Model 1095A/C Industrial GPS Clock (250 ns)

Precision GPS timing source for industrial applications in a compact, rugged enclosure, suitable for indoor and outdoor applications.

Model 1095A/C User Manual
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Model 1095A/C Quick Setup Guide
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Model 1095A/C Data Sheet
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Model 1095A/C Data Sheet Español
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GNSS Antenna Data Sheet
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Rugged, accurate and economical, the 1095A/C GPS Industrial Clock Module from Arbiter Systems^®, Inc. is the engineer's choice when flexibility, precision and physical durability are required.

The 1095A/C precision time clock is a low cost unit capable of driving common timing signals such as IRIG-B, 1PPS and RS-232 serial time codes, with < ± 100 ns typical accuracy. The compact, rugged enclosure can be mounted in multiple ways, making installation fast and secure. Ideal for outdoor applications, the 1095A/C is capable of performing when other units fail, operating between - 40 °C and 85 °C. Four configurable outputs support substantial drive capability, allowing a single unit to drive multiple loads in parallel.

The 1095A/C maintains the real-time clock, almanac and ephemeris data powered by a back up battery in the case of power loss, reconnecting to the satellite signal in as little as 15 seconds. The built in Event Capture function means the unit records key events related to data received from the input options, with 100 ns resolution.

Choose between the standard internal and optional external antenna to best suit your installation environment.

Model 1095A/C supports front panel options. See photos and Key Features tab below for more information.

Accéder au résumé en français

Key Features
Specs
Options
Accessories
Software
Firmware
Related Resources

Internal GPS antenna
Rugged case for outdoor or demanding environments
Accuracy < ± 100 ns typical; < ± 250 ns worst case
Four terminal strip connector outputs, three high drive, one analog
Two RS-232 ports
One Form C (SPDT) fail-safe relay
Battery or power source operated

Versions A/C offer various interface options (see photos):

External GPS antenna
1095A utilizes an opaque cover, optionally may be ordered with a "smoked' cover
1095C includes a "smoked" cover with four LEDs to monitor operating status and a large seven-segment LED time display
IEEE C37.118-2005 compliant for Synchrophasor use.

Receiver Characteristics

Timing Accuracy

Accuracy Note	Specifications apply at the 1 PPS output, IRIG-B Level-Shift and Programmable Pulse outputs, with US Department of Defense Selective Availability (SA), as of date of publication.
Accuracy UTC/USNO	± 250 ns peak; < ± 100 ns typical (SA off)

Position Accuracy

10 meters, rms, 90 % confidence

Satellite Tracking

Twelve (12) channel, C/A code (1575.42 MHz). Receiver simultaneously tracks up to twelve satellites.

Acquisition

150 seconds typical, cold start
15 minutes, 90 % confidence, cold start
40 seconds, with almanac less than 1 month old
15 seconds, with ephemeris less than 4 hours old

I/O Configuration

Output Connectors

Four Total: three high-drive 5 Vdc (250 mA at > 4 V), one analog (4.5 Vpp), terminal strip connectors.

Output Signals

Output 1: Programmable Pulse A
Output 2: IRIG-B00x level-shift
Output 3: Programmable Pulse B
Output 4: Modulated IRIG-B

Programmable Pulse Output

Two programmable pulse outputs (5 Vdc), PPA and PPB.

Modes:

1 PPS
Every 1 seconds to 60,000 seconds, starts top of the minute
Hourly at a specified offset
Daily at a specified time of day
One shot at a specified time of year
1 PPS to 1000 PPS squarewave (PPB only)
Aux IRIG Mode (PPB only)

Pulse duration is programmable from 0.01 seconds to 600 seconds, except in one-shot mode, where the output is Low prior to the specified time and High thereafter.
Aux IRIG Mode provides an additional unmodulated IRIG-B signal on the PPB output.

Relay Contacts

One, Form C (SPDT) fail-safe, 0.3 A at 130 Vdc; jumper selectable to Fault, Out-of-lock, Programmable Pulse A (PPA), Programmable Pulse B (PPB), Stabilized, and Event-In functions. Fail-safe means the relay indicates "fault" or "unlocked" condition with power off.

Event Inputs

One opto-isolated event capture input with 100 ns resolution, terminal strip inputs for 5 Vdc to 12 Vdc, 24 Vdc to 48 Vdc, and 120 Vdc to 240 Vdc nominal input.

