1) Features

- Size: 96mm×76mm×22mm (L* W* H), volume is 160ml;

- High reliability: Suitable for ground military vibrating environment;

- Wide temperature range: -45～+75℃;

- Timing holdover: After being disciplined, it can meet 5μs/3 days (typical value).

2) Application

Specially designed for ground telecommunication, vehicle, naval vessel etc. vibrating environment, it can be assembled in the board equipment, providing precise and stable timing frequency standard.

3) Specification

3.1 Ordering Model

In order to meet up different customer’s requirements, we use production number (PN) to verify different performance, the ordering model is made up by product model and its technical level. Customer is recommended to use the following method when placing and order:

For example, if customer orders XHTF1022C-S, it means frequency temperature performance is 8E-10, holdover is 5μs /3 days.

3.2 Output Standard Signal (50Ω loading)

- Frequency: 10MHz

- Channel: one way

- Wave form: sine

- Voltage: ＞5dBm

- Harmonic: ＜-40dB

3.3 Accuracy: ＜±5E-11 at 25℃

3.4 Lock time:

- ≤5min (@+25℃)

- ≤15min (@-45℃)

3.5 Frequency stability

- ＜3×10^-11/1s;

- ＜9×10^-12/10s;

- ＜3×10^-12/100s.

3.6 Drifting: Day aging ＜±5×10^-12

3.7 Temperature accuracy:

Within -45℃～+70℃, its accuracy meets up the following requirements, and it can be locked at +70～+75℃.

Level number P or blank C

Accuracy: ＜5×10^-10 ＜8×10^-10

3.8 Repeatability: ＜2×10^-11

3.9 Output pulse (the same source with 10MHz):

- Frequency:1pps

- Chanel: one

- Electric level(latitude): ＞3V

- Rise time: ＜15ns

- Width: ＞1μs

3.10 GPS External Second Disciplining and Holding

External second discipling function: XHTF1022C can be connected to GPS reference second, discipline frequency accuracy output from atomic clock.

Accuracy holding (environment temperature fluctuation ≤5℃, no obvious mechanical vibration): After discipling for one hour by GPS, average accuracy within 3 days (or holdover within 3 days) meets the following specification:

Note: GPS jitter shall be less than100ns.

3.11 Frequency Adjustment

Accuracy can be adjusted through serial port, resolution is ≤1E-12, range is ≥±2E-9.

3.12 Power and Voltage

Power supply : +12V±0.4V DC

Voltage: initial consumption＜32W, steady consumption ＜8W (at +25℃)

3.13 Operating temperature

-45℃～+75℃, ensure it can be locked within this range, and meet up with temperature accuracy requirement.

3.14 Storage temperature

-55℃～+85℃, moisture is less than 95% (30℃).

3.15 Function Vibration Test

Table - 2 Vibration Test Condition

3.17 External Appearance

XHTF1022C dimension is, its weight is ＜0.35kg.

Table -3 Interface Pins Definition