Viavi T-BERD/MTS 5800 User manual

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T-BERD/MTS 5800 Portable Network Tester
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https://www.viavisolutions.com/en-us/products/timing-expansion-module-v2-tem-v2
T-BERD/MTS 5800 Portable Network Tester
Enabling the Timing Expansion Module
This quick card outlines how to set up a Timing Expansion Module on the OneAdvisor 800
and complete a survey to verify GNSS reception and qualify antennas. This procedure
should be performed prior to running one-way delay measurements, GNSSAntenna delay
measurement, IEEE 1588 PTP measurements, Wander analysis, or Timing and 1PPS
Analysis.
EQUIPMENT REQUIREMENTS
CONNECT GNSS ANTENNA AND ACTIVATE TEM V2
1.
Connect the male SMA connector on
the end of the antenna cable to the
female SMA connector on the TEM V2
(labeledAntenna).
2. Tighten the connector until the antenna
is securely attached.
3.
Place the antenna in a location with
minimum interference or blocking.
4.
Press the Power button to turn on
the test set.
5.
Tap the Test icon at the top of the
screen.
6.
Tap the Timing Source tab to activate
the TEM V2 Timing Module.
Figure 2: TEM V2
►T-BERD/MTS 5800 with BERT Software
Release V31.0 or greater
►Timing Expansion Module V2 (TEM V2)
►GNSS Antenna (Taoglas A.171,
TaoglasAA.162, Tallysman TW7882,
or Maxtena M9706CWT recommended) Figure 1: Equipment Requirements
TEM V2 GNSS
Antenna
Figure 3: Home Screen

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T-BERD/MTS 5800 Portable Network Tester
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T-BERD/MTS 5800 Portable Network Tester
SETUP GNSS RECEIVER AND START SURVEY
1. Tap the Setup soft key on the upper right-hand
corner of the screen.
2. Configure GNSS settings as follows:
➢GNSS System: Select one or more of the
following
•GPS: Americas
•Galileo and SBAS: European systems
•GLONASS: Russian System
•BeiDou: Chinese system
➢Too few Satellites Alarm: 3
➢Time Reference: GPS
➢Time Format: 12-hour
➢Elevation Limit: 15 deg recommended, 5 deg
minimum. Using satellites near the horizon
may degrade performance.
➢Minimum C/No: 30 dB-Hz recommended, 9
dB-Hz minimum. Using satellites with a weak
carrier to noise ratio may degrade
performance.
➢Antenna Power: 3.3 volts for VIAVI supplied
magnetic mount antennas. If you are using a
different antenna, select 0V if the site powers
the GPS antenna or enter the antenna power.
➢Antenna Time Bias: Select Antenna Type for
VIAVI supplied antennas; otherwise, Select
“User Defined” and enter the cumulative delay
introduced by the antenna, cables, and any in-
line splitters or amplifiers.
➢Jamming Detection: Off
3. Tap the Location settings tab and configure
location settings as follows:
➢Survey mode: Typical (3 hours)
recommended for best accuracy. Fast or
Quick may be used, but timing accuracy is
reduced.
4. Tap the Start Survey button to start a survey.
5. Tap the Results soft key on the upper right-
hand corner of the screen.
Figure 4: Timing Module Results
Figure 5: GNSS Settings
Figure 6: Location Settings

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T-BERD/MTS 5800 Portable Network Tester
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Product specifications and descriptions in this
document are subject to change without notice.
Patented as described at viavisolutions.com/patents
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1. Tuning Status will be displayed at the bottom on
the screen. The Oscillator will cycle through
these stages: Warming Up, Initializing, Wait for
1PPD, Course Tune, Intermediate Tune, Fine
Tune.
2. Using the results group and category drop-down
menus, change the right results display to the
following:
►Satellites/Sky Plot: Displays the satellites that
are identified using the GNSS receiver. Confirm
good satellite diversity. Ensure at least 4
satellites are “Used”. Otherwise, relocate
antenna to a less obstructed location.
►Satellites/Signal Strength: Displays the
signal strength for each identified satellite.
Ensure signal strength of used satellites
exceeds Minimum C/No setting. Otherwise,
reduce Minimum C/No setting.
►GNSS/Status: Displays general information
concerning the GNSS Satellites. Ensure that
Status progresses from “No Lock” to “Locked”
to “Fixed Position” during the survey. Ensure
that Timing Mode Status progresses from
“Survey” to “Survey Done”.
►GNSS/Location: Displays general information
concerning the location and position accuracy.
3. The survey will run for 3 hours and stop if it has
reached a 1-meter position accuracy.
4. If, after 3 hours, the survey still shows
Survey Active, the T-BERD/MTS 5800 was not
able to attain a 1-meter or better position
accuracy. Tap the Setup soft key, set Survey
Mode to Fast, and tap the Results soft key.
Repeat steps 1 and 2 above to conduct a 15-
minute survey with 45-meter position accuracy.
Figure 7: Satellites/Sky Plot Results
Figure 8: Satellites/Signal Strength Results
Figure 9: GNSS/Status Results