Interface

Operator

Display	1095C Display: 6-digit LED Time of Day (20 mm)
Status LEDs	Operate (green) Stabilized (green) Unlocked (red) Fault (red)
Setup	Via remote interface: Local time offset IRIG Setup: Local/UTC/IEEE 1344 Daylight Saving Time: On/Off/Auto (Configurable) LED Brightness control Event input: Event/1 PPS deviation Programmable Pulse setup Antenna cable delay Out of lock time: 1 minute to 99 minutes, Off, or Zero Delay Auto-Survey Relay Control RS-485 Output Serial port2: RS-232 Serial port2: RS-232 (DIP switches)

System

RS-232	1200 baud to 115,200 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity (TXD, RXD, COM)
RS-422/485	Transmit only, to drive multiple devices. Available Signals include: Serial Port 1, Serial Port 2, IRIG-B, PPA, PPB, and 1 PPS.
Broadcast modes	Standard ASCII (IRIG-J) Extended ASCII ASCII with Time Quality ASCII with Time Quality and Year Vorne large-display time Status (output on change of status) Configurable Serial Time Code Event

Power Requirements

Standard

Voltage	9 Vdc to 30 Vdc, 3 W maximum; negative common; 3.81 mm pluggable terminal strip.

General

Physical

I/O Port: Accepts up to a 16 conductor cable with an OD from 6 mm to 12 mm (0.24 in to 0.47 in)

Size	180 mm x 120 mm x 60 mm (7.1 in x 4.7 in x 2.4 in) plus cable gland
Weight	1 kg (2.2 lbs), net 2 kg (4.4 lbs), shipping
Antenna	Built-in or optional external
Antenna Mounting	4 mounting feet included

Environmental

Temperature	Operating: - 40 °C to + 85 °C
Humidity	Noncondensing
EMC	Radiated susceptibility: passes walkie-talkie test.

Degree of Protection

IP65 (IEC 60529), NEMA 1, 2, 4, 4x, 12, 13

Certificates and Approvals

CE mark/label and certificate

General
1095Aopt02	Smoked Enclosure Cover (1095A)
Antenna
1095Aopt01	External Antenna (1095A)
1095Copt01	External Antenna (1095C)

