Anritsu MP8931A - Page 144

Appendix A Specifications
A-2
(2) NRZ interface
Item Specifications
Common
(I/O)
Connector
BNC (75
Ω
)
Output sig-
nal
Signal type
Data/Clock
Common to
data/clock
Level
<ECL> High: –0.9
±
0.2 V, Low: –1.7
±
0.2 V
<TTL> High: +2.5
±
0.3 V, Low: 0
±
0.3 V
Termination
voltage condi-
tions
ECL: –2 V, TTL: GND
Termination
Fixed to 75
Ω
Polarity
switching
Data: Positive, Negative
Clock: Rise, Fall
CLK (Rise)
Data
Enable/Disable
Enable/disable (fixed to Low) setting
Data
Bit Rate
1 kHz to 155 MHz, Resolution: 1 Hz
Waveform
NRZ
Tr/Tf (20 to 80%)
1 ns or less (ECL), 1.5 ns or less (TTL)
Clock
Frequency
1 kHz to 155 MHz, Resolution: 1 Hz
Accuracy:
±
10 ppm
Duty
50%
±
10%
Tr/Tf (20 to 80%)
1 ns or less (ECL), 1.5 ns or less (TTL)
Output phase
Data
Clock (Rise)
t
| t | ≤ 1 ns (at ECL level)
| t | ≤ 2 ns (at TTL level)
Data
Clock (Fall)
t
| t | ≤ 1 ns (at ECL level)
| t | ≤ 2 ns (at TTL level)