1-4 800TCU User’s Guide 800gench1.fm Rev. A
General Information Signal Specifications
Internal Oscillator (TCXO)
Frequency: 10 MHz
Stability: < 0.5x10E
-6
, 0 to +50°C
Aging: < 1 PPM/year
Internal Oscillator (OCXO)
Frequency: 10 MHz
Stability: < 1x10E
-8
, 0 to +50°C
Aging: < 2x10E
-9
/day
External Time Base Input
Frequency: 1 MHz
Amplitude: 0.5 to 10 Vpp
Impedance: 10 kΩ to ground
External Start Input
Active Edge: Selectable, rising or falling. Starts on the next edge after
being Armed.
Levels: Logic Zero: 0 ±0.5 VDC
Logic One: >+2.5 VDC, <+5 VDC
Impedance: 4.7 kΩ to +5 V
IRIG-B Time Code Output
Amplitude: Adjustable, 0 to 10 Vpp into 600 Ω to ground
Ratio: Adjustable, 2:1 to 5:
NOTE: Rear Panel BNC is typically labeled "GEN
CODE"
Timing Signals
Rates: 1 kPPS, 100 PPS, 10 PPS, 1 PPS
Duty Cycle: 50%
Amplitude: 0 to +5 VDC at ±6 mA
Timing: Rising edge on time
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