Features & Benefits
- Multiple
independent black burst and HD tri-level sync outputs provide all
the video reference signals required in a video broadcast or production
facility
- Four LTC outputs, VITC on black burst outputs,
and NTP server provide time reference signals in a variety of formats
- GPS-based synchronization gives an accurate time-of-day
reference and deterministic video phase reference, and locks remote
SPG8000 systems to each other
- Stay GenLock® and GPS Holdover Recovery prevent synchronization shock when the
external reference input or GPS signal is temporarily lost
- Wide selection of video test patterns in serial digital formats
(SD, HD and 3G-SDI) and composite analog formats (NTSC and PAL)
- Dual hot-swappable power supplies ensure continuous availability
of reference signals
- Easy to manage with Web-based interface
for remote configuration and SNMP for status and alert information
Applications
- Sync pulse generator
and time reference generator for broadcast, studio, mobile, and post-production
facilities
- Master or slave (genlock) operation for distributed
system architectures
- Video equipment verification, facility
link testing, and display calibration
Master Video Synchronization and Time Reference Generator
The SPG8000 is a precision multiformat video signal generator,
suitable for master synchronization and reference applications. It
provides multiple video reference signals, such as black burst, HD
tri-level sync, and serial digital and composite analog test patterns,
and it provides time reference signals such as time code and NTP (Network
Time Protocol).
The base configuration includes three sync
outputs that can be configured with independent output formats (NTSC/PAL
black burst and/or HD tri-level sync) and independently adjustable
timing offsets. With the BG option, four more analog outputs can be
added. A high-accuracy, oven-controlled crystal oscillator provides
a stable frequency reference for the system, or the pass-through genlock
input can be used to lock to an external video reference or 10 MHz
continuous wave signal. The SPG8000’s Stay GenLock® feature
avoids “synchronization shock” if the external reference suffers a
temporary disturbance, by maintaining the frequency and phase of each
output signal. When the external reference is restored, Stay GenLock® ensures that any accumulated clock drift is removed by slowly
adjusting the system clock within standard limits instead of “jamming”
back to the correct phase.
Time reference outputs are available
in multiple formats. Three independent linear time code (LTC) outputs
are available, and a fourth LTC connection can be used as input or
output. Each LTC output has independent frame rate selection, time
source (time-of-day or program time) and time zone offset. Vertical
interval time code (VITC) is available on each NTSC or PAL black output,
also with independent time sources and offsets. The SPG8000 can also
serve as a Network Time Protocol (NTP) server, providing the time-of-day
reference to network-attached devices.
SPG8000 Master Sync / Clock Reference
Generator front panel and back panel.
Optional GPS Receiver
The GPS option adds an internal
GPS receiver to the SPG8000. When connected to an external antenna
that supplies the standard GPS RF signal, the SPG8000 can utilize
the GPS system’s stable frequency reference. The GPS signal also includes
a precise time-of-day reference that can be used for all time code
outputs. Similar to the Stay GenLock® feature, the SPG8000
can maintain the video frequency and phase when the GPS signal is
interrupted, and the Holdover Recovery mode will ensure a shock-free
re-alignment of frequency and phase when the GPS signal is restored.
Test Signal Outputs
The SPG8000 can be optionally
configured with a variety of test signal outputs. Option BG includes
two composite analog outputs (NTSC or PAL) that can be used to generate
test patterns such as color bars, or serve as additional black burst
outputs. Option SDI adds two fully independent serial digital video
generator channels of two outputs each. Each channel can be configured
to any standard SD or HD-SDI format and frame rate. The selected test
pattern can be generated on both outputs per channel, or one output
can generate digital black. Option 3G extends the functionality of
the SDI test signal outputs by adding 3 Gb/s SDI formats. A wide variety
of standard test patterns are included, such as color bars, convergence
grid, step scales, ramps, multiburst, SDI pathological test matrix
and a real-time programmable zone plate generator. Bitmap images can
be downloaded to the SPG8000’s flash memory for arbitrary user-defined
test patterns. ID text, burn-in time code, circle, and color logo
overlays can be added to any test pattern, and several ancillary data
packet types, including ancillary time code and user-defined packets,
can be inserted into the SDI output signal.
Audio Reference
Signals
Several audio reference signals are available on
the SPG8000. The base configuration includes a 48 kHz word clock output,
and option AG adds five AES/EBU output pairs. One pair is dedicated
to a Digital Audio Reference Signal (DARS) output, and the other four
pairs are used for test tone generation, with independent tone frequency
and amplitude settings for each of the 8 channels. Audio tone generation
is also included with the SDI option, as embedded audio on each of
the SDI outputs.
Remote Access
The SPG8000 includes
a 10/100/1000BASE-T Ethernet interface for remote access to the instrument.
A web-based user interface can be used for all configuration settings
and for monitoring system status. Alarm and key status information
is also available via Simple Network Management Protocol (SNMP) messaging,
enabling easy integration with network management systems. Remote
control and alarm reporting is also available via a general purpose
interface (GPI). The SPG8000 has a front-panel USB port that can be
used to backup and restore presets and other user data, and to perform
system firmware upgrades.
Optional Backup Power Supply
For mission-critical applications, the SPG8000 can be configured
with a second power supply module. Under normal operation, the designated
backup supply is seldom used, ensuring that it has maximum remaining
life should the primary supply fail. The backup supply is load-tested
once each day to verify that it can serve as the primary supply if
necessary. The usage time of each supply is logged as “temperature-weighted
hours”, a metric that best estimates the calculated life of the supply.
A front-panel LED will indicate when the supply is nearing its end-of-life.
If the primary supply is interrupted for any reason, the system will
switch to the backup without any disruption to system operation. Power
supply modules are hot-swappable for easy replacement, and feature
a locking mechanism to prevent the power cable from accidental disconnection.