Tektronix TG8000 User Manual

SDI7 Dual Channel SD/HD/3G SDI Video Generator module
Therateofthep
ixel clock depends on the format of the signal selected as the
trigger source (channel 1 or channel 2):
27 MHz for SD formats
74.25 or 74.18 MHz for HD formats and most 3G formats (where 74.25 MHz
is for integer frame rates and 74.18 MHz is for non-integer frame rates such
as 59.94, 29.97, and 23.98 fps)
148.5 MHz or 148.35 MHz for 3G fast progressive formats such as 60p,
59.94p and 50p
Frame / Field Pulse. The trigger pulse is produced at the field or frame rate of
the video signal. In interlaced and segmented-frame formats, this produces a
frame-rate square wave that is low during fieldoneandhighduringfield two.
In progressive formats the ou
tput is high during the vertical blanking period,
producing a field-rate pulse.
1
When this menu item is displayed, u se the left (◄)orright(►) arrow button to
select a different clock.
Line Pulse. The trigger pulse output is h igh during the horizontal blanking period,
producing a line-rate pulse.
1
When this menu item is displayed, u se the left (◄)orright(►) arrow button to
select a different clock.
1
The Frame/Field Pulse and Line Pulse signals are derived from the EAV and SAV XYZ byte H, V, and F bits,
just prior to the parallel data entering the serializer; therefore these pulses can be used to approximate the
signal timing.
SDI7 module
DIAGNOSTICS su bmenu
Use this menu to view operation parameters for the SDI7 module. Module
diagnostics provide status information only and do not affect operating behavior.
The following figure shows the DIAGNOSTICS submenu. (Se
e Figure 3-142.)
NOTE. The SDI7 module provides additional diagnostics for checking the DDR2
and SRAM memory that can be accessed only in factory mode. See the TG8000
Service Manual for information on using the factory mode.
PLL STATUS. This diagnostic displays the following:
Flex0–Ind
icates the state of the flexible clock generator for output channel 1
(SIGNAL 1A and SIGNAL 1B connectors). This readout should show Lock
(locked). An Unlk (unlocked) reading might indicate a problem with the
module or mainframe.
Flex1 – Indicates the state of the flexible clock generator for output channel 2
(SIGNAL 2A and SIGNAL 2B connectors). This readout should show Lock
(locked). An Unlk (unlocked) reading might indicate a problem with the
module or mainframe.
TG8000 Multiformat Test Signal Generator User Manual 3–333

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English