Model 1088B GPS Satellite Clock (40 ns) - DISCONTINUED
Model 1088B GPS Satellite Clock (40 ns) - DISCONTINUED
Setting the standard by which other precision time clocks are measured, Model 1088B features unprecedented accuracy, maximum flexibility and proven reliability.
![](/images/zoom_more.gif)
![](/images/documentation.gif)
Model 1088B User Manual
Download PDF(6 MB) »
Model 1088B Quick Setup Guide
Download PDF(581 kB) »
Model 1088B User Manual Español
Download PDF(1 MB) »
Model 1088B Data Sheet
Download PDF(466 kB) »
Model 1088B Data Sheet Español
Download PDF(321 kB) »
GNSS Antenna Data Sheet
Download PDF(4 MB) »
Leading the precision time clock industry, Arbiter's top-of-the-line Model 1088B offers unprecedented accuracy, flexibility, and reliability for applications in precision timing.
Model 1088B delivers GPS timing accuracy of 100 ns rms from UTC/USNO. Typical performance is less than 40 ns RMS. Need complete resistance to loss of GPS synchronization? The 1088B supports an interconnection to a second 1088B providing fail-safe redundancy.
If your application demands maximum versatility, look no further than the 1088B. Standard input/output (I/O) capabilities provide over 260,000 possible configurations, with 22 available signals. Featuring a second option board slot found only on the 1088B, the number of configurable options grows even further. Options include an internal Network Time Protocol (NTP), four configurable fiber optic outputs, COMTRADE Sample Rate Generator, Power System Time, Frequency and Phase Monitor, a second RS-232 port and more.
- More configuration options than any other clock
- Highest accuracy, < ± 40 ns RMS typical; < ± 100 ns worst case
- Four user configurable BNC connectors supporting multiple output functions including IRIG-B modulated, 1 PPS, Programmable Pulse, IRIG-B Modified Manchester, and more.
- Fiber Optic support
- NTP compatible
- Two Form C (SPDT) fail-safe relays, locked and jumper selectable
- Two Event Inputs (Channel A and B) included
- IEEE C37.118-2005 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 |
|
Synchronization
- CMOS output signals are synchronized to the 1 PPS output, ± 50 ns, maximum.
- IRIG-B modulated, ± 1 us, maximum
- The leading edge of the start bit of a received RS-232 data message may be selected to trigger the Event a input, providing synchronization with 100 ns resolution.
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. Results from all tracked satellites are averaged in Position-Hold Mode or, with Position-Hold Mode off, using least-squares estimation.
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
- The GPS Data Backup Battery is included in the Model 1088B. This feature improves acquisition time by supplying constant power to the real-time clock and RAM in the GPS receiver module.
I/O Configuration
Output Connectors
- Four, BNC, user-configurable. Each connector is configurable as a specific input function or as any one of 22 output functions, listed below, by means of internal, push-on jumpers. Each output connector is independently buffered. Configuration is easily changed in the field. Refer to the options section for more outputs.
- Analog outputs are op-amp (LF353) followers with 560-ohm protective resistors.
- CMOS outputs are buffer type (74HC126) with 47-ohm source resistors.
Output Signals
Analog:
- IRIG-B, 1 kHz modulated, 10 Vp-p
- 1 PPS deviation; ± 5 V at 10 µs/V
5 V CMOS:
- IRIG-B, IRIG-E, IRIG-D, or IRIG-H, level-shift
- 1 PPS, 1 PPM, 1 PPH
- 1 PPS, 10 PPS, 50 PPS, 60 PPS, or 100 PPS
- 1 kPPS, 10 kPPS, or 100 kPPS
- 1 MPPS, 5 MPPS, or 10 MPPS
- Locked
- Programmable Pulse
- IRIG-B Modified Manchester (IEEE Standard 1344)
Programmable Pulse Output
Four modes:
- Every 1 second 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
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.
Event Inputs
Two inputs are available, each having a 100 ns timing resolution. Each input may be configured to accept an external 1 PPS signal, and measure the deviation from 1 PPS/GPS or to record up to 300 sequential events (separated by 11 ms). Event data is logged in battery-backed RAM and may be read or cleared from the front panel or RS-232 interface.
