Specifications
vii
CG635 Synthesized Clock Generator
Specifications
Frequency
Range
1 µHz to 2.05 GHz
Resolution
f < 10 kHz
1 pHz
f
10 kHz
16 digits
Accuracy
¨
f < ± (2×10
-19
+ timebase error) × f
Settling time
<30 ms
Timebase
(+20 °C to +30 °C ambient)
Stability
Std. timebase
<5 ppm
Opt. 02 (OCXO)
<0.01 ppm
Opt. 03 (Rb)
<0.0001 ppm
Aging
Std. timebase
<5 ppm/year
Opt. 02 (OCXO)
<0.2 ppm/year
Opt. 03 (Rb)
<0.0005 ppm/year
External Input
10 MHz ± 10 ppm, sine >0.5 V
pp
, 1 k
ȍ
impedance
Output
10 MHz, 1.41 V
pp
sine (+7 dBm) into 50
ȍ
Noise & Spurs
Phase noise (at 622.08 MHz)
100 Hz offset
<–90 dBc/Hz
1 kHz offset
<–100 dBc/Hz
10 kHz offset
<–100 dBc/Hz
100 kHz offset
<–110 dBc/Hz
Phase noise vs. freq.
6 dB/oct. relative to 622.08 MHz
Spurious
<–70 dBc (within 50 kHz of carrier)
Jitter and Wander
Jitter (rms)
<1 ps (1 kHz to 5 MHz bandwidth)
Wander (p-p)
<20 ps (10 s persistence)
Time Modulation
Rear-panel input
BNC, DC coupled, 1 k
ȍ
Sensitivity
1 ns/V, ±5 %
Range ±5
ns
Bandwidth
DC to greater than 10 kHz
