Model 1201B/C GNSS Synchronized Clock (100ns)

Model 1201B/C delivers better than 100 ns accuracy and includes the most highly sought after features in a precision time clock as standard plus many enhancements.

Three terminal strip outputs are jumper selectable to unmodulated IRIG-B, modulated IRIG-B, 1 PPS, programmable pulse, or event input. The 1201 is capable of driving multiple loads in parallel.

Like other Arbiter clock models, various options are available to add features such as NTP/PTP (Network Time Protocol/Precision Time Protocol [IEEE 1588]) support, four additional configurable outputs, high drive IRIG-B outputs, power system time, frequency, and Phase Monitor functions, one Form C (SPDT) fail-safe, LOCKED relay that is compatible with 129 Vdc digital fault recorder inputs; plus many more.

Model 1201B/C is available with two front panel configurations (see photos and Key Features tab). Each product includes the GNSS antenna and cable, a terminal power strip, and a rack mount kit, all backed by a Five Year Limited Warranty to the original owner/purchaser.

Produktinformation

Produkt Specifikation

Receiver Characteristics

Timing Accuracy

Accuracy Note Specifications apply at the 1 PPS/IRIG_B unmodulated/PP outputs when receiving four or more satellites, as of date of publication.
Accuracy UTC/USNO ± 100 ns peak

Position Accuracy

2 meters, rms

Satellite Tracking

Seventy-two (72) channel receiver: L1 GPS/SBAS C/A, L1 GLONASS CT, Galileo, and BeiDou.

Acquisition

  • 40 seconds typical, cold start
  • 25 seconds, typical, warm start
  • 3 seconds, typical, hot start

Oscillator

Stability Standard: OCXO, 1 ms/day
Optional: OCXO, 10 µs/day

I/O Configuration

Output Connectors

Three standard pluggable terminal strip connectors with jumper-selectable signals:
Port 1: IRIG-B unmodulated, 1 PPS, Programmable Pulse or Event Input
Port 2: IRIG-B modulated, 1 PPS, IRIG-B unmodulated, Programmable Pulse or Event Input
Port 3: IRIG-B unmodulated, 1 PPS, Programmable Pulse or Event Input

Output characteristics:

  • 5 V CMOS bus drivers with 10 ohms source impedance and ± 75 mA drive capability.
  • 4 Vpp, 20 ohms source impedance (IRIG- B modulated only)
  • 400 V, 220 mA, 1 W power dissipation open-drain FET drivers

Output Signals

One IRIG-B channel that controls both the unmodulated and modulated outputs. Configurable to Local or UTC time with C37.118.1 on or off, settings independent from Programmable Pulse IRIG-B output.

Event Inputs

One event timer channel with 100 ns resolution is standard. This function may be driven by the start bit of a received character on the serial port, or an external 5 V CMOS/TTL signal at one of the terminal strip connectors (jumper-selectable).

Programmable Pulse Output

One programmable pulse output (by a jumper connection) that may be output on a terminal strip connector or the AUX OUT pin on either COM port.
Six modes:

  • IRIG-B unmodulated (UTC/Local, C37.118.1 On/Off. Settings are independent from main IRIG-B signal.)
  • Every 1 second to 60,000 seconds, starts top of the second
  • Hourly at a specified offset
  • Daily at a specified time of day
  • One shot at a specified time of year
  • Slow Code (UTC/LCL)

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.

Relay Contacts

One Form C (SPDT) fail-safe, 0.3 A at 130 Vdc; configurable to Out-of-Lock, Fault, Alarm, Stabilized, or Programmable Pulse

Interface

Operator

Display
  • 2 character x 20 character supertwist LCD with white LED backlight
  • Status LEDs
  • 20 mm (0.8 in) LED; 6 digits (Model 1201C)
Functions
  • Time and date
  • Antenna status and position
  • Timing status
  • System status
Status LEDs
  • Normal (green)
  • Learn (orange)
  • Unlocked (red)
  • Alarm (red)
  • Operate (green)
  • Power A (green)
  • Power B (green)
  • Fault (red)
Keyboard Eight keys; select display functions or setup menus
Setup
  • COM 1 (RS-232 port 1)
  • COM 2 (RS-232 port 2)
  • Local Time Offset
  • Out-of-Lock Time
  • Relay Configuration
  • Backlight control
  • Event/Deviation
  • Programmable Pulse
  • System Delays
  • IRIG Time Data
  • Option Configuration

System

RS-232 1200 baud to 230,400 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity

COM1:
RS-232 (TXD, RXD, AUX IN, AUX OUT)
RS-422/485 (TXD+, TXD-)

COM2:
RS-232 (TXD, RXD, AUX OUT)

AUX OUT can provide programmable pulse function at RS-232 levels

Broadcast modes
  • Standard ASCII (IRIG-J)
  • Extended ASCII
  • ASCII with Time Quality
  • ASCII with Time Quality and Year
  • Vorne large-display
  • Status/Alarm
  • Event data
  • User configurable serial time code
Connector Male 9-pin D-subminiature

Power Requirements

Accommodates any combination of the two available power supplies in a single or redundant configuration. Choices include an universal supply or a low dc supply, both with surge withstand capability.

Standard

Voltage Universal
85 Vac to 264 Vac, 47 Hz to 440 Hz, 20 VA maximum or 100 Vdc to 350 Vdc, 30 W maximum.

Low DC
22 Vdc to 67 Vdc; 30 W maximum.

Inlet Secure Pluggable Terminal Strip

General

Physical

Size 425 mm x 280 mm x 44 mm (16.75 in x 11 in x 1.75 in)
19 in, 1 Rack Unit; 280 mm deep FMS.
Rack mounts and feet for tabletop included
508 mm x 381 mm x 203 mm (20 in x 15 in x 8 in), shipping
Weight 2 kg (4.5 lbs), net
5.5 kg (12 lbs), shipping
Antenna Cable Connection: F-type
Size: 80 mm dia. x 84 mm (3.2 in x 3.3 in)
Weight: 170 g (6 oz)
Temperature: – 55 °C to + 65 °C
Ground Block: Antenna protective ground. Copper, with M5 (10-32) stud and nut. Connects internally to gas discharge tube (GDT) lightning surge suppressor.
Antenna Cable Type: RG-6, 15 m (50 ft) provided
Weight: 0.69 kg (1.52 lbs) per 15 m
Antenna Mounting 0.75 in pipe (1 in – 14 marine) thread

Environmental

Temperature Operating: – 40 °C to + 65 °C
Nonoperating: – 40 °C to + 75 °C
Humidity Noncondensing
EMC 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 61000-4

Certificates and Approvals

CE mark/label and certificate

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