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ClockWatch Radio Sync
with
TrueTime TL-3 WWV Receiver
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TrueTime TL-3 Receiver |
TrueTime TL-3 is an full
featured WWV receiver widely used for time synchronization. The TrueTime
receives time signals from shortwave (5-15 MHz) broadcast. The TL-3 is fully
supported in Radio Sync. The computer running
Radio Sync connects to the TL-3 receiver through the serial port and and
communicates using the receiver's native Mode-C protocol. The Radio
Sync software can then get the time from the NIST with millisecond
resolution. |
| Think of this as a uber version of the old GC-1000 WWV clock, updated by
30 years from an electronics perspective -- with three receivers instead of
one, runs cool with an external power supply (no cooking the components),
provides comprehensive time data (instead of just time of day display),
doesn't lose time during a power failure... and can be accessed by a PC. It
makes an inexpensive Stratum 1 time server. - CM, Rochester NY |
Major Features of the TL-3
- Time information includes Year, Month, Day, Hour,
Minute, Second. Automatic Daylight Saving and Leap Second Mode
- Three Separate Receivers Receiving Simultaneously.
Receivers have an audio monitor
- Battery Backup and 24 Hour "Supercap" Capacitor Backup
- RS-232 Serial Interface
- Includes Standard
IRIG-B AM Output
- Custom LCD Display
- External indoor ferrite or outdoor
dipole antenna.
- Direct support for receiver in many time
sync programs including Radio Sync,
NTP,
TimeServ, Cadence and others.
- Support for
Windows, Linux,
Unix,
MS-DOS,
Mac,
DEC, Sun O/S,
IBM resident timeservers using NTP.
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TrueTime TL-3 Specifications
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On-board Receivers
- Three separate WWV receivers: 5, 10 and 15 MHz Simultaneous data processing
- Type: AM, Single Conversion Synchronous Detector
- Antenna Input: 50 ohm, BNC female, 11 VDC on Coax Center to Power an Active
Antenna.
- Digital Signal Processing
- Internal Frequency (IF): 455 KHz
- Sensitivity: Audible at less than 0.5 uV input.
- Power: 12 VDC @400 ma via AC adapter
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Performance
- Time Accuracy; within +/- 5 msec of Coordinated
Universal Time (UTC) when receiving the National Institute of Standards and
Technology (NIST) WWV/WWVH radio signals.
- Lock On Time:5 minutes typical, under normal signal conditions. 2 minutes
maximum with strong signals present.
- Free-Running Stability: 20 ppm typical, 30 ppm worse case.
- Power Loss Backup: 24 hours CMOS clock backup with an 0.1 farad "supercap". Up
to 10 years CMOS clock backup with a 3 V lithium button cell battery.
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| Antenna
Either-
- AD-3 Dipole Antenna with 50 ft. RG-58 Coax and mounting bracket
(shown)
- Includes separate pole mounting bracket
or-
- AF-3 Active Ferrite Antenna with 6' RG-58 Coax
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Display Indicators
- Time: HH:MM:SS AM, PM
- Month, Day, Year; MM DD YY
- Day of Week: SUN, MON, TUE, WED, THU, FRI, SAT
- Julian Date: DDD
- Receiver frequency: 5 MHz, 10 MHz, 15MHz
- UTC
- Daylight Saving Time indicator
- Signal Strength
- Time Zone
- Propagation Delay
- Time Format
- Last Update
- Pulse Output
- Mode C
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Interface
- Liquid Crystal Display (LCD)
- RS-232 Communication Parameters: 300,600,1200, 2400,9600 Baud, selectable
parity, word length and stop bits. Connects to a PC running software at 9600
baud through the computer's native serial port (COM1-7)
- IRIG B (Amplitude Modulated) More...
- 1 PPS (One Pulse Per Second)
- 1 PPD (One Plulse Per Day)
- Audio Monitoring
- Includes power supply and RS-232 cable
(DIN to DB9)
- Includes 4 blank plug set for power,
RS-232, pulse and IRIG jacks.
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Mechanical
- Receiver Dimensions: 8.5W x 4.4"D x 2"H
- Desk or Wall Mount (bracket included)
- Dipole antenna - 6' tip to tip
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