Included
AS0048900 ¹	Antenna Grounding Block Kit, RoHS
AS0067200	Programming Port Cable with adapter
AS0099200 ¹	Arbiter Universal GNSS Antenna
HP0022601	Sealing Cable Port (6 mm to 12 mm)
PD0052900	Quick Setup Guide (1095)
Available
AP0003400 ²	BNC (Male) Breakout to 100 mm Wires
AP0007700	Modular DB-9 to RJ-11 Adapter, Preconfigured
AP0008900 ³	BNC (Female) Breakout to 100 mm Wires
AP0013100	Wall-mount Power Supply: 110 Vac to 120 Vac, 50 Hz to 60 Hz; 9 Vdc, 0.66 A
AP0013200 ⁴	Power Supply: 100 Vac to 240 Vac, 50Hz to 60 Hz, IEC-320; 9 Vdc, 1 A
AP0014900 ⁵	BNC (Female) Breakout to Screw Terminal
AP0015000 ⁶	BNC (Male) Breakout to Screw Terminal
AS0044600	Antenna Mounting Kit
AS0093700	Model 1095A/C DIN Rail Mounting Assembly
AS0094400 ⁷	Power Supply 18-72 Vdc; 12 Vdc, 0.833 A
AS0094402 ⁸	Power Supply 18-72 Vdc; 12 Vdc, 0.833 A, with DIN Rail Mounting
AS0094500	GNSS Surge Arrester
AS0096400	Operation Manual (1095)
AS0096800 ⁹	Power Supply 85-264 Vac RMS or 110-370 Vdc; 12 Vdc, 0.9 A
AS0112400	Wall-mount Power Supply: 120 Vac, 60 Hz; 12 Vdc, 0.8 A
CA0021302 ¹⁰	2 m (6 ft) RG-6 Antenna Cable, RoHS
CA0021306 ¹¹	6 m (20 ft) RG-6 Antenna Cable, RoHS
CA0021315 ¹⁰	15 m (50 ft) RG-6 Antenna Cable, RoHS
CA0021330 ¹⁰	30 m (100 ft) RG-6 Antenna Cable, RoHS
CA0021338 ¹⁰	38 m (125 ft) RG-6 Antenna Cable, RoHS
CA0021345 ¹⁰	45 m (150 ft) RG-6 Antenna Cable, RoHS
CA0021350 ¹⁰	50 m (164 ft) RG-6 Antenna Cable, RoHS
CA0021360 ¹⁰	60 m (200 ft) RG-6 Antenna Cable, RoHS
CA0021375 ¹⁰	75 m (250 ft) RG-6 Antenna Cable, RoHS
CA0023600	RJ-11 Cable Four-Pin Crossed, 2 m (7 ft)
CA0031900	2 m (6.5 ft) 2 Wire, 22 AWG Cable, Bare to Bare
CA0031901	2 m (6.5 ft) 2 Wire, 22 AWG Cable, Bare to Spade
CA0031902	2 m (6.5 ft) 2 Wire, 22 AWG Cable, Bare to 3.5 mm Male Plug
CA0031903	2 m (6.5 ft) 2 Wire, 22 AWG Cable, Spade to 3.5 mm Male Plug
CA0032000	2 m (6.5 ft) 3 Wire, 22 AWG Cable, Bare to Spade
CA0032001	2 m (6.5 ft) 3 Wire, 22 AWG Cable, Spade to Spade
CN0027700	Type F, Male, RG-6 Antenna Cable Crimp-on Connector, non-RoHS
CN0027800	Type F, Male, RG-11 Antenna Cable Crimp-on Connector, non-RoHS
CN0050700	Type F, Male, RG-6 Antenna Cable Compression Connector, RoHS
CN0050800 ¹²	Type F, Male, RG-6 Plenum Rated Antenna Cable Compression Connector, RoHS
CN0051300	Type F, Male, RG-11 Antenna Cable Compression Connector, RoHS
HP0022602	Sealing Cable Port: (5 mm to 9 mm)
TF0006000	Type F, RG-11 Antenna Cable Crimp Tool
TF0006400	Type F, RG-6 Antenna Cable Crimp Tool
TF0013200	Antenna Cable Stripping Tool, RG-6
TF0013300	Antenna Cable Stripping Tool, RG-11
TF0024000	Type F, RG-6 Antenna Cable Compression Tool
TF0024100	Type F, RG-11 Antenna Cable Compression Tool
WC0004900 ¹⁰	300 m (1000 ft) Roll RG-11 Cable, RoHS
WC0005000 ¹⁰	300 m (1000 ft) Roll RG-6 Cable, RoHS
WC0005200 ¹³	300 m (1000 ft) Roll RG-6 Plenum Rated Cable, RoHS
WC0006400	22-12P STR TNC 150 V 80 C Unshielded Cable

¹ Included only when Opt01 is ordered
² Converts female BNC-terminated coaxial cable to pair of wires.
³ Converts male BNC-terminated coaxial cable to pair of wires.
⁴ Requires additional cabling for a complete solution. Recommendation: P01 - P10.
⁵ Converts pair of wires to female BNC.
⁶ Converts pair of wires to male BNC.
⁷ DIN Rail Mounting Kit Not Available. Requires additional cabling for a complete solution. Recommendation: CA0031901 and CA0031902.
⁸ DIN Rail Mounting Kit Available. Requires additional cabling for a complete solution. Recommendation: CA0031901 and CA0031902.
⁹ DIN Rail Mounting Kit Available. Requires additional cabling for a complete solution. Recommendation: CA0032001 and CA0031903.
¹⁰ Stocked length. Custom lengths available from 0.3 m (1 ft) to 300 m (1000 ft). Contact factory.
¹¹ Included only when Opt01 is ordered. Default:Stocked length. Custom lengths available from 0.3 m (1 ft) to 300 m (1000 ft). Contact factory.
¹² Indoor use only. Not weather resistant. Not UV radiation protected.
¹³ Stocked length. Custom lengths available from 0.3 m (1 ft) to 300 m (1000 ft). Contact factory. Indoor use only. Not weather resistant. Not UV radiation protected.

Click to Download Latest Version of Software
1095_Utility_02Apr2010_0750	View and modify configuration settings.
1095_Utility_SHA256_02Apr2010_0750	1095_Utility SHA256 checksum
Tera Term_01Jan2010_23	Terminal program that can capture data from Models 930A and 931A. Also, can program the Satellite Clocks via serial commands. Modern version is available from their website: https://teratermproject.github.io/index-en.html
Tera Term SHA256_01Jan2010_23	Tera Term SHA256 checksum

Software Version and Related Information

Model 1095A/C Utility Application

Using Model 1095A/C Utility Application software (1095utility_vxxxx.exe):

The xxxx refers to the version number of the 1095A/C Utility
Connect the 1095A/C to the computer
Run 1095utility_vxxxx.exe
Click the Version tab
If the data is blank then click Unit > Read

1095 GUI Utility Software (1095_Utility)

The software interface specifically written for the Model 1095B/C.