Input Functions
Channel A | Event or 1 PPS: 5 V TTL/CMOS level |
Channel B | Event or 1 PPS: 5 V TTL/CMOS level |
Freq. Reference | 5 V TTL/CMOS or AC-coupled; 100 kHz, 1 Mhz, 5 MHz, or 10 MHz |
Interface
Operator
Display | 2 character x 20 character supertwist LCD |
Functions |
|
Status LEDs |
In addition, when Option 10 (Clock Backup Battery) is ordered:
|
Keyboard | Eight keys |
Setup |
|
System
Includes first serial port, second RS-232 port available (1088opt17A)
RS-232 | 1200 baud to 19,200 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity |
Broadcast modes |
|
Connector | Male 9-pin D-sub (TXD, RXD) |
Power Requirements
Standard
Voltage | (IEC-320 Power Inlet) 85 Vac to 264 Vac, 47 Hz to 440 Hz, 20 VA maximum, 110 Vdc to 370 Vdc, 15 W maximum |
Inlet | (IEC-320 Power 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. |
Weight | 2 kg (4.5 lbs), net |
Antenna |
|
Antenna Cable |
|
Environmental
Temperature | Operating: 0 °C to + 50 °C (- 20 °C to + 70 °C typical) |
Humidity | Noncondensing |
EMC |
|
There are two internal option slots in the Model 1088B and options fit into two categories: those that require internal option slot space, and those that do not. Only one option may occupy the individual Option Slots. Available options are listed below and described in the Options and Accessories section.
I/O | |
---|---|
1088opt04 1 | Parallel BCD Output, 1 ms Resolution (1088B) |
1088opt17 1 | Parallel BCD with Second RS-232 Port |
1088opt17A 1 | Second RS-232 Port (1088B) |
1088opt18 1 | Self-Monitor, IRIG-B Distribution System and Redundant Control with Second RS-232 Port |
1088opt19 1 | Out-of-lock Relay 1 Form C SPDT [1088B] |
1088opt20A 2 | Four Configurable Fiber-Optic Outputs |
1088opt23 2 | COMTRADE Sample Rate Generator |
1088opt27 1 | 8-Channel High Drive IRIG-B Output |
1088opt28 2 | Power System Time, Frequency, and Phase Monitor |
1088opt29 1 | Four Additional Outputs with Dry Contact and + 25/50 Vdc |
1088opt34 1 | Network Time Protocol (NTP) / Precision Time Protocol (PTP) Server |
1088opt36 2 | Four Configurable Outputs |
General | |
1088opt01 | LCD Backlight |
Power | |
1088opt07 | 85 Vac to 264 Vac RMS, 110 Vdc to 370 Vdc Terminal Power Strip (1088B) |
1088opt08 | 10 Vdc to 60 Vdc Terminal Power Strip and Surge Withstand (1088B) |
1088opt15A | 110 Vdc to 170 Vdc Terminal Power Strip and Surge Withstand (1088B) |
1088opt15B | 110 Vdc to 300 Vdc Terminal Power Strip and Surge Withstand (1088B) |
1 Uses Option Slot B
2 Uses Option Slot A
All Arbiter products are shipped with standard accessories as described on each product page. Additional accessories may also be ordered during the initial sale or afterward. Contact Arbiter technical support for additional information.
