GPStarplus® Model 565

GPStarplus® Model 565

GPStarplus® offers a new level of price-performance in off-the-shelf Time/Frequency Systems. Full-featured, but compact (1.75″ high mountable in a standard 19″ rack), the GPStarplus provides accurate synchronization to UTC, including IRIG-formatted outputs. Operation interface and control are provided by RS-232 or front-panel keypad.



GPStarplus® is a fully featured, off-the-shelf, compact time and frequency system providing a new level of price/performance. It provides accuracy within 100 nanoseconds of UTC (Coordinated Universal Time). GPStarplus tracks up to eight satellites at a time. When used as a frequency standard, GPStarplus can provide 5 E-12 frequency accuracy.

GPStarplus® is packaged in a 19″ rack mount chassis that is only 1.75″ high. The control and operation interface is provided via RS-232 or a front panel key pad. A 2-line by 40-character backlit LCD display reports Julian time and date, as well as informing the user if time is locked, how many satellites are being received, and other status information.
The standard power supply operates from 95 – 264 VAC at 50 – 60 Hz.


  • High Performance:  
    Compact, Flexible
    Fully Featured
  • Oscillator Options
    Ovenized Quartz
    Rubidium Atomic
  • Simultaneous Sinusoidal

    1, 5, 10 MHz
  • Time Code Output
    IRIG A, B or G
    Simultaneous modulated
    and DC Shift
  • Time Related Functions:
    2 Pulse Rate Outputs
    Event Time Tag
    Event Time Trigger
1 PPS Output, Qty 1, BNC Connector:
Waveform: Pulse
Pulse Width: 2 ms
Level: TTL into 50 Ω
Synchronization:  Rising edge on-time (f).
 Accuracy, Time Locked:   100 ns referenced to UTC
 Coasting, Rubidium Osc.:   4.3 μs per day
 Coasting, Quartz Osc.:   10 μs per day
 Jitter:   1 ns
 Event Trigger Output, Qty 1, BNC Connector:
Wave Shape: Pulse
Level:   TTL into 50 Ω
Start Time:   To 1 year with 100 ns resolution, selectable
Repetition Rate:  Single-shot, or to 99 hrs, 59 min, 59.99 sec, selectable
 Pulse Width:   1 μs to 8.999999 sec., selectable
 On Time Edge:   Rising or falling, selectable
 Time Tag Input, Qty 1, BNC Connector:
Input Signal: 0 to +5 V into 10 kΩ
Input Pulse Width: 100 ns minimum rising to falling edge
Dwell Time: 2 ms between events
Buffer Size: 500
 Tag Rate:  500/sec maximum
 Rate Output, Qty 2, BNC Connectors:
Rates, Selectable: 1, 10, 100 PPS; 1, 10, 100 kPPS; 1, 5, 10 MPPS and others
Wave Shape: Pulse
Level: TTL into 50 Ω
On Time Edge: Rising or falling, selectable
 AC Time Code, Qty 1, BNC Connector:
Signal Type: Modulated sine wave
Code Format: IRIG A, B or G user selectable
Level: 3 V p-p into 50 Ω
 DC Time Code, Qty 1, BNC Connector:
Signal Type: DC Shift
Code Format: Same as selected AC time code
Output Level: TTL into 50 Ω
 Frequency Outputs, Qty 3, BNC Connectors:
Wave Shape: Sinusoid
Amplitude: 12 dBm +/- 0.5 dBm into 50 Ω
Frequency: 1, 5 or 10 MHz user selectable
 Harmonics:  -40 dBc
 Spurious Level:  -70 dBc
 Phase Noise (dBc/Hz, typical):
1 Hz: -80 < dBc/Hz
10 Hz: -100 < dBc/Hz
100 Hz:   -105 < dBc/Hz
 1 kHz to 100 kHz:  -115 < dBc/Hz
 I/O Control Port/TOD Output:
Connector: DA-15
Signal Levels: RS-232C
I/O Control: 9600, 19200, 38400 Baud
 TOD:  9600 Baud
 Protocol:  1 Start Bit, 8 Data Bits, 1 Stop Bit, No Parity
 Discrete Outputs:
Connector: DA-15 (same as Control/TOD)
Alarm/BITE: Open drain FET
Time Locked: Open drain FET
  Standard GPS Receiver – Civil C/A-Code:
 Type:  12 channel L1
Connector: TNC female
 Connector: DA-15
 Signal Levels: RS-232C
 I/O Control: 9600, 19200, 38400 Baud
TOD: 9600 Baud
Protocol: 1 Start Bit, 8 Data Bits, 1 Stop Bit, No Parity
 Available with AC or DC power:
AC Power: 100 – 240 VAC, 50-60 Hz, 50W maximum
DC Power: Contact Factory
Height: 44 mm (1.75″) (1U)
Width: 4438 mm (17.25″) (19″ EIA Rack Mounts included with unit)
Depth: 310 mm (12.2″) including connectors
Weight: 3.3 kg (7.2 lbs.) maximum.
Altitude, Operating: -60 m to 4000 m
Altitude, Storage: -60 m to 9000 m
 Operating Temperature:   0° C to 50° C
 Rate of Change:  10° C/Hour
 Storage Temperature:  -40° C to +85° C
 Relative Humidity:  5 % to 95 %, non-condensing

(a) After 72 hours of GPS locked operation, fixed antenna location, antenna delays entered.
(b) At constant ambient temperature.
(c) (95 % probability).
(d) one day average

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