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Timing and frequency reference generators locked to GPS


OTGPS1U is a time and frequency reference generator (10 MHz and 1 PPS) in a compact 1U Rack form factor.

OTGPS1 has been designed to bring the maximum level of flexibility and reliability to the end-user broadcaster, featuring 2 redundant and hot swappable power supply units, 2 redundant and high precision GPS / GLONASS receivers with batteries (up to 30 minutes of optimal functioning if power supply temporarily fails), and clever switch logic processing.

OTGPS1U brings fast GPS or GLONASS locking and very high precision and stability specifications, and allows broadcasters to save space and additional units by providing up to 18 independent output couplets (10 MHz and 1 PPS).

Main features:

  • Compact 1U 19” Rack chassis
  • Double redundant GPS / GLONASS receiver modules with fast signal acquisition, and back-up batteries
  • Extended hold over with proprietary algorithms
  • 18 separate 10 MHz outputs, and 18 separate 1 PPS outputs
  • Hot swappable and redundant power supply units (AC+AC, AC+DC, or DC+DC)
  • Web interface and SNMP management
  • Remote control and GPIO

Frequency Reference

Output signals:
10 MHz sine wave
Output level:
+8 dBm, ±2 dB
Number of outputs:
18 independent
Output impedance:
50 Ohm
Output connectors:
Noise figure 100 Hz:
-140 dBc/Hz, typical
Noise figure 10 kHz:
-150 dBc/Hz, typical
1e-12 daily average with disciplined OCXO
Initialization time:
< 4 minutes

Time Reference

Output signals:
1PPS, 5Vp.p. TTL, 100μs
Number of outputs:
18 independent
Output impedance:
50 Ohm
Output connectors:
BNC (f)
PPS accuracy:
< 50 nsec
Holdover stability:
± 5 μsec after 5 hours of GPS / GLONASS signal absence (optional 1 μs after 24 hours)

GPS / GLONASS Characteristics

L1 1575,42 MHz (GPS) or L1 1602,00 MHz band (GLONASS)
Correlation on 50 channels
Antenna connectors:
N (f), 50 Ohm
First fix time:
< 32 sec. with satellite signals > -130 dBm


2° GPS module:
Yes (Optional)
2° Power supply module:
Yes (Optional)
Commutation Function:


Network Single Phase 90÷240 V∼ 50/60 Hz, IEC320 C14 Plug
18 – 75 Vdc rear connector Phoenix contact
Backup battery
3,7V 1020 mA (maintains functioning the GPS/GLONASS modules in case of absence of power supply for approx 30 minutes, avoiding the restart of the disciplining procedure due to short power supply interruptions)


Operating temperature range:
-5°C ÷ 40°C
Max. relative humidity:
90%, non condensing
Max. operating altitude:
2500 m. a.s.l. (>2500 m. optional)


19” 1U Rack
482 mm
44 mm
300 mm without connector


RS-232 on Connector DB15 (f)
SNMP on Ethernet 10/100
Web based GUI Ethernet 10/100
2 relay contacts NO,NC,COM
2 coupled photo inputs

Specifications are subject to change without notice.

Reference generator locked to GPS / GLONASS signal, 18 x 10 MHz out + 18 x 1 PPS out


Redundant GPS / GLONASS receiver plug-in board with auto change-over
Opt. G2
Redundant power supply, hot-swappable unit
Opt. A
DC IN option
Opt. V
26 dB LNA GPS / GLONASS antenna including mounting kit and 25 mt. coaxial cable
Opt. KA

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