Pendulum CNT-91R - Input C; Rear Panel Inputs & Outputs; Input C (Option 13); Input C (Options 14 & 14 B)

Timebase Options
Product Family
Option
Timebase Type
1)
Option 19/90
OCXO
Option 30/90
OCXO
Option 40/90
OCXO
Uncertainty due to:
-Calibration adjustment tolerance
@ +23 °C ± 3 ° C <5x10
-8
<1x10
-8
<3x10
-9
-Aging per 24 h
per month
per year
2)
<5x10
-9
<6x10
-8
<2x10
-7
2)
<5x10
-10
<1x10
-8
<5x10
-8
2)
<3x10
-10
<3x10
-9
<1.5x10
-8
-Temperature variation:
0 °C - 50 °C
20 °C - 26 °C (typ. values)
<5x10
-8
<2x10
-8
<5x10
-9
<1x10
-9
<2.5x10
-9
<4x10
-10
-Power voltage variation: ±10% <5x10
-9
<5x10
-10
<5x10
-10
Short term stability:
(Root Allan Variance)
 = 1 s
Typical values  =1 0 s
<1x10
-10
<1x10
-10
1x10
-11
1x10
-11
5x10
-12
5x10
-12
Power-on stability:
-Deviatio
n versus final value after 24 h
on time, after a warm-up time of:
<1x10
-7
30 min
<1x10
-8
10 min
<5x10
-9
10 min
Total uncertainty
Operating temperature 0°C to 50 °C,
@2 (95 %)
confidence interval:
-1 year after calibration
-2 years after calibration
2.4x10
-7
4.6x10
-7
<6x10
-8
<1.2x10
-7
<1.8x10
-8
<3.6x10
-8
Typical total uncertainty
Operating temperature 20°C to 26 °C,
@2 (95 %)
confidence interval:
-1 year after calibration
-2 years after calibration
<2.4x10
-7
<4.6x10
-7
<6x10
-8
<1.2x10
-7
<1.7x10
-8
<3.5x10
-8
Explanations
1)
Standard timebase oscillator in the CNT-90XL.
2)
After 1 month of continuous operation.
NOTE: Electrical adjustment by means of tuning voltage from DAC; no potentiometer trimming.
Serial interface to all optional oscillators for closed-case calibration and status reporting.
OCXO: Oven Controlled Crystal Oscillator
Specifications
USER MANUAL ● CNT 9x Series ● Rev.22 February 2020
8-25