MODEL COMPARISON CHART
| Model |
SR7110 |
SR9210 |
SR9750 |
SR9860D |
| Network |
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| LAN 10/100 Mbit BaseT , RJ45 auto-sensing |
Single |
Single |
Single |
Dual LAN |
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| Timing Protocols |
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| NTP v2, v3, v4, SNTP v3, v4 |
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| NTP Peering |
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| NTP Broadcast |
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| NTP MD5 Authentication |
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|
|
| NTP Requests / Second (typical) |
> 200 |
> 1000 |
> 1000 |
> 5000 |
| Maximum Number of NTP Clients (typical) |
>12,000 |
> 64,000 |
> 64,000 |
> 320,000 |
| NMEA RS232 Output |
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| Time Reference Options |
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| 12 Channel GPS Receiver High Sensitivity Indoor, Over- Determined Clock, Single Satellite Operation |
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| LF - MSF (UK) Reference Clock |
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| LF - DCF-77 (German) Reference Clock |
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| Dual GPS and LF Radio Reference Clocks |
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| Monitoring and Reporting |
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| SNMP v1 / v2c Trap Alarms (Can be disabled) |
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| System Logging (SysLog) |
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| Remote System Logging (Remote Syslog) |
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| GPS Satellites in View & Signal to Noise Ratio (SNR) |
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| Configuration Protocols |
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| HTTP (Web) / HTTPS (SSL Secure Sockets Layer) |
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| SSH (Secure Shell), SCP (Secure Copy Protocol) |
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| TELNET, FTP |
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| Console (RS232) |
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| DHCP |
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| Oscillator Options |
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| Standard Crystal Oscillator |
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|
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| High Stability GPS\LF Disciplined TCXO Oscillator |
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| |
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| Timing (Typical) |
|
|
|
|
| GPS Accuracy |
1 msec |
60 nsec |
60 nsec |
60 nsec |
| LF Accuracy |
10-50 msec |
1-20 msec |
1-20 msec |
1-20 msec |
| NTP Accuracy (typical, GPS Synchronised) |
<10 msec |
< 250 usec |
< 250 usec |
< 1 usec |
| 24 Hour Holdover (GPS disciplined, typical @ 25C) |
- |
- |
<±10 msec (2.3e10-7) |
<±4.3msec (1e10-7) |
| Buffered 1 PPS Output on BNC |
|
Option |
Option |
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MECHANICAL \ ENVIRONMENTAL SPECIFICATION
| Dimensions |
483 x 205 x 44 mm (19.0" x 8.05" x 1.73") |
| Construction |
1U High 19" Rack mount, 1.8mm Aluminium |
| Weight |
approx 2.2Kg (4.84lbs) |
| Power Supply |
Universal 100-250 VAC 50- Hz CE/UL/CSA Approved PSU
(Optional 9-36V DC IN and 85-250V DC IN versions available) |
| Power Consumption |
approx 5W |
| Operating Temperature |
0C ~ +50C (Extended temperature range options available) |
| Storage Temperature |
-10C ~ +60C (Extended temperature range options available) |
| Relative Humidity |
95% non-condensing |
| Approvals |
CE, EN61000-6-1, EN61000-6-3, FCC |
INPUT \ OUTPUT SPECIFICATION
| LAN |
10/100 Mbit BaseT , RJ45 auto-sensing |
| Serial Console |
9 way ‘D’ RS232, 9600, N, 8, 1 |
| GPS Input |
TNC female |
| LF/AUX Input: |
9 way ‘D’ |
| Power |
Double Fused IEC Inlet |
| PPS (optional) |
Buffered pulse per second output on BNC (optional) |
INTEGRAL GPS RECEIVER SPECIFICATION
| Type |
True GPS Timing Receiver, 12 Channel, L1 1575.42 MHz |
| Features |
High sensitivity, Over-determined clock modes, Single satellite in view |
| Timing |
GPS Time Traceable to UTC (USNO) |
| Accuracy |
+/- 60 nsec UTC (typical) |
| Acquisition (Cold Start) |
38 sec |
More on TimeTools SC range of compact NTP Servers
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