| Products > Master_Clocks
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Master Clocks
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A master clock can be known as a reference clock, time standard, network clock, authoritative time source, sync clock, or atomic clock.
But the function is the same: to keep timing systems and secondary clocks (slave clocks) running consistently to improve performance. A Spectracom master clock offers the additional advantage of accuracy and traceability to national and international standards by using GPS and other atomic time sources. NetClock® and Epsilon Clock™ master clocks have been optimized for the specific requirements of many applications and industries including vital communications and command centers, such as 9-1-1 and other public safety answering points (PSAP), aerospace and defense, and telecommunications and broadcasting.
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| Master Clock Comparison Chart |
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Time & Frequency Server |
Network Time Server |
Compact GPS Clock |
GPS Clock |
GPS Clock |
GPS Clock |
Redundant GPS Clock |
| Model |
9383 |
9389 |
EC1S |
EC2S |
EC20S |
EC31M |
EC22S |
| Timing Reference |
GPS, IRIG-B, Modem, 1PPS, NTP, (optional SAASM GPS) |
GPS, E1, 10 MHz |
GPS, 1PPS |
GPS, 1PPS, NMEA |
GPS, 1PPS NMEA, IRIG-B |
GPS, 1PPS, NMEA |
| Internal Oscillator |
TCXO (optional OCXO, Rb) |
OCXO |
OCXO (optional Rb) |
OCXO |
| Outputs |
NTP, ASCII time code, alarm, timer, IRIG-B/E, 1PPS, 10 MHz |
NTP, ASCII time code, alarm, timer |
10 MHz, 1PPS, NMEA |
(4x) 10 MHz, 1PPS, ASCII time code |
NTP, (7x) 10 MHz, (7x) 1PPS, NMEA, alarm |
(2x) NTP, (2x) 1PPS, (2x) 10 MHz, IRIG-B, NMEA |
NTP, 8x 10 MHz, 8x 1PPS, NMEA |
| Optional outputs |
contact factory |
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Additional 1PPS, E1, STANAG, HaveQuick, IRIG-B, other frequencies |
Additional (3x) 10 MHz, (3x) 1PPS |
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| Front panel display |
2 |
2 optional |
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Y |
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Y |
| Network management |
Y |
Y |
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Y |
Y |
Y |
| Features |
Network & security features |
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Front panel interface with EC3S version |
Optimized for digital broadcast signals & BTS |
Time-stamping 4 external inputs |
2 redundant hot-swapable clock modules |
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NetClock Master Clock Model Descriptions:
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NetClock® Model 9383 GPS Master Clock
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- Stratum-1 GPS primary time source
- 10/100 Base-T LAN port
- Time codes via two RS-232 serial ports, two RS-485 data bus ports
- IRIG B/E AM/TTL
- 1 PPS and 10 MHz
- Optional Rubidium or OXCO oscillator back-up for GPS
- Optional modem as back-up or primary
- Meets NENA master clock standard
- RoHS/UL compliant
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NetClock® Model 9389 GPS Master Clock
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- Stratum-1 GPS primary time source
- 10/100 Base-T LAN port
- Time codes via RS-232 serial port and RS-485 data bus port
- Optional front panel displays
- Optional modem as back-up or primary
- RoHS and UL compliant
- Ideal for synchronizing computer networks
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FAA-Approved Time-Of-Year Clock Model 8183A
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- GPS clock synchronizes FAA IRIG-B systems and computer networks
- RS-232 FAA IRIG B time code output port providing four separate outputs
- Replaces GOES TOY clock
- Front panel Time of Year (TOY) selectable clock display
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Epsilon Clock Model Descriptions:
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Epsilon Clock™ Model EC1S GPS Clock
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- Compact GPS clock module
- 10 MHz, 1PPS, time of day output
- Choice of 3 OCXO oscillator options
- RoHS compliant
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Epsilon Clock™ Model EC2S GPS Clock
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- 19" rack mount (1RU high)
- 1PPS (up to x4), 10 MHz (4x)
- Optional outputs: 1 MHz, 5 MHz, frequency synthesizer, 2048 KHz, 2048 Kbit/s, IRIG-B, STANAG 4430 (Havequick)
- 2 OCXO and Rubidium oscillator options
- RoHS compliant
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Epsilon Clock™ Model EC20S GPS Clock
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- 19" rack mount (1RU high)
- 1PPS (up to x10), 10 MHz (up to 10x)
- Remote management by SNMP/HTTP
- OCXO and Rubidium oscillator options
- RoHS compliant
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Epsilon Clock™ Model EC3S GPS Clock
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- 19" rack mount (2RU high)
- 1PPS, 10 MHz (4x)
- Optional outputs: 1 MHz, 5 MHz, frequency synthesizer, 2048 KHz, 2048 Kbit/s, IRIG-B, STANAG 4430 (Havequick)
- Rubidium oscillator
- User interface by keypad and front panel display
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Epsilon Clock™ Model EC22S Redundant GPS Clock
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- Dual hot-swapable GPS clock modules
- Stratum-1 NTP time server
- Up to 8 x 1 PPS TTL outputs
- Up to 8 x 10 MHz outputs
- Remote management by SNMP/HTTP
- Choice of 3 OCXO oscillator options
- RoHS Compliant
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Epsilon Clock™ Model EC31M Stand-Alone Master Clock
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- Dual outputs: 1PPS/10 MHz
- Dual isolated LAN ports for NTP server and/or management
- IRIG-B ouput
- time-stamping of external events (4x)
- User-selectable, prioritized references: GPS, NMEA/1PPS, IRIG-B
- OCXO or Rb oscillator
- RoHS Compliant
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