Condition: Used

This Viavi C5TEM-R Rubidium Oscillator Timing Expansion Module (model C5TEM-R) is in used condition. TPlease note that the module requires a compatible mainframe such as the T-BERD/MTS-5800 V2 to operate.

What's included:
• Viavi C5TEM-R Rubidium Oscillator Timing Expansion Module
• Taoglas Magma AA.171 GPS/GLONASS/BeiDou active patch antenna with SMA cable (IP67 certified)
• Short SMA-to-SMA RF jumper cable (RG316 type)
• SMA female barrel adapter/coupler

The Viavi C5TEM-R is the Timing Expansion Module (TEM) for the T-BERD/MTS-5800 handheld network tester family, designed for field timing and synchronisation measurements. It delivers industry-leading accuracy for portable test applications by combining a GNSS receiver with a Rubidium-based miniature atomic clock (MAC).

The TEM module's dedicated rubidium oscillator tunes to a specified synchronisation source — such as a GNSS satellite, external 1 PPS, or 10 MHz reference clock — and can then operate in holdover mode, maintaining nanosecond-level accuracy even when satellite signals are unavailable.

Key capabilities with the T-BERD/MTS-5800 and C5TEM-R:
- Perform one-way delay measurements to identify asymmetric network delays
- Precisely measure PTP one-way delay, constant time error (cTE), and dynamic time error (dTE) using wander analysis with ITU masks and max |TE|
- Measure Floor Packet Percentile (FPP) of Sync PDV packets to validate PTP PDV limits for frequency recovery
- Qualify GNSS antenna installations by evaluating satellite signal strength and 360° sky plot viewing (instantaneous or over 24 hours)
- Troubleshoot 1 PPS output signal accuracy with 1 PPS wander analysis
- Measure T1 and E1 jitter and wander
- Measure PTP frequency accuracy using Floor Packet Percentile (FPP) analysis
- Conduct field PTP Time Error measurements to confirm stability and accuracy of PTP Boundary Clocks

RF Connectors / Ports:
GNSS Antenna Input: SMA female
1 PPS IN 1: SMA female
1 PPS IN 2: SMA female
1 PPS OUT: SMA female
10 MHz OUT: SMA female
10 MHz REF IN: SMA female

Oscillator Type: Rubidium-based miniature atomic clock (MAC)
GNSS Channels: 72-channel GNSS receiver
GNSS Constellations Supported: GPS, GLONASS, BeiDou, Galileo, SBAS, QZSS
Synchronisation Sources: GNSS, external 1 PPS, external 10 MHz, BITS/SETS
Host Interface: High-density edge connector (for direct attachment to T-BERD/MTS-5800)
Form Factor: Modular (attaches to T-BERD/MTS-5800 mainframe)
Designed in USA, Assembled in China
Part Number: C5TEM-R

Compatible Mainframes: T-BERD/MTS-5800, T-BERD/MTS-5800 V2, T-BERD/MTS-5882, T-BERD/MTS-5800-100G

Available Software Options:
1 PPS and 10 MHz Timing and Clock Analysis: C5TIMING
IEEE 1588v2 (PTP) 10/100/1000M and 1GE Optical: C5LS1588
1GE Optical Ethernet Wander: C5LSETHWANDER
1GE Optical SyncE: C5LSSYNCE
10GE Optical SyncE: C510GESYNCE
10GE Optical IEEE 1588v2 PTP: C510G1588
One-Way Delay 10/100/1000M and 1/10GE: C5OWD
PDH (DS1, DS3 etc.) Rx and Tx Electrical Wander: C5PDHWND

VIAVI TEM Timing Module data sheet — product overview, ordering information and key capabilities: Download PDF

T-BERD/MTS-5800 Timing Expansion Module (TEM) user manual — full operating instructions and specifications: Download PDF

VIAVI C5TEM-R TEM data sheet — field timing and synchronisation measurement module overview: Download PDF