Frequency
Standard FN-OCXO
The Frequency Standard FN77-OCXO provides a 10 MHz
standard frequency signal (sine wave and TTL-outputs) with excellent technical specifications. The internal precision
quartz-crystal oscillator (OCXO) with high spectral purity is controlled and synchronized to
the transmitted reference signal DCF 77 of the German National Calibration Institute PTB
(Physikalisch-Technische-Bundesanstalt). All variations of the internal quartz-crystal
oscillator from the received reference signal are compensated continuously. The incoming RF signal level, the ageing process and stability of the
quartz-crystal oscillator are displayed at analogue meters. Two LED's are giving an indication
about the qualitity of the received RF signal level and status of the frequency control. Time
constants of 15 minutes or 2 hours can be selected.
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Frequency Standard FN-GPS and
Rubidium-Frequency Standard FN-GPS/R
The Frequency Standards FN-GPS (OCXO) and FN-GPS/R (Rubidium) provide a 10 MHz standard
frequency and 2.048 MHz clock output (as option) with high spectral purity. The accuracy and stability
of the output frequencies are controlled by the timing signals of the GPS satellite system.
The internal oscillator frequency is continuously monitored and corrected by the timing
signals of the GPS satellite system. The specified frequency accuracy is guaranteed
anytime - even under worst case conditions - by using best possible time constants. Any
other output frequencies than 10 MHz are generated by direct digital synthesis (DDS).
The world-wide availability of GPS signals and the external battery operation allows the
application at any in-house or field locations. The weather-proof GPS antenna can be
mounted quickly and easily. The supplied antenna cable (15 m) can be extended by another
50 m cable without affecting the instrument's function. An antenna amplifier is required for a
cable length more than 65 m.
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Frequency Standard
FNX-GPS
The SG 1000 series of synthesized signal generators cover a wide range of carrier
frequencies from 9 kHz to 1000 MHz with excellent spectral purity and comprehensive
modulation facilities. Two different models of the SG 1000 series are available, an
economical version with a switching time of 1 ms (BN 86204.000) between any frequencies and a high performance version with 1 µs / 15 µs
(BN 86204.001) high-speed
switching. Frequency changes less than 1 MHz are phase-continuous. The operation of SG 1000 is very simple by a softkey menu selection of modes. All
instrument settings and signal parameters can be entered by numeric keyboard, rotary
control knob and increment-decrement keys. The step size may be varied by the user in a
wide range. A backlight LCD display presents all measurement setup menus.
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Phase Standard
PN-GPS for ripple control
Basically the Phase Standard PN-GPS is a Frequency Standard with some additional
features. The PN-GPS generates master pilots for audio frequency ripple controlled
systems - for example power utility companies. The master pilot must be in mutually
phase-locked position to the central base station at any decentralized network elements.
The required master pilot - an audio signal - is generated from the GPS disciplined
OCXO. Time and frequency, referenced to the worldwide UTC standard, is made available free of
charge through the use of the GPS satellite system. At any locations in the world
synchronization signals can be generated decentrally by the GPS time signals which are in
mutually phase-locked position. The required master pilot is generated from the oscillator
frequency phase-locked to the GPS time signals by using DDS technique (Direct Digital
Synthesis).
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