Datasheet

Page 14
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Timebase and Trigger Specifications
Timebase U2042/44/49XA U2063 and L2061/62/63XA
Range 2 ns to 100 ms/div
Accuracy ± 25 ppm ± 2.0 ppm
1
Jitter ≤ 1 ns
Trigger
Internal trigger range U2042/44XA: –25 to +26 dBm –25 to +26 dBm
U2049XA: –25 to +20 dBm
Resolution 0.1 dB
Level accuracy ± 0.5 dB
Latency 1.5 µs ± 50 ns 1.95 µs ± 50 ns
Jitter ≤ 5 ns rms
External TTL trigger input
High > 2.4 V
Low < 0.7 V
Latency 500 ns ± 50 ns 950 ns +- 50ns
Minimum trigger pulse width 150 ns (average mode)
50 ns (normal mode)
Minimum trigger repetition period 300 ns (average mode)
100 ns (normal mode)
Maximum trigger voltage input 5 V EMF from 50 Ω DC (current < 100 mA) or
5 V EMF from 50 Ω pulse width < 1 s (current < 100 mA)
Impedance 100 kΩ (default), 50 Ω
Jitter ≤ 15 ns rms
External TTL trigger output
High > 2.4 V
Low < 0.7 V
Latency 500 ns ± 50 ns 950 ns +- 50ns
Impedance > 2.4 V
Jitter ≤ 15 ns rms
Trigger delay
Range Normal mode: ± 1.0 s
Average only mode: –1.6 ms to +1 s
Resolution 1% of delay setting, 50 ns minimum
Trigger hold off
Range 1 µs to 400 ms
Resolution 1% of selected value (to a minimum of 50 ns)
Trigger level threshold hysteresis
Range ± 3 dB
Resolution 0.05 dB
1. ± 2.0 ppm for first year. Typically ± 2.7 ppm after first year.