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
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 |
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| Functions |
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| Status LEDs |
|
| Keyboard | Eight keys; select display functions or setup menus |
| Setup |
|
System
| RS-232 | 1200 baud to 230,400 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity
COM1: COM2: AUX OUT can provide programmable pulse function at RS-232 levels |
| Broadcast modes |
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| 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 |
| 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