Included | |
---|---|
AS0028200 | 19 Inch Rack Mount Kit |
AS0099200 | Arbiter Universal GNSS Antenna |
CA0021315 1 | 15 m (50 ft) RG-6 Antenna Cable, RoHS |
P01 - P10 2 | Country specific power cord with straight female end |
PD0052600 | Quick Setup Guide (1088) |
Available | |
AP0003400 3 | BNC (Male) Breakout to 100 mm Wires |
AP0007700 4 | Modular DB-9 to RJ-11 Adapter, Preconfigured |
AP0008900 5 | BNC (Female) Breakout to 100 mm Wires |
AP0013400 | GNSS Antenna Cable Splitter, F-Type, 950-2150 MHz, One Port Pass DC |
AP0014900 6 | BNC (Female) Breakout to Screw Terminal |
AP0015000 7 | BNC (Male) Breakout to Screw Terminal |
AS0029900 | Operation Manual (1088) |
AS0033100 | Rack Slide Kit |
AS0044600 | Antenna Mounting Kit |
AS0044700 8 | 21 dB In-Line Pre-amplifier |
AS0048900 | Antenna Grounding Block Kit, RoHS |
AS0056600 | 24 Inch Rack Mount Kit |
AS0067200 4 | Programming Port Cable with adapter |
AS0094500 | GNSS Surge Arrester |
CA0019806 | RS-232 Null Modem Cable, DB9F-DB9F, 2 m (6 ft) length |
CA0021302 1 | 2 m (6 ft) RG-6 Antenna Cable, RoHS |
CA0021306 1 | 6 m (20 ft) RG-6 Antenna Cable, RoHS |
CA0021330 1 | 30 m (100 ft) RG-6 Antenna Cable, RoHS |
CA0021345 1 | 45 m (150 ft) RG-6 Antenna Cable, RoHS |
CA0021360 1 | 60 m (200 ft) RG-6 Antenna Cable, RoHS |
CA0021375 1 | 75 m (250 ft) RG-6 Antenna Cable, RoHS |
CA0022500 9 | Option 28 System Frequency Reference Cable, 6 m (20 ft) |
CA0023600 4 | RJ-11 Cable Four-Pin Crossed, 2 m (7 ft) |
CA0026000 10 | Power Cord IEC-320 to Bare Leads |
CN0010550 11 | 50-Pin Parallel BCD Mating Connector |
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 |
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 1 | 300 m (1000 ft) Roll RG-11 Cable, RoHS |
WC0005000 1 | 300 m (1000 ft) Roll RG-6 Cable, RoHS |
WC0005200 13 | 300 m (1000 ft) Roll RG-6 Plenum Rated Cable, RoHS |
1 Stocked length. Custom lengths available from 0.3 m (1 ft) to 300 m (1000 ft). Contact factory.
2 Only applies if standard power supply is ordered.
3 Converts female BNC-terminated coaxial cable to pair of wires.
4 Used with retired options: Option 32 or Option 33.
5 Converts male BNC-terminated coaxial cable to pair of wires.
6 Converts pair of wires to female BNC.
7 Converts pair of wires to male BNC.
8 Used for cable lengths greater than: RG-6 75 m (250 ft) ; RG-11 100 m (328 ft). For the Models 120x: Used for RG-6 cable lengths greater than 100 m (328 ft)
9 Used with Option 28.
10 Used with standard power supply.
11 Used with Option 04.
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 | |
---|---|
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
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) | |
---|---|
1088B_Firmware_02May2019 | Requires an EPROM update from Arbiter. |
NTP/PTP Firmware_2.08_update-00.11 | Downloadable. UNZIP, read instructions, and use the web/SSH interface to import apf file(s) into unit. |
NTP/PTP Firmware_SHA256_2.08_update-00.11 | NTP/PTP Firmware SHA256 checksum |
Power System Time, Frequency, and Phase Monitor Firmware_05Apr2012 | Requires an EPROM update from Arbiter. |
Firmware Version and Related Information
EPROM update (1088B_Firmware)
Version | Rev Level | Version Notes |
---|---|---|
02May2019 | Updates are not security related.
|
|
20Oct2016 | Updates are not security related.
|
|
30Nov2015 |
|
|
05Nov2015 |
|
|
01Jul2013 | Rerelease of 13Jun2013 firmware plagued by a compiler with the inane inability to determine what is an error. Option 34 update:
Option 28 update:
|
|
13Jun2013 | Option 34 and Option 35 updates:
Option 28 update:
|
|
03Aug2011 |
|
|
14Jun2011 |
|
|
26May2011 |
|
|
03Jan2011 |
|
|
03May2010 |
|
Downloadable Firmware (NTP/PTP Firmware)
The zip file contains all files and PDF instructions necessary to update the Network Time Protocol (NTP) / Precision Time Protocol (PTP) firmware. Reminder: Unzip the downloaded file to access the PDF instructions and individual update files.
