Timebase Accuracy
Setability: < 0.01 ppm
Stability: ±2 ppm 0°C - 50°C
Aging: < 1 ppm in first 30 days
(continuous operation)
10
-7
/ month
(after first 30 days operation)
Rear-Panel Input (
Ext Ref In
terminal)
Lock Range: 10 MHz ±50 Hz
Level: -10 dBm to +15 dBm, +25 dBm
or 10 Vpp absolute maximum input
Impedance: 50Ω ±2%, 42 Vpk isolation from earth
Locktime: < 2 seconds
Rear-Panel Output (
Ref Out
terminal)
Frequency: 10 MHz
Level: > 1 Vpp square wave into 50Ω
Phase Offset
Range: +360 to -360 degrees
Resolution: 0.001°
Accuracy: 25 ns
Trigger
Level: 5V zero-going pulse
Pulse Width: > 2 µs
Fanout: Four (4) HP 33120As
Chapter 3 Specifications
HP 33120A / Option 001 Phase-Lock Assembly
30
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