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iSource+TM Low Cost LPFRS Spec
th
6 November 2014
Low Cost & Profile Frequency Rubidium Standard (LPFRS)
High Precision & Performance Source
Telecom | Navigation | Broadcast | Defense | Instrument
Applications
[email protected] Switzerland Headquarter North America Sales Offices
www.spectratime.com +41.32.732.16.66 +1.512.470.3980
Specifications are subject to change without prior notice An Orolia Group Business
iSource+TM Low Cost LPFRS Spec
Product Characteristics:
Small volume : 13 in3.
Frequency offset over temp. range : 110-10
Stability : 110-12 / 100 sec.
Long term stability : < 510-10 / year
Low warm-up current : < 0.9A
Main Features: Main Applications:
Very low temperature sensitivity Synchronisation telecommunications
Excellent short term stability (SDH, SONET, SS7, GSM, TETRA)
Low power consumption Digital Audio Broadcast
Fast warm-up TV transmissions (analog & digital)
Small volume / low profile Military communications
Rb lamp extended life expectancy Navigation
(20 years) Instrumentation
Industry standard pin out Tracking and guidance control
RS 232 interface for centre frequency
adjustment and monitoring of the
working parameters
Parameters accessible through RS232:
The working and monitoring parameters of the HH: DC-Voltage of the photocell (5V to 0V)
LPFRS are accessible for read and write GG: peak voltage of Rb-signal (0 to 5V)
operations through the serial RS-232 port FF: not used
(1200 bits/sec., no parity, 1 start bit, 8 data EE: varactor control voltage (0 to 5V)
bits, DD: Read-back of the user provided
1 stop bit). frequency adjustment voltage on pin 2 (0
There are three different commands, which to 5V)
are: CC: Rb-lamp heating current (500mA to 0mA)
M, Cxx and Fxx followed by a carriage return. BB: Rb-cell heating current (500mA to 0mA)
AA: 90MHz power control signal (0 to 5V)
M: monitors the basic factory adjustments of
the atomic clock. Cxx: output frequency correction through the
The returned answer looks like synthesizer, by steps of 1 x 10-9 , where
xx is a signed 8 bits word. This value is
HH GG FF EE DD CC BB AA automatically stored in a EEPROM.
Where each returned byte is an ASCII Fxx: output frequency correction through C-
coded hexadecimal value, separated by a field, by steps of 1 x 10-11 , where xx is a
character. All parameters are coded signed 8 bits word.
at full scale.
[email protected] Switzerland Headquarter North America Sales Offices Page 2 of 5
www.spectratime.com +41.32.732.16.66 +1.512.470.3980
An Orolia Group Business
iSource+TM Low Cost LPFRS Spec
Package: (all dimensions in inch)
Connector front view:
PIN FUNCTION
1 +24V (+12V)
2 0V (GND)
3 Lock indicator (open coll.)
4 Vref (5V hi-stability ref.)
5 GND
6 TxD (RS232 transmit,TTL)
7 GND
8 Frequency adjust (0 to 5V)
9 RxD (RS232 receive,TTL)
[email protected] Switzerland Headquarter North America Sales Offices Page 3 of 5
www.spectratime.com +41.32.732.16.66 +1.512.470.3980
An Orolia Group Business
iSource+TM Low Cost LPFRS Spec
SPECIFICATIONS
ELECTRICAL:
Type LPFRS-01
Standard version Options
Frequency 10 MHz Optional 20 MHz, 5 MHz
<= 1 x 10
-10
Frequency change within operating -0 to 65