Version | Rev Level | Version Notes |
---|---|---|
2.08_update-00.11 | Updates are not security related. Released 23May2018 1. Enhancement to allow proper recognition of the Model 1202B/C in Support > Version. Support > Update Log Support > Version Support > Update Log should have the following entries: opt34_tps_02.08_update 00.11 Compiled Tue May 22 17:18:40 PDT 2018 Reminder: Unzip the downloaded file to access the PDF instructions and individual apf update files. |
|
2.08_update-00.10 | Updates are not security related. Released 01Nov2017 1. Enhancement to allow an additional port in the future. Version tab does not change. Support > Version Support > Update Log should have the following entry: sparky-01.07 Compiled Wed Oct 25 06:52:40 PDT 2017 Reminder: Unzip the downloaded file to access the PDF instructions and individual apf update files. |
|
2.08_update-00.09 | Updates are not security related. Released 23May2017 1. Updates CLOI to 1.11. The new CLOI reduces the load on the option board CPU which allows it to serve more PTP clients. Support > Version Reminder: Unzip the downloaded file to access the PDF instructions and individual apf update files. |
|
2.08_update-00.08 | Updates are not security related. Released: 11Jan2017 1. Updates sys_monitor-01.05. The new sys_monitor corrects a bug in the frequency tuning algorithm that results in high system time offsets on some units. Whether or not a system is susceptible to this bug depends on the initial frequency of the on-board oscillator prior to tuning. It is likely that a system showing low offset now will continue to work. However, to be safe, the update is recommended. Support > Version Reminder: Unzip the downloaded file to access the PDF instructions and individual apf update files. |
|
2.08_update-00.07 | SECURITY UPDATE Released: 17Aug2016
|
NTP/PTP Firmware_SHA256
Version | Rev Level | Version Notes |
---|---|---|
2.08_update-00.11 |
EPROM Update (Power System Time, Frequency, and Phase Monitor Firmware)
Version | Rev Level | Version Notes |
---|---|---|
05Apr2012 |
|
|
13Jul2006 |
|
Establishing Traceability of Synchrophasors at the National Laboratory Level
Download cris2004_Establish_credibility_syncrophasor_measurements.pdf (68 kB) »
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 102: Synchronizing End-to End Relay Testing with Model 1088B
Download application_note_102.pdf (18 kB) »
App Note 103: Large Format Displays with Arbiter products
Download application_note_103.pdf (16 kB) »
COMTRADE Sample Rate Generator
Download ds_comt.pdf (27 kB) »
Continual Self Calibration with Power System Time, Frequency and Phase Monitor Option
Download power_system_time_freq_phase_monitor_continually_cal.pdf (34 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) »
Internal Network Time Protocol (NTP) Server -DISCONTINUED-
Download ntp.pdf (22 kB) »
Internal Network Time Protocol (NTP) Server Español -DISCONTINUED-
Download ntp_option32_espanol.pdf (129 kB) »
Option 32: Internal NTP Server Setup and Operation Guidelines -DISCONTINUED-
Download ntp_option32_english.pdf (279 kB) »
Option 33: Dual Internal NTP Server Setup and Operation Guidelines -DISCONTINUED-
Download ntp_option33_english.pdf (301 kB) »
Option 34: Network Time Protocol (NTP)/Precision Time Protocol (PTP) Server Data Sheet
Download Option34_NTP_PTP.pdf (22 kB) »
Power System Time, Frequency and Phase Monitor
Download power_system_time_freq_phase_monitor.pdf (152 kB) »
Self-Monitor, IRIG-B Distribution System and Second RS-232
Download self_monitor_irigb_distribution_system.pdf (20 kB) »
Windows® Time Service Configuration
Download w32time.pdf (14 kB) »
Arbiter Time Service Installation Instructions
Download pd0041300_ArbiterTimeServiceInstall.pdf (382 kB) »
Chassis Dimensions
Download chassis.pdf (4 MB) »
Timing Products Options and Accessories
Download timing_and_frequency_options.pdf (36 kB) »
Model 1088A/B Firmware Upgrade Instructions
Download 1088_DST_ROM_instructions.pdf (309 kB) »
Option 28 Firmware Upgrade Instructions
Download Option28_DST_ROM_instructions.pdf (154 B) »
GNSS Surge Protector Installation Instructions
Download pd0045800_surge_protector_installation_instructions.pdf (110 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) »