AR- 51-07
GPS-Disciplined Rubidium Clock
Industrial/Military Compact Low Profile
AR-51-07
Features
• GPS disciplined Rubidium clock
• Outputs: 10MHz, 1PPS (TTL & RS-422), TOD (Have Quick),
2PPS (opt.)
• Input: GPS antenna, 1PPS, TOD (Have Quick)
• Frequency Accuracy : 2E-12
• 1PPS Accuracy: Typ. 20ns (RMS)
• NTP Server. Time Accuracy <300μs (opt)
• Holdover (no GPS): Typ. 1μs/24 hours, 5E-11/month
• Opera ng Temperature: -25°C to +65°C (71°C Emergency).
-40°C (opt.)
• Control and monitoring : RS-232 (input & output),
RS-422 (output), MIL-STD-1553 (opt.)
• Ephemeris, Almanac & Ionosphere Data
• Supply Voltage: 22-32 VDC per MIL-STD-704D
• External ba ery input for power back-up
• P(Y) code GPS (SAASM) receiver (Op on)
• Full MIL-STD qualifica on for military Airborne Applica ons
• Graphic User Interface (GUI) So ware for PC
Application
• Communica on
• Telemetry test
fi
elds
• Field calibra on
Description
The AR-51-07 unit is an industrial low profile GPS-Disciplined Rubidium Clock which offers an excellent stability and accuracy. The unit
includes a Rubidium-Atomic-Standard which is phase-locked to the GPS or other external inputs. All outputs are derived from the Rubidium-
Atomic-Standard and maintain highly accurate me and frequency even when GPS recep on is interrupted. When disciplined to GPS the unit
provides me accuracy of < 20ns RMS and frequency accuracy be er than 2E-12.
The AR-51-07 includes Have Quick (ICD-GPS-060) input and output which is essen al for secure radio communica on applica ons. The unit
can be remote controlled via MIL-STD-1553RT channel which is required in airborne applica ons.
The unit includes internal GPS receiver (C/A code) and have op on to install P(Y) code SAASM GPS receiver (For more informa on contact
factory).
The AR-51-07 is designed for demanding pla orms such as airborne, helicopters, UAV’s, shipboard and ground mobile.
Page 1 of 8
Vectron Interna onal • 267 Lowell Road, Suite 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • h p://www.vectron.com
Rev 1.0 Oct 2014
Performance Specifica ons
All specifica ons are at room temperature, quiescent condi ons, sea level ambient unless otherwise specified
Input & Outputs
1 x 10MHz, Sine wave (8±3) dBm SMA / 50Ω
2 X 1PPS TTL/50Ω
Outputs
5 x 1PPS ICD-GPS-060/ 50Ω (10V, 20μs)
4 x 1PPS RS-422
AUX: 1PPS TTL/50Ω or other signal (opt.)
5 X TOD ICD-GPS-060 / 100KΩ
TOD ICD-GPS-060 TTL/100K
Ω
Input
GPS Antenna
External 1 PPS ICD-GPS-060/ 50Ω or TTL/50Ω (see op on 4)
CLI RS232 (input/output) for control and monitoring: se ng me/date, delay
correc on for 1PPS 10ns steps, mode of opera on; disciplining to GPS/Ext
1PPS, holdover, UTC me, GPS Time, Local Time, Day Light Saving etc. (see CLI
document for more informa on).
Baud rate: 19,200, Control: 1, N, 8
CLI RS422 (the Input (RXD) can not be connected simultaneously with the RS232).
Op on: LAN – NTP / MIL- STD-1553RT (MUX-BUS)
GUI for PC is available :Time, Date, Posi on, Status, BIT (Built in test) etc.
1PPS PTTI
TOD H.Q.
CLI RS-232
GPS Crypto Keys
MUX-BUS Address (opt)
J5
J3
J6
22-32 VDC
J1
J7
AUX OUT: 1PPS RAW
10MHz/50Ω
1PPS TTL/50Ω
J2
J2
GPS Ant.
5x TOD H.Q.
J4
5x 1PPS PTTI
4x 1PPS RS-422
1x 1PPS TTL/50Ω
CLI RS-422
AR-51-07
Overall BIT
NTP/MUX-BUS (opt)
Communica on
Performance
Time (1PPS)
Long Term Accuracy
Long Term Stability
Short Term Stability
Temperature Stability
Frequency
1Hz
Phase Noise
Frequency
(10MHz)
Harmonics
Spurious
10Hz
100Hz
1KHz
10KHz
≤-100dBc/Hz
≤-134dBc/Hz
≤-143dBc/Hz
-101dBc/Hz
-137dBc/Hz
-144dBc/Hz
Disciplined to GPS or to an External synchroniza on source 50ns RMS (typ. 20ns RMS) @ 25°C, rela ve to an external ref.
Time Dri without GPS (Hold-Over)
Disciplined to GPS or to Ext. 1PPS
Free running Rubidium-Standard
≤
4E-11 @ 1s (≤3E-11 Typ.)
±3E-10 over -25°C to +65°C (-40°C opt.)
Standard (spec)
Standard (typical)
Improved (typical)
-96/Hz
-128/Hz
-148/Hz
-150/Hz
-153/Hz
< 1μs/24hr (Typ.)
< 2E-12 (24 hour average, const temp.)
5E-11 / month drift in holdover
Warm-up
Retrace
≤-145dBc/Hz
-149dBc/Hz
≤-45
dBc (-58 dBc typ.)
