Tektronix Tektronix SPG8000, Техническое описание

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Speci fi cations
Table 6: Genlock, VITC and LTC input
Characteristic Performance requirements
Genlock input type Two 75 Ω BNC connectors; passive loop through
Genlock input formats Bi-Level NTSC, NTSC with SMPTE318 10 fi eld fl ag, PAL; Tri-level HD 1080i59.94, 1080i50,
720p59.94, 720p60, 1080p23.98, 1080p24. 1080p29.97, 1080p30, 1080p25; CW 10 MHz
Genlock input video signal level
range, typical -8 to +6 dB with nominal operation
Genlock input CW signal level
range, typical 0.5 to 2 V
p-p
signal
Genlock input DC tolerance +5 V max or damage may occur
Genlock hum tolerance -3 dB of 50 or 60 Hz hum
Genlock white noise tolerance -33 dB Min SNR of 5 MHz BW noise
Genlock SCH tolerance +40 deg
Genlock return loss, typical ≥ 30 dB from 300 kHz to 10 MHz
Jitter in NTSC and PAL Burst Lock,
typical <0.5° with ±3 dB amplitude change and >40 dB S/N ratio
Jitter in Tri- level Sync Lock, typical <1 ns with ±3 dB amplitude change and >40 dB S/N ratio
Jitter in CW Lock, typical <1 ns with 1 V
p-p
±3 dB amplitude change and >40 dB S/N ratio
LTC input LTC1 output can be con fi gured as an input
LTC input – formats supported 23.98, 24, 25, 29.97 drop frame, and 30 Hz
LTC input – timing to video To correctly associate the LTC with a given video frame, the LTC start bit should be from 32 μ s
before to 160 μ s after the start of the fi rst broad pulse in vertical blanking of a compatible frame
rate being used as the genlock input. This is as speci fi ed in SMPTE12M
Will accept input timing anywhere in the frame, however near the middle of the video frame
the timing may be interpreted as related to the previous or next video frame. A status screen
indicates the detected timing in ms
LTC input – signal voltage range 0.5 to 10 V
p-p
differential, 1 V to 5 V
p-p
single ended
LTC input – 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
LTC input – hum tolerance 0 dB hum to signal ratio
LTC input – error immunity 100 consecutive frames with consistent time code must be detected for time to be considered
valid
LTC input impedance, typical Nominal 600 Ω differential, 300 Ω single-ended
VITC – video formats supported +VITS can be decoded from NTSC and PAL as per SMPTE 12M-1 2008
VITC – lines on which VITC is
detected +VITC is detected on lines 6 to 22 for all formats (ERI) 12M speci fi ed range for NTSC is
lines 10 to 20
VITC – timing in line VITC conforming to the standard timing will be detected. VITC slightly outside the normal
timing range may also be detected, but it must not run into burst or sync
VITC – allowed video SNR VITC will be correctly decoded for signals with more than 30 dB SNR
SPG8000 Speci fi cations and Performance Veri fi cation 5