# MD-996 Disciplined Oscillator Module

## Features
· 1PPS and 10 MHz output signals
· 15nSec accuracy (one sigma)
· Automatic self-survey for improved timing accuracy
· TRAIM (Timing Receiver Autonomous Integrity Monitoring) for high PPS integrity

## Description
· Uses Vectron’s Ovenized Quartz Crystal Oscillators (OCXO) with Trimble’s Mini-Thunderbolt™ platform.
· Embedded 12-channel GPS receiver for synchronization to GPS or UTC time.
· Tight holdover performance.
· Customizable solutions available.

## Applications
· Digital Video Broadcast
· Telecommunications time synchronization
· Satellite communication frequency references

## Performance Specifications
· GPS: L1 frequency, C/A code (SPS), 12-channel, continuous tracking, 1Hz update rate.
· 1 PPS Accuracy: 15 nanoseconds (one sigma)
· Output Frequency: 10 MHz
· Phase Noise:
- 10 Hz: -120 dBc
- 100 Hz: -135 dBc
- 1 KHz: -145 dBc
- 10KHz: -145 dBc
- 100KHz: -145 dBc
· Holdover: 27 us for 24 hours with 5°C temperature delta
· Stability: +/- 50ppb from 0 to 60°C (when not tracking)

## Interface Specifications
· 1 PPS Connector: SMA-f (J3), TTL levels into 50 ohms, 10 microsecond-wide pulse with 20ns leading edge synchronization.
· 10 MHz Connector: SMA-f (J2)
· Antenna Interface: SMA-f (J4)
· Power/I/O Connector: Molex 70543-0005 (6-pin) (J1)
- Pin 1: NC
- Pin 2: GPS TXD 3.3V CMOS
- Pin 3: GPS RXD 3.3V CMOS (5V tolerant)
- Pin 4: Ground
- Pin 5: +V Antenna (2.7VDC - 5.5VDC @ up to 100ma)
- Pin 6: +5V± 0.25V (@ <750ma cold, <350ma warm)
· Serial Protocol: Trimble Standard Interface Protocol (TSIP), binary protocol @ 9600, 8-None-1

## Environmental Specifications
· Operating Temperature: 0 °C to +60 °C
· Storage Temperature: -40 °C to +85 °C
· Operating Humidity: 5% to 95%, non-condensing
· Operating Altitude: 18,000 m

## Physical Characteristics
· Mounting: Four .130” diameter mounting holes