<-75 dBc @ ± 100KHz from carrier
Rb Lock < 4 min
5E-10 within < 7 min
5E-11 within < 60 min,
1E-11 within < 4hrs
2E-12 within < 24 hrs.
± 4E-11
Power Supply
Input Voltage
Power
Ba ery Back-Up
22-32 VDC (28 VDC Typ.) per MIL-STD-704D
< 30 Watt @ 28 VDC ( warm-up)
< 14 Wa @ 28 VDC @ 25°C (steady-state)
External power input for ba ery back-up via the main power inlet
Automa cally operated when the main power reduces to 24 VDC
Page 2 of 8
Vectron Interna onal • 267 Lowell Road, Suite 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • h p://www.vectron.com
Rev 1.0 Oct 2014
Performance Specifica ons
(con
nued)
Industrial GPS Receiver (MIL-P (Y) code as an op on)
Tracking
Posi on
Posi on Accuracy ( Lat long )
Posi on Accuracy ( Alt )
GPS Antenna DC Voltage
Acquisi on Time
L1 frequency (1575 MHz), C/A code 12 parallel tracking channels
L1/L2 frequency P(Y) code SAASM 12 parallel tracking channels as an op on (For more informa on contact factory)
Lat., long., alt.
6m CEP (50%) w/o SA
11m CEP (50%) w/o SA
5V
Warm start 45 second, Cold start < 50 second (worst case)
Dimensions & Weight
Dimensions
weight
245 mm (w) x 166 mm (h) x 56 mm (d)
1.5 Kg
Environmental
Temperature
Temperature Al tude
Humidity
2.45gRMS as per the following profile:
Opera ng:-25°C to +65°C (-40°C to +65°C Opt.)
Emergency: +71°C for 60 minutes
Storage: -40°C to +71°C
-40°C to +65°C (+71°C for 60 minutes) 0 to 60,000
95% non condensing
Random Vibra on
(Without vibra on absorbers. For more details on
the vibra on absorbers op on – please see the
Accessories chapter below)
Mechanical Shock - Opera on
Mechanical Shock - crash
Bench Handling Shock
Rain
Dust
Salt Atmosphere
Bonding
EMI / RFI
MIL-STD-810C/E, Method 516.2, Proc. 1 (15g / Half sine/ 3 axis/ 6 shocks per axis(
X-40G, Y-15G, Z-20G, 11ms, Half Sine, Total 12 shocks
MIL-STD-810C/E, Method 516.2, Procedure V
MIL-STD-810E Method 506.3 procedure I
MIL-STD-810E Method 510.3
MIL-STD-810E, Method 509.3, Procedure I
≤2.5
mΩ
MIL-STD-461B/C Part: 5 (CE01, CE03, CE07, RE02, CS01, CS02, CS06, RS02, RS03)
Reliability, Maintainability, Testability
MTBF
MTTR – O Level
MTTR – I Level
BIT (Built In Test)
> 20,000 hours @ 30°C, ARW, MIL-HBK-217F
12 min. to replace failed unit (including warm-up time)
34 min. to replace failed module (including warm-up me)
On-line BIT – Automa c, Covers 90% of all failures
Page 3 of 8
Vectron Interna onal • 267 Lowell Road, Suite 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • h p://www.vectron.com
Rev 1.0 Oct 2014
Performance Specifica ons
(con
Principles of Opera on
nued)
The following block diagrams depict the opera on of the AR-51-07. The unit includes Rubidium Standard and accepts Input from internal
GPS receiver, external 1PPS or external TOD (H.Q). All outputs are derived from the internal Rubidium Clock, which is phase locked by a
digital PLL to the selected input. Thus, the Rubidium Clock - frequency and me - follows the GPS on the long term average. If GPS recep on
is lost for short or long periods of me the Rubidium Clock shall maintain accurate me and frequency with no phase interrup on.
Data
fl
ow & Inputs Selec on
Rubidium-GPS D-PLL and Inputs
Typical Performance Plots
Typical me error
fl
uctua ons when disciplined to GPS
Typical me error in Holdover (without GPS)
Typical Performance Plots
Page 4 of 8
Vectron Interna onal • 267 Lowell Road, Suite 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • h p://www.vectron.com
Rev 1.0 Oct 2014
Performance Specifica ons
(con
Mechanical ICD
nued)
Electrical ICD
Connector
J1 - Supply
TOD TTL/100K ohm x 5
1 PPS PTTI x 5
1 PPS RS-422 x 4
1 PPS TTL/50 ohm x 1
Aux RS-422 x 1
J2 - Signals
CLI RS-232 x 1
1PPS ICD-GPS-060 x 1
TOD TTL/100K ohm x 1
MUX-Bus Address
Overall BIT
GPS crypto keys
J3 - MUXBUS
J4 - 10MHz OUT
J5 - 1PPS OUT
J6 - ANT IN
J7 - AUX OUT
MIL-STD-1553RT, Female
Sine-wave, 8 ±3dBm, 50Ω, SMA, Female
TTL/50 ohm, SMA, Female
L1/L2, TNC, 50Ω, Female
1PPS TTL/50 ohm (RAW), SMA, Female,
I/O
OUT
OUT
OUT
OUT
OUT
IN/OUT
IN/OUT
IN
IN
IN
OUT
IN/OUT
IN/OUT
OUT
OUT
IN
OUT
Page 5 of 8
Vectron Interna onal • 267 Lowell Road, Suite 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • h p://www.vectron.com
Rev 1.0 Oct 2014
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