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CO-714 / 717 / 718S Oven Controlled Crystal Oscillators (OCXO)


CO-718

Features:
  • Frequencies from 1 to 25 MHz
  • Superior Aging Characteristics
  • Excellent Temperature Stabilities
  • AT and SC/IT Cut Crystal
  • Low Phase Noise option
  • SMA connector available
  • Low G-Sensitivity option



HF OCXO CO-714/717 Series
 CO-718S Series
Frequency 1-25 MHz with 5 MHz and 10 MHz standard
(available 32 kHz - 25 MHz with logic output)
Temperature Stability
(Temp. Range A)
+15°C to +35°C 		CO-71[  ] A38: ±3x10-8
CO-71[  ]A29: ±2x10-9 		CO-718SA28: ±2x10-8
CO-718SA19: ±1x10-9
(Temp. Range B)
0°C to +50°C 		CO-71[  ]B58: ±5x10-8
CO-71[  ]B59: ±5x10-9 		CO-718SB38: ±3x10-8
CO-718SB29: ±2x10-9
(Temp. Range D)
-20°C to +70°C 		CO-71[  ]D17: ±1x10-7
CO-71[  ]D28: ±2x10-8 		CO-718SD58: ±5x10-8
CO-718SD59: ±5x10-9
(Temp. Range G)
-55°C to +75°C 		CO-71[  ]G27: ±2x10-7
CO-71[  ]G38: ±3x10-8 		CO-718SG17: ±1x10-7
CO-718SG28: ±2x10-8
(Temp. Range F)
-55°C to +85°C 		  *CO-718SF27: ±2x10-7
*CO-718SF38: ±3x10-8
*N/A with L2 option
Aging [4] 1x10-8/day (2X10-6/year)
[7] 1x10-9/day (3x10-7/year)		 5X10-10/day (1x10-7/year).
5X10-8/year optional
at some frequencies.
2X10-8/year optional at 5 MHz
Restabilization at 25°
(freq. relative to that 2 hrs. after turn-on, following 24 hrs. off)
  Standard
1x10-7 9 minutes
3x10-8 12 minutes
1x10-8 30 minutes
  Standard 6W Turn-on
1x10-7 7 min. 4 min.
3X10-8 10 min. 7 min.
1x10-8 15 min. 10 min.
G-Sensitivity Low G-Sensitivity option available - Contact factory
Output Level Standard: >0.5 Vrms/50 ( + 7 dBm): >1 Vrms/50 (+ 13 dBm) with L2 option. HCMOS/TTL is optional.
Supply Voltage (±5%) + 15 Vdc standard (12-24 Vdc optional);
Option "J":+ 15 Vdc and + 5 Vdc for HCMOS/TTL:
Option "N": +5 Vdc supply with HCMOS/TTL output available
(results in some degradation in stability)
Input Power <4 Watts at turn-on -20/+70°C (lower power available);
2 Watts stabilized at 25°C
Frequency Adjustment Mechanical adjustment settable to 1x10-8.
Option "V"- electronic tuning: 0.3ppm over 0/6V in CO-714/717 Series. 0.1ppm over 0/6V in CO-718S Series.
Size 2" x 2" x 1" (0.75" also available)
Phase noise (typical static conditions with sinwave output 4-12 MHz)
Offset Standard Option L2*
10 Hz -105 dBc/Hz -120 dBc/Hz
100 Hz -135 dBc/Hz -145 dBc/Hz
1 kHz -145 dBc/Hz -160 dBc/Hz
10 kHz -148 dBc/Hz -165 dBc/Hz
50 kHz -150 dBc/Hz -165 dBc/Hz
* 10 MHz lower frequency limit
Contact Factory for lower frequencies.
Offset Standard Option L2*
10 Hz -115 dBc/Hz -130 dBc/Hz
100 Hz -140 dBc/Hz -155 dBc/Hz
1 kHz -145 dBc/Hz -163 dBc/Hz
10 kHz -148 dBc/Hz -166 dBc/Hz
50 kHz -150 dBc/Hz -168 dBc/Hz
* 4 MHz lower limit
Configuration Pins for pcb mounting
Option "W": SMA output connector and terminals on side, studs on base.
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CO-714/717/718S
Dimension in inches
 
Pinouts
Pin
*1
**2
3
4
5
 Function
VCXO Input
N/C
RF Output
0 Volts, Case
Supply (+)

*Only with electronic tuning option; otherwise, pin is No Connection. For fine tuning adjustment with the "V" option, connect one end of a 20k wirewound potentiometer to a stable reference voltage, the other end to 0V, Case and wiper arm to VCXO input.

**+5Vdc input logic output option.
Option "W"
Dimension in inches
 
Pinouts
Pin
1
2
*3
 Function
Supply (+)
0 Volts, Case
VCXO input

*Only with electronic tuning option; otherwise, pin is No Connection. For fine tuning adjustment with the "V" option, connect one end of a 20k wirewound potentiometer to a stable reference voltage, the other end to 0V, Case and wiper arm to VCXO input.
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