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The AR77A incorporates numerous features into a single box, including a Rubidium Frequency Standard, an internal C/A code 12 channels GPS receiver (or P(Y) code GPS receiver. The GPS receiver must be supplied by user) and an input from external 1PPS / frequency.

The various options of the unit include a variety of different frequencies and several Time Codes outputs. The Rubidium Standard functions as a local oscillator and is phase-locked to the GPS or to external inputs. All outputs are derived from the Rubidium Clock, which maintains accurate time and frequency when GPS or other inputs are interrupted. For low cost applications an Oven Control Crystal Oscillator (OCXO) is offered instead of Rubidium Frequency Standard.

The unit includes up to three physical LAN interfaces boards, which support UDP / SNMP for management and for NTP (Network Time Protocol). The three LAN boards can be used for three different networks (with three different IP network addresses), or for two networks where the 3rd LAN board is reserved as a redundant back-up. A Precision-Time Protocol (PTP) is available with one of the LAN board. The AR77A provides multiple outputs: 10 coax outputs, two fixed (10MHz and 1PPS) and 8 configurable outputs which can be selected from 1PPS, 10MHz, and more.

Applications

• Test Equipment
• Telecommunication
• Cellular Base Stations
• Scientific Equipment
• Secure Communication
• Mobile Radio Base Stations

AR77A Specifications

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When you need a high frequency Hi-Rel reference clock, this industry standard DOC203810, Rev D standard specification is the answer. Revision D boasts an expanded upper frequency limit from 500MHz to 700MHz including a maximum bandwidth jitter performance of 0.3ps rms over 12kHz to 20MHz. Additional features include a dual complementary output pairs option (1308/1340) and leadforming option for all platforms. Using DOC203810 will significantly reduce design time and overall project costs.

Features include:

• Dual complementary output pairs option
• Expanded upper frequency limit from 500MHz to 700MHz
• Includes maximum jitter performance
• Addition of leadforming options with recommended pad layouts
• Enhanced electrical performance table
• Addition of NASA INST-EEE-002 compliance comparisons
• Shorter leadtimes for TOR-level (Enhanced Element Evaluation) requirements
• Improved comprehensive outline drawings

Click here for datasheet

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