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The PTS is a state of the art frequency instrument using a disciplined atomic clock to offer a wide range of features and time and frequency outputs accurate to <20ns rms to UTC (USNO) and 1x10-12 respectively. This product is both economic and very reliable, offering complete remote control and monitoring via a web-browser based interface. Applications include central time and frequency systems, satellite earth stations, and military communications systems network time servers. This product is one of Brandywine's staples and can be ordered in high quantity and has quick turn-around delivery.
A list of standard features of this GPS time and frequency standard include:
- GPS Disciplined Atomic Clock
- Remote Control over ethernet with included browser
- SA-ASM GPS Receiver option
- Network Time Server
- Serial COM port for setup
- 10MHz, 1PPS, IRIG B, ICD-060 serial time code
The PTS can be used in either a single or dual redundant configuration and in conjunction with one of Brandywine Communications range of Distribution Amplifiers, such as the FTSU-100.
Applications for the popular PTS include central time and frequency systems, satellite earth stations, military communication systems, and high availability network time servers.
An extremely accurate internal Rubidium oscillator is used as the internal time base that drives all the time and frequency outputs. This Rubidium oscillator is disciplined using an advanced control algorithm, ensuring superior holdover performance. The time constants of this algorithm are user-adjustable to suit specific applications.
The PTS is available both with standard C/A code and optional P(Y) code SA-ASM GPS receiver. It may also be disciplined to an external 1PPS/HaveQuick time code source.
A 10baseT Ethernet port is provided which is used both for monitoring and control of the instrument and for Network Time Protocol. This interface supports both fixed and dynamic IP address assignment via DHCP.
In addition to configuring the PTS, the built-in web browser provides information on GPS, internal monitoring of time errors, and internal parameters of the atomic oscillator. The user may set thresholds of any monitored parameter to trigger an alarm.
A precision 1PPS time mark is available for synchronizing or calibrating other equipment and the IRIG B serial time code allows synchronization to be distributed to other computers, displays and related equipment requiring precise time.
An ASCII serial port outputs any user-selected time of day message at a 1/sec rate for synchronizing other equipment. The same output port may also be configured to output 50 bit/sec BCD time code in accordance with ICD-GPS-060.
A high stability 10MHz sine wave output provides an ultra-stable, low phase noise frequency reference derived from an SC cut crystal that is locked to the rubidium reference.
| 1 PPS Output |
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| Connector |
SMA |
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| Type |
5V 0-pk, 10 microseconds wide |
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| On Time |
Rising edge |
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| Serial Interface |
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| Port Function |
Setup and Control |
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| Connector |
DB9 |
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| Type |
RS232 |
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| Baud Rate |
300-115,200 (Default 115k N, 8, 1) |
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| Sine Wave Output |
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| Number of outputs |
1 |
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| Connector |
SMA |
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| Frequency |
10 MHz |
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| Level |
2.5 Vpp into 50 Ohms |
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| Harmonic Distortion |
<25dBc |
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| Phase Noise (SSB) |
<-130 dBc/Hz (10Hz) typical |
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| <-140 dBc/Hz (100Hz) typical |
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| <-150 dBc/Hz (1000 Hz) typical |
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| Time Code Output 1 |
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| Number of Outputs |
1 |
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| Code Format (link sel) |
IRIG B 1kHz or |
DC level |
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| Level |
2.2 Vpp 600 Ohms |
HCMOS |
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| Connector |
SMA |
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| Time Code Output 2 |
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| Number of outputs |
1 |
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| Code format |
50 bit BCD ICD-GPS-060 or ASCII |
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| Level (link selectable) |
RS-232 (4,800, N, 8, 1) or BCD |
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| Connector |
DB-9 |
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| ASCII format |
1/sec user-programmable string |
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| Fault Alarm Status |
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| Output Type |
HCMOS level |
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| Output polarity |
User programmable |
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| Connector |
DB-9 |
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| Environmental |
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| Temperature |
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| Instrument |
0 to + 50°C |
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| Antenna |
-40 to +85°C |
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| Humidity |
To 95% non-condensing |
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| Power |
110/230 Vac |
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| Optional Power |
24 Vdc, -48 Vdc, 125 Vdc |
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| Dimensions |
3.25” x 7.25”x 15.8” |
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| With rack mount adapter |
19 inch Rack Mount, 3.48” (2U) height, 15.80” depth in rack |
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| Weight |
5.5 pounds, typical |
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| GPS C/A Code Receiver Specification |
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| Receiver type |
Motorola Oncore UT+ |
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| 8 channel C/A code timing receiver |
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| L1 only |
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| P(Y) Code GPS Receiver Specification Option) |
| Receiver Type |
GRAM SA-ASM receiver |
| Satellite Signal |
GPS L1, L2 Dual Frequency |
| Satellite Code |
C/A, P(Y) |
| Receiver Type |
Parallel 12 Channel 12 all-in-view receiver |
| Position Accuracy |
16m SEP in SA/AS environment with |
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respect to WGS-84 with CV loaded |
| Warm start |
<120 seconds with Almanac, CV loaded |
| Anti-spoofing |
Accuracy maintained in spoofing environment up to 10db> satellite signals |
| Jamming |
Operates with 34dB J/S at both L1 and L2 |
| Cold Start Requirement |
Automatic. No input of time or position |
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required. |
| CV Fill compatibility |
Via KYK-13 |
| Timing Accuracy |
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| Tracking satellites |
±100 ns. Absolute UTC |
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Std Deviation 20 ns |
| Holdover Mode |
One microsecond/day |
| Frequency Stability |
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| Tracking satellites |
See table below |
| Holdover Mode |
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| Aging |
<5x10-11/month after 30 days aging |
| Temperature |
± 1x10-10 0 to 50°C |
| Ethernet Interface |
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| Type |
10BaseT (100 base T optional) |
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| Connector |
RJ45 |
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| Protocols Supported |
NTP (RFC1305), SNTP, Daytime |
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| Web Browser |
5 pages |
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Status, GPS, Configuration, Alarms, Charts |
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| IP selection |
Static or Dynamic via DHCP |
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| Protocols |
Daytime, Telnet, FTP, DHCP, Time |
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| Other products |
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| FTSU-100 Frequency Synthesizer Distribution Amplifier |
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| Time/message display |
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| Video Time/message inserters |
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| Timing plug ins for CPCI, PCI, PC104, VME, PMC and ISA platforms |
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| Time and Frequency distribution |
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PTS - Precision Time System