic
Field Timing
FULL FIELD
241 lines per field.
COLOR BARS
BARS/Y (Full Field Modulated bars first
181 active lines
Color Bars) per field; unmodulated bars last 60
lines
of the field.
BARS/RED (Full Field Same as
for BARS/Y except last 60
Color Bars) lines
of the field are red.
SMPTE BARS
EIA Color Bars first 161 active lines
per field; Reverse Blue Bars for 20
lines; and
lyaB with Pluge for the
last 60 lines
of field.
Line Timing
FULL FIELD See Fig. 1-3B.
COLOR BARS
1-12

Table 1-4 (cont)
Specification-1910 Operators
Performance
!
Supplemental
Perf. Ck.
Characteristics Requirements
Information Step. No.
Color Bars for See Fig. 1-3C. I
SMPTE BARS or
EIA COLOR BARS
IYQS
See Fig. 1-3D.
REVERSE
BLUE
See Fig. 1-3E
BARS
RED FIELD
Luminance
Amplitude
202.2 mV, ± 1% or 1.5 mV, NOTE: These electrical
whichever is greater, with respect characteristics are the same as
to blanking.
for red color bar.
Rise Time
250 ns ±25 ns
Chrominance
Amplitude 630.1 mV
±1%
Phase 103.4° ±0.3°
Rise Time 400 ns ±40 ns
Duration 51.9/LS
Line Timing See Fig. 1-4A.
FCC/NTC 7
COMPOSITE
Modulated 5-step
Staircase
Luminance
Amplitude
FCC
80.4 IRE ±0.7 IRE
NTC 790.2 IRE ±0.7 IRE
Riser Amplitude
1/5 of 5-step amplitude ±0.5%
Rise Time
250ns ±25 ns
1-13

Specification-1910 Operators
Table 1-4 (cont)
Performance
Supplemental
Perf. Ck.
Characteristics Requirements
Information
Step. No.
Chrominance
Phase Same as burst
::=0.3°
Amplitude 40 IRE ±0.5
IRE (3.6 mV)
Inherent Diff Gain 0.6% or less 38
Inherent Diff Phase 0.3 0
or less 37
Envelope Rise Time
FCC
375 ns ±37.5 ns
NTC 7400 ns ±40 ns
2T Pulse
Pulse-to-Bar Ratio
100% ±0.5%
30
Half Amplitude 250 ns
::=25 ns
Duration (HAD)
Ringing 1.0 IRE or less 36
Modulated Sine-
Squared
Pulse
Pulse-to-Bar 100% ±0.5%
Peak Amplitude
Half Amplitude 1.563
JLS ±150 ns
Duration (HAD)
Chrominance-to- 10 ns
or less
Luminance Delay
Chrominance-to-
±0.5 IRE (±1%)
Luminance Gain
Inequality (RCL)
Other Perturbations 0.5 IRE
or less
on Baseline
Harmonic Distortion
At least 40 dB down
41
of Subcarrier
Phase 60.8° ±
1"
1-14

Table 1-4 (cont)
Specification-1910 Operators
Performance
Supplemental Perf. Ck.
Characteristics Requirements
Information
Step. No.
Bar
Amplitude 100 IRE
±0.7 IRE
Rise Time I
FCC 250 ns ±25 ns
NTC 7125 ns ±15 ns
Line Timing
FCC See
Fig. 1-4B.
NTC 7See
Fig 1-4C.
MODULATED BAR
White Reference Bar
Amplitude 100 IRE
±0.7 IRE
Rise Time 250
ns ±25 ns
Pulse-to-Bar 1:1 ±1%
Pulse Half Amplitude
Duration
12.5 HAD 1.57 j.lS ±180
ns
2T HAD 250 ns :!:25 ns
12.5 Modulated Pulse
Frequency 3.579545 MHz Digitally derived from 14.3 MHz
clock.
Phase 327 0=10
Modulated Bar
Chrominance
Amplitude 100 IRE
±1 IRE
Rise Time 1.56
IJ.S ±100 ns
Frequency 3.579545 MHz Digitally derived from 14.3 MHz
clock.
1-15

Specification-1910 Operators
Table 1-4 (cont)
IPrf Ck
tI
S
P rf
e ormance
upp emen ae.
Characteristics Requirements
Information Step. No.
Phase
33° ±10
Luminance Amplitude 50 IRE ±O.S IRE
Group Delay Equal
to or less than 10 ns
Baseline Perturbations 0.5 IRE or less
Line Timing See Fig. 1-4D.
INVERTED PULSE &BAR
I
Reference Bar
I
Amplitude 100 IRE
±0.7 IRE
Rise Time 250 ns ±25 ns
Pulse-to-Bar Ratio
1:1 ±1%
2T Pulse HAD 250
ns ±25 ns
Baseline Perturbations 0.5 IRE or less
Timing See Fig. 1-4E.
VIRS (Vertical Interval
Reference Signal)
Chrominance
Reference
Amplitude
40 IRE ±OA IRE
Phase
Same as burst ±0.3 0
Envelope Rise Time 1 !J.s ±100 ns
I
Time (Sine-squared
shaped)
Average Level of
70 IRE ±0.7 IRE
Chromlnance Signal
Luminance Reference
50 IRE Level
50 IRE ±O.S IRE
Black Reference 7.5 IRE ±0.5 IRE
Line Timing See Fig. 1-4F.
1-16

GCR (Ghost Cancellation
Reference) for Options
See individual Appendix sections.

Specification-1910 Operators
Table 1-4 (cont)
Performance
Supplemental
Perf. Ck.
Characteristics Requirements
Information Step. No.
MOD
PED (Modulated
Pedestal)
Pedestal
Amplitude
50 IRE ± 0.5 IRE
Rise Time 250 ns
±25 ns
Tilt 0.5% or less
Chrominance
Amplitudes
20 IRE 20.01 IRE p-p, ±0.5 IRE
40 IRE 40.02 IRE p-p,
±0.5 IRE
80 IRE 80.04 IRE p-p. ::to.5 IRE
Phase
Relative
to Burst 900within 0.3
0
Relative to 00within 0.5
0
I
the Other Two
Harmonic Distortion At least 40 dB down :
I
Rise Time 400 ns ::t40 ns
!
i
I
Line Timing See Fig. 1-5C.
5-STEP STAIRCASE,
MODULATED 5STEP
Luminance
Amplitude 100 IRE ::to.? IRE
Linearity
::t 0.5% of total amplitude Any step amplitude will match 29
any other by 0.5 IRE.
Rise Time 250 ns ::t25 ns
Chrominance
5-STEP STAIRCASE No modulation
1-18