coreSync™ | OSA 3230B PRC and ePRC

Fully ITU-T compliant Cesium primary reference clock sources

Most relevant infrastructure demands a cesium primary reference clock (PRC) source that generates
highly stable and precise frequency signals. Our OSA 3230B PRC and ePRC cesium units, fully compliant
with the most stringent ITU-T recommendations, are the key for assured and precise synchronization,
even in absence of a GNSS signal.
Highly accurate synchronization has become vital not only for mobile network infrastructure but also for other fields such
as defense, metrology and space-related applications, as well as data centers and speed trading. Moreover, mission-critical
applications cannot rely on GNSS alone for the supply of accurate timing. GNSS threats, such as jamming and spoofing, are
growing. ePRTC solutions that include cesium enhanced PRC (ePRC) sources, provide the necessary immunity against GNSS
outages.

Our OSA 3230B PRC is a highly stable and accurate cesium clock that provides a frequency source with an accuracy better
than ±1x10-12, together with very high frequency stability. The OSA 3230B ePRC achieves this and more. It meets the much
more stringent enhanced PRC requirements, including maintaining sub-nanosecond time deviation (TDEV) for at least
10,000s. This enables the deployment of enhanced primary reference time clocks (ePRTCs) compliant with the stringent
ITU-T G.8272.1 recommendation. Our ePRTCs solve the GNSS dependency while providing higher performance levels than
standard PRTC systems.

oY ur benefits
Fully compliant with ITU-T G.811 PRC and Extended performance
G.811.1 ePRC

Standards compliant
Compact size

Unique flexibility Operational simplicity

High-level specifications

Cesium performance Sync input Outputs

y Two variants: PRC (ITU-T G.811) y 1PPS TTL (−3V) at 50 τ y Two direct frequency interfaces
and ePRC (ITU-T G.811.1) y BNC connector 1 x 5MHz and 1 x 10MHz
y Freq. accuracy: ±1 x 10-12 y One on rear side plus one on y One analog interface
y Reproducibility: ±1 x 10-12 front side for 19” version programmable from 0.1MHz to
y Adjustability: 50MHz sine
− Resolution < 1 x 10-15 y Three digital outputs: 1PPS,
− Range ±1 x 10-9 1.5MHz and 10MHz

Optional output expansion Management Mechanical

y Five additional outputs: y Control and monitoring via: y ETSI (4RU shelf) and 19” (3RU
− Four digital output interfaces − Three alarm contacts, shelf) variants
configurable to 2048MHz/E1/ − RS232 communication for y Dual feed 48VDC or mixed
T1/1PPS/10MHz local management with GUI 110-240VAC/48DC power supply
− One analogue output − Ensemble suite for remote y Power consumption: 50W at
interface configurable from management via external 25°C
0.1MHz to 50MHz sine TCP-IP device

Applications in your network

PRC and ePRC cesium clocks for highly precise synchronization of mission-critical infrastructure
y Precise synchronization of time-based communication networks such as radio access networks for mobile
communications, defense systems or metrology applications; also legacy networks such as SONET/SDH
y Deployment of ePRTC solutions that provide highly accurate and stable synchronization even without GNSS

GNSS GNSS

PTP timing
distribution network

O S A 5430 O S A 3230B
eP R C

Enhanced primary
reference time clock
G.811.1 MTIE and TDEV masks
G.8272.1 ePRTC

Our OSA 3230B is fully compliant with ITU-T G.811.1 MTIE and TDEV
All units are tested against G.811.1 TDEV and MTIE masks
The results are provided in the factory acceptance test documentation

For more information please visit us at www.adva.com

© 09 / 2021 ADVA Optical Networking. All rights reserved.

Product specifications are subject to change without notice or obligation.