Allows configuration of Model 1095B/C
Supports viewing and modification of existing configuration on Model 1095B/C from your PC.
Saves the existing configuration file from the 1095B/C to your PC.
Compatible with Windows 7 and 10

Windows 10

Windows 10 does not play nice with the 1095_Utility as is. The workaround:

Download this zip file of the 1095_Utility files 1095utility_v0750.zip
Compare the SHA256 file checksum
Unzip the file in an executable location such as Documents
Find/open the unzipped folder
Double-click on the 1095.exe
If there is only one COM port and it is not selectable from the utility then you can manually edit the 1095util.cfg file.
1. Close the utility
2. Open 1095util.cfg with Notepad
3. Scroll toward the bottom - looking for 'port' and 'COM1' (most likely)
4. Change the COM1 to the necessary port number
5. Save the file
6. Open the utility and the correct COM port should be listed. Change the baud as necessary from within the utility. Default is 9600,8,N,1

Version	Rev Level	Version Notes
02Apr2010	0.7.5.0	Verify operation doesn't check the broadcast string if the broadcast mode is not set to custom (aka User) mode. (BZ 611)

1095_Utility_SHA256

Version	Rev Level	Version Notes
02Apr2010	0.7.5.0

Terminal Emulation Program (Tera Term)

Free software terminal emulator (communications program) for Microsoft Windows.

Tera Term (Pro) is a free software terminal emulator (communication program) for MS-Windows.
Supports VT100 emulation, telnet connection, serial port connection, etc.

Tera Term SHA256

Firmware Information (EPROM based firmware is not available for download)
1095_Firmware_04Mar2019	Downloadable. Use the Utility to import file into unit.
1095_Firmware_SHA256_04Mar2019	1095_Firmware SHA256 checksum

Firmware Version and Related Information

Read the release notes BEFORE downloading any firmware.

This software interface is for use only with Model 1095A/C.
Allows user to configure the 1095A/C
Supports reading the existing configuration from the 1095A/C to your PC.
Saves the existing configuration file from the 1095A/C to your PC.
Compatible with Win 98/NT/2000/XP

Firmware Uploader

Required to upload the firmware to the Model 1094B.
Compatible with Windows NT, 2000 and XP

How do I find my firmware revision?

Using Serial Commands:

Start a terminal program such as TeraTem (available for download on this page)
Configure for 9600, 8, N, 1
Press V
Press E
The terminal program should show the firmware revision date in the format dd mmm yyyy.

Using the 1095GUI utility program (1095utility_vxxxx.exe):

The xxxx refers to the version number of the 1095GUI Utility
Connect the 1095A/C to the computer
Run 1095GUI (1095utility_vxxxx.exe)
Click the Version tab
If the data is blank then click Unit > Read

Downloadable firmware upgrade (1095_Firmware)

