TTGM-101B GPS / Time Code Synchronized Generator

The Model TTGM-101 GPS/Time Code Synchronized Generator and PTP Grandmaster is a low cost high performance unit that provides many features typically found on higher cost units. When operated in the GPS mode, time and rates are precisely referenced to UTC.

TTGM-101 GPS-Time Code Synchronized Generator

Features:

  • Synchronizes to GPS
  • Synchronizes to IRIG Time Codes
  • Default Profile for PTPv2
  • SNTP Time Server
  • SNMP operation
  • AM and DCLS Time Code Outputs
  • Precise 1PPS Output
  • N1 Rate Synthesizer
  • 1PPS Time Interval Measurement
  • LED Status Indicator
  • OLED Time Display
  • RJ-45 100base-T port for PTPv2
  • Rugged / Portable Case
  • Windows GUI for Setup, Control and Time Interval Measurement Display

Product Description

The Model TTGM-101 GPS/Time Code Synchronized PTP Grandmaster, SNTP Server and Time Code Generator is ideal
for applications utilizing GPS or time code input to generate IEEE-1588 PTPv2, SNTP or various time codes. Time and rate outputs are precisely referenced to GPS or time code input. The TTGM will also synchronize to a 1PPS input. In addition to PTPv2 and SNTP operation, IRIG A, B, G and NASA36 time code outputs, time is available on the USB port. Limited SNMP trap operation is also standard on this versatile unit.

The TimeTap will synchronize to the selected reference to less than 1 microsecond and can provide local or daylight sav- ings time with settable timing offsets. The TimeTap can also provide the IRIG time codes to drive external time displays. This unit can be paired with the TT-101 for PTP synchronization over a network as well as time code synchronization. Computer synchronization can be accomplished with Domain Time II software available through ORCA Technologies.

This versatile product also has a 1PPS Time Interval Measurement feature that will graph the difference between the
TTGM ’ s 1PPS and an external 1PPS rising edge.

The TTGM-101 PTP implementation is compatible with and has partial compliance to the IEEE-1588 PTPv2 standard.

Product Specifications

General Specifications

  • Timing Accuracy:
    • < 100 nanoseconds to UTC (GPS)
    • < 1 microsecond to DCLS Time Code or 1PPS
    • < 5 microseconds to AM Time Code reference
  • Internal Oscillator: 50MHz Crystal Oscillator
    • 1PPM, DDS steering

Standard Inputs

  • GPS Input: 1.575 GHz L1 C/A Code GPS
    • Receiver: 12 parallel channels Internal
    • Oscillator disciplined to GPS Antenna: L1
    • GPS with 5-meter SMA cable Connector:
    • SMA labeled GPS ANT
  • AM Serial Time Code Input
    • Format: IRIG A, B, G; NASA36
    • Amplitude: 1-6 Vpp
    • Connector: SMA labeled CODE INPUT
  • DC Level Shift (DCLS) Serial Time Code Input
    • Specification: IRIG A, B, G; NASA36
    • Amplitude: TTL levels
    • Connector: DB-15 multi-pin, pin 9
  • 1PPS Reference Input
    • Amplitude: TTL levels
    • Connector: DB-15 multi-pin, pin 7

Standard Outputs

  • PTPv2 Default Profile
    • Ethernet II, IPv4, UDP Multicast,
    • Two-step PTPv2 packets
    • Connector: RJ-45
    • Limited PTPv2 compliance
  • AM SNTP
    • Unicast protocol only
    • Hardware Timestamps
    • With accurate, low latency responses
    • Connector: SMA labeled CODE OUT
  • AM Serial Time Code Output
    • Format: IRIG A, B, G; NASA36
    • Amplitude: 3 Vpp into 50 ohms
    • Ratio: factory set to 3:1
    • Connector: SMA labeled CODE OUTPUT
  • DC Level Shift (DCLS) Serial Time Code Output
    • Format: IRIG A, B, G; NASA36
    • Amplitude: 3.3V logic
    • Connector: DB-15 multi-pin, pin 10

 

  • 1PPS Output
    • Logic Level: 3.3V logic into 50 ohms
    • Timing: Positive edge on time
    • Timing: Locked to the internal clock
    • Duty Cycle: 50%
    • Connector: DB-15 multi-pin, pin 5
  • N1 Rate Synthesizer x2 Outputs
    • Logic Level: 3.3V logic
    • 0 to 16,777,215 PPS with 1PPS steps
    • Timing: Locked to the internal clock
    • Duty Cycle: 50%
    • Connector: DB-15 multi-pin, pins 3 and 6
  • Selectable Output
    • 3.3V Logic, 1 of these signals: Buffered DC Input,
    • 1PPS 50%, 1PPS 20us, N1(A), N1(B), DCLS Time Code,
    • Decade pulse rates to 10MPPS, 5MPPS
    • Connector: DB-15 multi-pin, pin 8
  • USB Port
    • Output Data: Time and Status
    • FTDI Virtual COM Port
    • Connector: Micro USB
    • Supplies 5V unit power, Command Line Interface I/O,
    • Time once per second
  • DC Power Level: 5 Vdc < 500 mA
    • Powered through the USB Bus or DB-15 multi-pin
  • AC Power via AC to DC converter module

Environmental/Mechanical

  • Physical Dimensions
    • Size: 4.72″ length X 4.07″ width X 1.20″ height
    • Weight: 1 pound
    • OLED Display: 2 lines, variable intensity
    • Operating Temperature: 0 to 50 degrees C
    • Storage Temperature: -40 to +80 degrees C
    • Humidity: To 95% non-condensing
  • Antenna
    • Size: 1.81” length X 1.81” width X .50” high
    • Weight: < 1 pound
    • Operating Temperature: -40 to +70 degrees C
    • Storage Temperature: -40 to +85 degrees C
    • Connector: SMA
    • Cable Length: 5 meters (Longer lengths available)

Options

  • Breakout cable for DB-15 multi-pin connector
  • Domain Time II software

Product Views

TTGM-101B GPS/Time Code Synchronized Generator ModelTTGM-101B GPS/Time Code Synchronized Generator Model Rear View

 

Downloads

 

TTGM-101B GPS / Time Code Synchronized Generator