Model 1094B GPS Substation Clock (250 ns)

Includes the most commonly requested features and accuracy ratings for typical substation applications, all at a competitive price point.

Model 1094B User Manual
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Model 1094B Data Sheet
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Model 1094B Data Sheet Espanol
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Combining world-class accuracy with value pricing, Model 1094B delivers as standard the most commonly requested features for substation applications in Arbiter's line of precision timing products.

Standard features include a 12 channel GPS receiver with typical accuracy to < ±100 ns, two serial communications ports, and four standard outputs supporting both BNC and 5 mm terminal strip connections, selectable to output IRIG-B, 1 PPS or programmable pulse A or B functions.

Able to output 5 Vdc, the unit can easily drive multiple loads in parallel, including synchrophasors. GPS Data Back Up battery capable of maintaining the real-time clock, almanac and ephemeris data in the case of power loss.

Key Features
Specs
Options
Accessories
Software
Firmware
Related Resources

Accuracy < ±100 ns typical; < ±250 ns worst case
Four outputs configurable for BNC or 5mm terminal strip connectors
One Form C (SPDT) fail-safe relay
Two RS-232 and RS-422/485 ports available
IEEE C37.118 compliant for Synchrophasor use.

Receiver Characteristics

Timing Accuracy

Accuracy Note	Specifications apply at the 1 PPS output, in the presence of Selective Availability (SA), as of date of publication.
Accuracy UTC/USNO	±250 ns peak; < ±100 ns typical (SA off)

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, each with BNC and 5 mm pluggable terminal strip in parallel.

Output Signals

Jumper selectable to high-drive 5 Vdc (250 mA at > 4 V) selectable to:

IRIG-B00x level-shift,1 PPS orProgrammable Pulse A or B
IRIG-B12x modulated
300 volt MOSFET output.

The MOSFET output is selectable to the same functions as the high drive 5 Vdc output. The MOSFET output is not electrically isolated from instrument common.

Input Connectors

Event A Input:

One opto-isolated event capture input with 100 ns resolution, BNC connector jumper-configurable to 5 to 12, 24 to 48 and 120 to 240 Vdc nominal input. Event input is also jumper-configurable to COM 1 and COM 2 RXD line.

Programmable Pulse Output

Two programmable pulse outputs, PPA and PPB. PPA is available (by a jumper connection) on outputs 1, 2 and COM 1 pin 4 (RS-232) and pins 8 and 9 (RS-485). PPB is available (by a jumper connection) on outputs 3, 4 and COM 2 pin 4 (RS-232) and pins 8 and 9 (RS-485).

Six modes:

Every 1 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 to 1000 PPS squarewave (PPB only)
Aux IRIG Mode (PPB only)

Pulse duration is programmable from 0.01 to 600 seconds, except in one-shot mode, where the output is Low prior to the specified time and High thereafter.

Relay Contacts

One, Form C (SPDT) fail-safe, 0.3A at 130 Vdc; jumper selectable to Fault, Unlocked, or Programmable Pulse A (PPA) functions. Fail-safe means the relay indicates "fault" or "unlocked" condition with power off.

Interface

Operator

Display	2 x 20 character supertwist LCD White LED backlight
Functions	Time: UTC or local Position: latitude, longitude, elevation Clock status 1 PPS (input) deviation Event time
Status LEDs	Operate (green) Stabilized (green) Unlocked (red) Fault (red)
Keyboard	Eight keys
Setup	Local time offset IRIG-B: Local/UTC/1344 Daylight Saving Time: On/Off/Auto Backlight control: On/Off/Auto Event input: Event/1 PPS deviation Programmable Pulse setup Antenna cable delay Out of lock time: 1 to 99 minute(s), Off, or Zero Delay Auto-Survey Serial port: RS-232

System

RS-232	1200 to 38,400 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity
RS-422/485	Transmit only, to drive multiple devices. Two outputs. Uses extra pins on Com 1 and Com 2.
Broadcast modes	Standard ASCII (IRIG-J) Extended ASCII ASCII with Time Quality ASCII with Time Quality and Year Vorne large-display time Status Event
Connector	2 Male 9-pin D-sub Com 1 and Com 2(TXD, RXD, AUX IN, AUX OUT)

Power Requirements

Standard

Voltage	85 to 264 Vac, 47 to 440 Hz, 20 VA maximum or 110 to 350 Vdc, 15 W maximum
Inlet	IEC-320 with fuse and mating cordset. Specify option P01 - P10 Available cordset plug style and specifications are described in the Options and Accessories section.