 coreSync™ | OSA 3230B PRC and ePRC datasheet – technical information

Cesium performance Synchronization input

y Frequency Accuracy: ±1 x 10-12 y Type: 1PPS TTL (≥3V)
y Reproducibility: ±1 x 10-12 y Connector: BNC
y Adjustability: y Location: 1 on rear side plus 1 on front side for 19”
− Resolution < 1 x 10-15 version
− Range ±1 x 10-9
Power supply
Wander generation y Voltage: 48VDC nominal floating (24V to 60V)
OSA 3230B PRC y Power feeds: dual
y Conforming to ITU-T G.811 and GR-2830 - PRS y Power consumption: 50W at 25°C (max. 60W during
y 45 minutes warm-up time at 25°C warm-up)
y MTIE limit (µs) Observation interval τ (s) y Optional configuration: 1xAC plus 1xDC with OSA 3230B
0.275 × 10–3τ + 0.025 0.1 < τ ≤ 1,000 19” version (110-240VAC 50-60Hz)
10–5τ + 0.29 τ > 1,000 Management interface
y TDEV limit (ns) Observation interval τ (s) y Interface: RS232C on DB-9 for both local management
3 0.1 < τ ≤ 100 with CMSW GUI and remote management using
0.03τ 100 < τ ≤ 1000 Ensemble Suite management software with UMI interface
30 1000 < τ < 10000 module
OSA 3230B ePRC y Locations: 1 connector on rear side plus 1 connector on
y Conforming to ITU-T G.811.1 front side for 19” version
y 45 minutes warm-up time at 25°C y Alarms: 3 relay contacts
y MTIE limit (µs) Observation interval τ (s) y LED Monitoring: 3 LEDs for monitoring power supply
0.004 0.1 < τ ≤ 1 status, operation and alarms
0.11114 × 10−3τ + 0.00389 1 < τ ≤ 100 y LED Location: 3 LEDs on front side plus 3 LEDs on rear
0.0375 × 10−6τ + 0.015 100 < τ ≤ 1000 side for 19” version
10-6τ + 0.0140375 τ > 1000 Mechanical
y TDEV limit (ns) Observation interval τ (s) y ETSI: 436mm x 176mm (4RU) x 240mm (W x H x D) with
1 0.1 < τ ≤ 10000 front access connectors, adapter for 19” rack standard
Outputs y 19”: 436mm x 132mm (3RU) x 400mm (W x H x D) with
y Direct frequency output rear access connectors, adapter for 23” rack standard
− Interfaces: 2 y Weight < 15kg (excluding packaging)
− Frequency: 1 x 5MHz + 1 x 10MHz Telecom signal expansion (optional)
− Level and connector: 13dBm at 50Ω (BNC) y Digital Output
y Analog output − Interfaces: 4
− Interfaces: 1 − Frequency: configurable to 2.048MHz / E1 / T1 / 1PPS /
− Frequency: programmable from 0.1 to 50MHz sine 10MHz
− Shape: wave output at 50Ω (BNC) − Level: according to G.703
− Level: − Connector: BNC 75Ω or DB9 120Ω (T1:DB-9 100Ω)
− 500mVrms (typical) y Analog Output
− 250mVrms (minimal) − Interfaces: 1
y Digital output − Frequency: configurable from 0.1 to 50MHz
− Interfaces: 3 − Format: Sine wave output
− Frequency: 1PPS / 1, 5 and 10MHz − Connector: BNC 50Ω
− Level: ≥ 3V at 50Ω − Level: 500mVrms (typical) / 250mVrms (minimal)
− Shape: square
− Connector: BNC

Product specifications are subject to change without notice or obligation.

© 09 / 2021 ADVA Optical Networking. All rights reserved. Page 3 of 4

 coreSync™ | OSA 3230B PRC and ePRC datasheet – technical information

Environmental OSA 3230B ePRC for enhanced PRTC solutions

y Operating conditions: y The OSA ePRTC solution (figure 1) comprises two
− EN 300 019-1-3, class 3.2. OSA devices: an OSA 3230B ePRC cesium clock that is
− Extended range from –5°C to +55°C connected to an OSA 5430 grandmaster with a single
y Transportation: EN 300 019-1-2, class 2.2 clock module
y Storage: EN 300 019-1-1, class 1.1
GNSS
y Humidity: Up to 95%
y Altitude (operating): 0 to 15,000m
y DC magnetic field: ±2 Gauss (maximum) OSA 5430

y Safety: EN 60950-1:2005 10MHz

BITS
10MHz

y EMC emission:
Sync-E
PPS/PPS+ToD
PTP
NTP

− EN 55032: 2012, 2015 PPS / CLK

− EN 61000-6-2: 2005
GNSS Clock
− EN 61326-1: 2013 receiver combiner

y EMC immunity: Time, phase, frequency

OSA 3230B eP RC
Enhanced primary
outputs
− EN 55024: 2010
Reference time clock

− EN 61000-6-2: 2005 1

− EN 61326-1: 2013 Fig. 1 Unprotected ePRTC

y CE certified (OSA 5430 with single clock module + OSA 3230B ePRC Cesium)
y UL certified by NRTL laboratory
y Fully RoHS compliant y The fully protected OSA ePRTC solution (figure 2)
comprises two OSA 3230B ePRC cesium clocks connected
to an OSA 5430 grandmaster with dual clock modules
GNSS

OSA 5430
10MHz
BITS
10MHz
Sync-E
PPS/PPS+ToD
PTP
NTP

GNSS Clock
receiver combiner PPS / CLK
GNSS Clock
receiver combiner

Time,
Time, phase,
phase, frequency
frequency
outputs
outputs
OSA 3230B eP RC OSA 3230B eP RC

Enhanced primary
reference time clock

Fig. 2 Protected ePRTC

(OSA 5430 with dual clock modules + two OSA 3230B ePRC Cesium)

Product specifications are subject to change without notice or obligation.

© 09 / 2021 ADVA Optical Networking. All rights reserved. Page 4 of 4