Version	Rev Level	Version Notes
04Mar2019		Updates are not security related. Fix issue with the IRIG-B output when applying a Leap Second and Daylight Saving Time is active (BZ874). The time zone and straight binary seconds (SBS) do not have the DST applied so there is a large jump in time during the leap second. Time continues as expected after the leap second. The 1094B self corrects but a device synchronized to its IRIG-B may experience time anomalies due to the big jump. This bug is only present during a Leap Second when DST is active. Do NOT load older firmware to the new processor. Just don't try it. Follow the warnings of the firmware updater. Otherwise the Model 1095A/C will cease to function properly. Posted to web site: 06 March 2019.
22May2017		Updates are not security related. Minimized the width of IRIG pulses during cold start. This is to make the IRIG-B output undecodeable until locked to three satellites.
03Apr2017		Updates are not security related. Update Daylight Saving Time (DST) function to properly calculate start and stop days.
16Mar2017		Updates are not security related. Update Daylight Saving Time (DST) pending bit in IRIG-B with IEEE 1344 enabled to start one second into the minute (xx:xx:01) prior to the change. Before this change the bit was set at the top of the minute, xx:xx:00. Leap second fixes: Correctly test for and apply leap seconds Correctly calculate SBS value at leap second application Leap-second pending bit in IRIG-B IEEE 1344 output set at proper time and for the proper duration. The leap second message request updated to only happen the last minute of each month Correcting end of year leap second response.
02Nov2015		DST stop error. Not exiting DST mode properly when "day of week" value matches the first day of the following month (BZ733). Example: DST will not properly stop if DST stop was set to Last Sunday of October and November 1 is also on a Sunday. Fixed the lacking leap second.
08Mar2013		Supports both processor types.
12Dec2011		Daylight Saving Time (DST) configuration changes are now loaded without having to cycle power (BZ 688). Added ability to configure the programmable pulse (seconds per pulse) to 1 second - 1 PPS (BZ 677). Add Extended Relay Start Feature (BZ 685).
06Sep2011		IRIG-B bit position number 70 will now properly change state when the local offset is something other than an even hour (BZ 674).
24Feb2010		Visible satellites can show less than satellites tracked. (BZ 600) Updated version of the display firmware (change brightness settings).
05Jan2010		IRIG-B IEEE 1344 outputs incorrect year (00 instead of 10). (BZ 598)
01Sep2009		Updated to work with new display processor
28Jul2009		Out-Of-Lock relay mirrors Fault relay. (BZ 573) For test purposes, Parity dip switch setting On-On will be used for "Even" parity instead of "None". (BZ 578) Fix serial port configuration latch to match version B (and on) boards. (will now not work correctly with version A boards).
30Jun2009		Fix "DA" output to correctly show minus sign for deviation values between - 0.01 and - 0.99. (BZ 544) Skip rate setting when configuring event broadcast. (BZ 546) Events referenced starts from 1 instead of 0 Event buffer size increased to 300 (was 250) Deviation calculation updated so that it won't be skipped when index pointer is 0. Remove display "Dim" and "Bright" commands (LE command) Enable "TS" command to display front panel time when unlocked (Marketing request)
14Jan2009		Initial release

1095_Firmware_SHA256

Version	Rev Level	Version Notes
04Mar2019

GPS Substation Clock Requirements
Download gps_substation_clock_requirements.pdf (25 kB) »

IRIG-B Time Code Accuracy, IED and System Design Issues
Download irig_accuracy_and_connection_requirements.pdf (31 kB) »

NERC PRC-002 and PRC-018 Compliance Statement
Download pd0042900a_NERC_PRC-002_PRC-018_compliance_statement.pdf (70 kB) »

Time in the Power Industry: How and Why We Use It
Download TimeInThePowerIndustry.pdf (407 kB) »

Why GPS Clocks Are Not Free
Download why_gps_clocks_arent_free.pdf (12 kB) »

App Note 101: Distributing Timing Signals in a High-EMI Environment
Download application_note_101.pdf (90 kB) »

App Note 103: Large Format Displays with Arbiter products
Download application_note_103.pdf (16 kB) »

GPS Antenna Mounting Bracket
Download antenna_mnt_bracket_brief.pdf (462 kB) »

GPS Antenna Mounting Bracket Instructions
Download pd0024700_gps_antenna_mounting_bracket.pdf (580 kB) »

GNSS Antenna Preamplifier Installation Instructions
Download pd0025300_gnss_antenna_preamplifier.pdf (3 MB) »

IRIG Standard 200-16
Download irig-b_200-16.pdf (857 kB) »

IRIG-B Specifications
Download irig_b_spec_brief.pdf (488 kB) »

Model 1095A/C DIN Rail Mounting Assembly Instructions
Download 1095_din_rail_mounting_assembly.pdf (117 kB) »

GNSS Surge Protector Installation Instructions
Download pd0045800_surge_protector_installation_instructions.pdf (110 kB) »

Reducing Overshoot and Ripple in Arbiter Products with High Drive Outputs
Download pd0046200_reducing_high_drive_overshoot.pdf (277 kB) »

Timing Signals, IRIG-B and Pulses
Download pd0043200_timing_signals_overview.pdf (197 kB) »

Catalogo de Productos de Sincronizacion y Frecuencia
Download catalogo_de_productos_de_sincronizacion_y_frecuencia.pdf (312 kB) »

Press Release: Leap Second Anomaly December 2016
Download PD0054900_LeapSecondPressRelease.pdf (70 kB) »

Antenna Cable Assemblies RoHS2 Declaration of Conformity
Download Antenna_Cable_Assemblies_RoHS2_DoC.pdf (286 kB) »