General

Physical

Size	1 RU rack mount or tabletop, 260 mm deep FMS, Rack mounts included. 508 x 381 x 203 mm (20 x 15 x 8 in.), shipping
Weight	2 kg (4.5 lbs), net 5.5 kg (12 lbs), shipping
Antenna	Cable Connection: F-type Size: 77.5 dia. x 66.2 mm (3.05 x 2.61 in.) Weight: 170 grams (6.0 oz)
Antenna Cable	Type: RG-6, 15 m (50 ft) provided Weight: 0.69 kg (1.52 lbs) per 15 m
Mounting	0.75 in. pipe (1 in. - 14 marine) thread

Environmental

Temperature	Operating: 0 °C to +50 °C (-20 °C to +70 °C typical) Nonoperating: -40 °C to +85 °C
Humidity	Noncondensing
EMC	Radiated susceptibility: passes walkie-talkie test. Conducted emissions: power supply complies with FCC 20780, Class A and VDE 0871/6.78 Class A. Surge withstand capability (SWC), power inlet: designed to meet ANSI/IEEE C37.90-1 and IEC 801-4

Certificates and Approvals

CE mark/label and certificate

The available power options are listed below and are described in the Options and Accessories section, see our Product Catalog.Options and Accessories Options and Accessories section.

Power
1094Bopt07	IEC-320 Power Inlet 85 to 264 Vac RMS, 110 to 370 Vdc
1094Bopt08	10 to 60 Vdc Terminal Power Strip and Surge Withstand
1094Bopt10	85 to 250 Vac RMS, 110 to 350 Vdc Terminal Power Strip and Surge Withstand

Included
AS0028200	19 Inch Rack Mount Kit
AS0083400	Operation Manual (1094)
AS0087800	Arbiter Universal GPS Antenna
CA0021315	15 m (50 ft) RG-6 Antenna Cable
P01-P10 ¹	Country specific power cord with straight female end
Available
AP0003400	BNC (Male) Breakout to 100 mm Wires
AP0008900	BNC (Female) Breakout to 100 mm Wires
AP0013400	GPS Antenna Cable Splitter, F-Type, 950-2150 MHz, One Port Pass DC
AS0033100	Rack Slide Kit
AS0044600	GPS Antenna Mounting Kit
AS0044700 ²	21 dB In-Line Pre-amplifier
AS0048900	Antenna Grounding Block Kit
AS0056600	24 Inch Rack Mount Kit
AS0094500	GPS Surge Protector
CA0019806	RS-232 Null Modem Cable, DB9F-DB9F, 2 m (6 ft) length
CA0021302	2 m (6 ft) RG-6 Antenna Cable
CA0021306	6 m (20 ft) RG-6 Antenna Cable
CA0021330	30 m (100 ft) RG-6 Antenna Cable
CA0021345	45 m (150 ft) RG-6 Antenna Cable
CA0021360	60 m (200 ft) RG-6 Antenna Cable
CA0021375	75 m (250 ft) RG-6 Antenna Cable
CN0027700	Type F, Male, RG-6 Antenna Cable Crimp-on Connector
CN0027800	Type F, Male, RG-11 Antenna Cable Crimp-on Connector
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
WC0004900	300 m (1000 ft) Roll RG-11 Cable
WC0005000	300 m (1000 ft) Roll RG-6 Cable

¹ Only applies if Power Option 07 is ordered
² Used for cable lengths greater than 75m (250ft)

Click to Download Latest Version of Software
1094_Utility_19Aug2009_0940	View and modify configuration settings.
109x_Loader_24Feb2010_0800	Used to upload firmware specific to Models 1094 and 1095.
Arbiter Time Service_01Jan2010_1500	PC Clock Synchronization Service for WIN NT/2000/XP/Vista/7. Not compatible with WIN 8.
Tera Term_01Jan2010_23	This is a very good HyperTerminal replacement. Able to capture data from Models 930A and 931A. Also able to program the GPS Satellite Controlled Clocks via serial commands.

Software Version and Related Information

1094 GUI Utility Software (1094_Utility)

The software interface specifically written for the Model 1094B.

Allows configuration of Model 1094B
Supports viewing and modification of existing configuration on Model 1094B from your PC.
Saves the existing configuration file from the 1094B to your PC.
Compatible with Windows 98, Windows NT, Windows 2000, Windows XP, Vista, Windows 7

Version	Rev Level	Version Notes
19Aug2009	0.9.4.0	Migrated changes in 1095 to 1094. (BZ 579 and 580) Non abbreviated strings for Prog Pulse Mode, Prog Pulse Type. UI layout change - Frequency dropdown box now show/hides in place of Type, Polarity, Time Selection

Firmware uploader for Models 1094 and 1095 (109x_Loader)

Version	Rev Level	Version Notes
24Feb2010	0.8.0.0	109x uploader typo (Change "Coose" to "Choose"). (BZ 606) Update Linux serial port search to work with Debian

Arbiter Time Service Tool (Arbiter Time Service)

PC Clock Synchronization Service for WIN NT/2000/XP/Vista/7. Not compatible with WIN 8. The Arbiter Time Service installs on Microsoft^® Windows NT/2000/XP and runs as a service to keep the PC clock synchronized to an Arbiter GPS clock. The Arbiter Time Service connects with an RS-232 cable and interrogates the clock for the time signal

Version	Rev Level	Version Notes
01Jan2010	1.5.0.0

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.
Compatible with Windows 98, Windows NT, Windows 2000, Windows XP, Vista, Windows 7

Firmware Information (EPROM based firmware is not available for download)
1094_Firmware_05Dec2011	Downloadable. Use 109x_Loader to import file into unit.

