GPS/GLONASS primary reference source VCH-311C contains multi-channel GPS/GLONASS receiver, time scale comparison unit and automatically adjustable Rubidium reference oscillator.
The instrument is intended to be used as the first class SDH synchronization equipment of digital networks telecommunication.
Key applications
Digital SDH networks clock synchronization.
Specifications
Output signals:
– 5 and 10 MHz, sine, 1 V into 5 Ω load;
– 2.048 MHz, pulse, (ITU-T G.703/13). Optionally: 2048 kbps, pulse, (ITU-T G.703/9);
– 1 Hz, pulse, TTL levels into 50 Ω load, (1 pps GPS/GLONASS receiver output).
The noise generation of a PRS VCH-311 meets to ITU-T G.811 section 6 and ЕТС 300 462-6 section 5:
Wander:
MTIE:
0.275 × 10
–3
τ + 0.025 μs for 0.1 < τ ≤ 1000 s
10
–5
τ + 0.29 μs for τ > 1000 s
TDEV:
3 ns for 0.1 ≤ τ < 100 s
0.03 τ ns for 100 ≤ τ < 1000 s
30 ns for 1000 ≤ τ< 10 000 s
Jitter: do not exceed 0.05 UIpp.
Digital control and monitoring
all operating parameters on LSD display.
Interface:
RS-232C; USB. Optionally: NTP-server (Stratum 1); SiRF time protocol.
Power supply:
AC (198÷242) V, (50÷60) Hz; DC (38.4÷57.6) V, two inputs (specity in purchase order).
Power consumption:
45 W in normal conditions (85 W warm up time 1 hour).
Dimensions (W×H×D):
483×133×310 mm.
Antenna:
dimensions 185mm×∅181mm. Weight 0.5 kg. Antenna cable’s lenght is 60 m.
Weight:
10 kg.
Warranty:
3 years.
Life time:
15 years.
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