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Specification:
Item Type: Frequency Standard Reference Module
Current Consumption: Preheating stage Warm Up Time: About 5 minutes
Calibration Accuracy: ±0.01Hz
Frequency Stability: 5e-12
Output :
DBm: 10dBm±2dBm at 50Ω;
VRMS: 0.7071V at 50Ω;
VPeak: 1.0V at 50Ω;
VP P: 2.0V at 50Ω
Output Impedance: 50Ω
Interface Type: SMA Female
Product Use: Constant temperature 10MHz, ultra low phase noise, frequency reference module, frequency reference source, OCXO frequency reference source, used for instrument benchmarks such as audio systems, decoders, shortwave radios, frequency meters, sources, etc.
Packing List:
1 x Module
1 x Cable
Circuitech
2025-02-24 12:22:06
Bought this to replace the crystal oscillator in my Heathkit IM-2420 frequency counter. After 40 years of baking in the counters’ crystal oven at 75°C, the original oscillator components were all crispy critters.As another reviewer mentioned, I found the modules’ trim pot was 200 K, not 100 K as shown in the listing photo. Also, it could not be adjusted to satisfactory accuracy. I don’t have a certified, calibrated, traceable, etc frequency standard, just a vintage commercial video sync pulse generator with a 3579545 Hz chroma subcarrier output. that other reviewer also mentioned you could short R3, then crank the trim pot fully clockwise until it clicks, and get within one hertz. I was able to duplicate his results so I feel my frequency counter is now accurate enough. in my photo you can see the blue jumper wire across R3.
Owen C. Western
2025-01-18 20:18:25
I bought mine to calibrate a frequency counter. At this price I didn't put much credibility in the specification of .01HZ, which would be one cycle off from WWV in over 1 1/2 minutes. The first one I bought got down to within 1.5 HZ. The calibrate trimmer couldn't bring it into spec. The second one arrived with the power socket and a tiny surface mount resistor right behind the socket both broken loose and lying in the bottom of the mylar bag. I re-soldered both back into place. It works perfectly, once I repaired it. No ripple, no frequency change with changing load. Very stable and quiet.
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