Firmware Version and Related Information

Read the release notes BEFORE downloading any firmware

IMPORTANT: The firmware can only be updated if you have a firmware version of at least 2008. If your version is pre-2008, contact technical support for assistance. See below for instructions how to check your version number.

Firmware Uploader

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

Firmware Release Notes

IMPORTANT: The firmware can only be updated if you have a firmware version of at least 2008.

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 1094GUI utility program (1094utility_vxxxx.exe):

The xxxx refers to the version number of the 1094BGUI Utility
Connect the 1094B to the computer
Run 1094GUI (1094utility_vxxxx.exe)
Click the Version tab
If the data is blank then click Unit > Read

Contact Technical Service if your current firmware is prior to 2008.

Downloadable Firmware (1094_Firmware)

Version	Version Notes
05Dec2011	Daylight Saving Time (DST) configuration changes are now loaded without having to cycle power (BZ 688).
13Oct2011	Added ability to configure the programmable pulse (seconds per pulse) to 1 second - 1 PPS (BZ 676). Add Extended Relay Start Feature (BZ 684).
06Sept2011	IRIG-B bit position number 70 will now properly change state when the local offset is something other than an even hour (BZ 674).
26Jul2011	Update to time quality functionality. Time quality no longer displays locked, maximum accuracy immediately after reacquiring satellites
14Oct2010	IRIG-B Time quality bits enabled when 1344 disabled. (BZ 619) Ability to configure EVENT capture to local/UTC from front panel. (BZ 553) The SE command's timeout value ("T=x") is always 0. (BZ 605) Minor menu fix. (BZ 618)
23Aug2010	Minor menu fix. (BZ 618)
05Jan2010	IRIG-B IEEE 1344 outputs incorrect year (00 instead of 10). (BZ 597)
17Nov2009	Number of visible satellites not properly returned using seial commands. (BZ 593)
21Oct2009	Update LCD display initialization. Addresses an infrequent, intermittent LCD initialization problem when powered-up from plugging in the power cord (power switch on and plugging in power cord).
30Jun2009	Can now configure Event Time (Local or UTC) from front panel. (BZ 569)
08Jun2009	Seconds per pulse mode drops setting, greater than 600 seconds, upon power cycle. (BZ 567)
09Mar2009	Add NGTS broadcast Enable TS command to display front panel time when unlocked.
15Jan2009	Add check for correct number of parameters to all serial commands that require input parameters. Add check to make sure the broadcast is active in the broadcast service routine. Update UART xmit timeout to be based on time instead of count. Enable use of Xmit FIFO's Remove TF0 I2C use for timeout (timer wasn't being used) Fix "Single" programmable trigger mode for channel B Add new custom broadcast functionality. (BZ 525) 1344 parity bit fixed. (BZ ) Fix "Relay Fault" output. (BZ 528) Force NMEA-0183 GLL broadcast to always be UTC time reference. (BZ 531) Fix "DA" output to correctly show minus sign for deviation values between -0.01 and -0.99. (BZ 544) Backlight setup fix. (BZ 542) Correct event system (BZ 539 and 540)) Skip rate when setting up 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. Add missing keylock functionality
31Jul2008	Fix unlock time error. (BZ 509) Correct event local time calculation for local time offsets greater than +9 hours and less than -9 hours. (BZ 516) Updated IRIG-B code to use index bit for Pr+980ms bit time (Broke in version 02 May 2008). (BZ 518) Fix slow code programmable pulse output. (BZ 521) Add Seconds-Per-Pulse functionality to programmable pulse mode. (BZ 522) Speed-up event format routine: Check for "No Data" moved before time formatting Broadcast configuration structure cleanup. Remove "," before seconds value in "1DG" broadcast message Various code cleanup
16Jan2008	Add in application firmware update capability. The 1094 can now have its firmware updated by using either of the rear serial ports (doesn't require the interface card).

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-08 Compliance Statement
Download pd0042900a_NERC_PRC-018_compliance_statement.pdf (75 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 (68 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) »

GPS Antenna Preamplifier Installation Instructions
Download pd0025300a_gps_antenna_preamplifier.pdf (153 kB) »

IRIG Standard 200-04
Download irig-b_200-04.pdf (3 MB) »

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

Chassis Dimensions
Download chassis.pdf (27 kB) »

Clock Option Selection Guide
Download clock_option_selection_guide.pdf (20 kB) »

Clock Selection Guide
Download clock_selection_guide.pdf (21 kB) »

GPS Surge Protector Installation Instructions
Download pd0045800_surge_protector_installation_instructions.pdf (80 kB) »

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

Catalogo de Productos de Sincronizacion y Frecuencia
Download catalogo_de_productos_de_sincronizacion_y_frecuencia.pdf (216 kB) »