Features
- Ruggedized
- Flight Qualified
- Available with vibration-isolated OCXO or CSAC Oscillator options
- Gigabit Ethernet
- GNSS, SAASM, or M-Code supported
- Designed for GPS denied environments
This versatile timing unit employs its GPS for basic disciplining of its internal Oven Controlled Crystal Oscillator (OCXO), and an – optional – Chip Scale Atomic Clock (CSAC), providing holdover capabilities in a GPS denied environment in excess of 20 hours. Complimented by a low phase noise, vibration compensated 10MHz reference output locked to the 1PPS ICD-GPS-060B compliant output, the Brandywine Communications Compact Airborne Timing Unit provides unparalleled availability of reliable TOD in highly demanding fixed, and rotary-wing applications.
A commercial version with GNSS Receiver is also available.
GPS Antenna Input
| Signal Type | GPS CA GPS P(Y) (optional) GPS M-Code |
| Input Signal Level (at receiver RF connector) | P(Y) on L1: -153 dBW to -121 dBW P(Y) on L2: -153 dBW to -124 dBW C/A on L1: -150 dBW to -119 dBW |
| Minimum Operating Bandwidth | L1 1575.42 MHz ± 10.23 MHz L2 1227.60 MHz ± 10.23 MHz |
| Input Impedance | 50 Ω (nominal) |
| Input VSWR | 2.5:1 maximum at center frequency of L1 and L2. |
Power
| Number of Inputs | 1 |
| Voltage | 28VDC per MIL-STD-704F |
| Rated Current Draw | 1A |
| Interface Type | IS-GPS-154 |
Phase Noise
| G-sensitivity | 5x10-11/G |
| Vibration Frequency Range | 10Hz-2000Hz |
| Allan Deviation | 1 second 1x10-11 10 seconds 1x10-11 100 seconds 5x1011 |
1PPS Output
| No. of Outputs | 2 |
| Signal Type | Per ICD-GPS-060B |
| Signal Rate | 1 pulse per second |
| Rising Edge | On Time |
| Rise Time | <50ns |
| Signal Type | Sinusoid |
| Fall Time | <100ns |
| Pulse Width | 20 µs ±5% default |
| Output Amplitude | 10V ±10% |
| Coherency | 1PPS = 10MHz/106 |
10 MHz Output
| Signal Type | Sinusoid |
| Output Frequency | 10 MHz |
| Output Amplitude | 13dBm/1Vrms |
| Harmonic Distortion | -30dBc |
| Frequency Accuracy (Locked) | 1x10-12 avg. over 24 hours |
| Holdover | 1µSecond 24 hours |
Ethernet Interface
| Signal Type | Gigabit Ethernet (IEEE 802.3ab) |
| Protocols Supported | NTPv4, SNMPv3, SSH |
Physical
| Dimensions | 7.29” x 4.52” x 2.36” |
| (185.166mm x 114.808mm x 59.944mm) | NTPv4, SNMPv3, SSH |
| Weight | 3 lbs. (1.36 kg) nominal |
| Connectors | J1 Antenna, SMA J2, J3 1PPS SMA J4, J5 10 MHz SMA J6 D-Sub17 for KLIF, DS/101-232 J7 1Gb Ethernet |
| Battery | MMCx |
| Antenna Supply | 5V @ 35mA |
Environmental
| Operating Temperature | -40°C to +55°C |
| Altitude | 41000 ft. |
| Humidity | 95% non-condensing |
| Environmental Certifications | Tested to the following specifications: MIL-STD-810F, MIL-STD-461: CS101, CS114, CS115, CS116 |
