Tektronix SPG8000A
Master Sync/Master Clock Reference Generator.
The SPG8000A is a precision multiformat video signal generator, suitable for master synchronization and reference applications. It provides
multiple video reference signals, such as blackburst, HD tri-level sync,
and serial digital and composite analog test patterns, and it provides time
reference signals such as timecode, NTP (Network Time Protocol) and
IEEE 1588 Precision Time Protocol (PTP).
Kirjeldus
Reference input
Connector: BNC ×2, passive loop-through
Input impedance: 75 Ω
Input signal: NTSC/PAL black burst
HD tri-level sync:
1080/60/59.94/50I
1080/30/29.97/25/24/23.98P
1080/24/23.98PsF
720/60/59.94/50P
10 MHz continuous wave
Amplitude range: −8 dB to +6 dB
S/N ratio: >40 dB
SCH phase 0 ±40°
Return loss: ≥30 dB at 300 kHz to 10 MHz
Lock stability: ±3 dB amplitude change <1 ns
Jitter with burst loc: <0.5°
Jitter with sync lock: <1 ns
Jitter with CW lock: <1 ns (typ. 1°)
Genlock
Timing adjustment range: Anywhere in the color frame
Timing adjustment resolution: <0.5° of NTSC/PAL subcarrier, 1 ns with tri-level sync input
Color framing: Keeps accuracy even with ±45° SCH error of input reference signal
Genlock tune range: ±7.5 × 10-6
GPS / GLONASS receiver (Option GPS) Type: L1 frequency (GPS – 1575.42 MHz, GLONASS – 1602.00 MHz), C/A Code, 32 channels
Time accuracy: Within 150 ns to GPS/GLONASS/UTC
Acquisition time: 2 minutes on boot up with warm oven, good satellite signal, and known position
GPS / GLONASS antenna input (Option GPS)
Connector: BNC
Input impedance: 50 Ω, internally terminated
DC antenna power output voltage: 3.3 V or 5 V at 55 mA
Fault protection: Short-circuit/open detection and protection
Return loss: 8 dB at 1575 MHz
Time reference
Source: GPS or GLONASS signal, PTP input, LTC input, VITC read from NTSC/PAL genlock input, or can enter manually
Time zone offset: −23:59 to +23:59
Daylight saving adjustment: Start/end from recurring calendar or manually scheduled, with adjustable offset
Leap second adjustment: Inserted at 00:00 UTC on the scheduled date, or deferred up to 24 hours
LTC input
Connector Available through D-sub 15-pin connector; Optional break-out cable to XLR connector available
Formats: 24 fps (24 Hz or 23.98 Hz), 25 fps, 30 fps, 30 fps drop-frame (29.97 Hz) per SMPTE 12M
Timing to video: Compliant with SMPTE 12M and continues to operate over at least 90% of possible timing range
Signal voltage range: 0.5 to 10 Vp-p differential, 1 to 5 Vp-p single ended
Noise tolerance: –30 dB SNR RMS white noise with 10 kHz BW to the p-p signal level, or –10 dB SNR for 5 MHz white noise
Hum tolerance: 0 dB hum-to-signal ratio
Error immunity: 100 consecutive frames with consistent time code must be detected for time to be considered valid
Input impedance: Nominal 600 Ω differential, 300 Ω single ended