Viavi T-BERD/MTS 5800 Manual de usuario

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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

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.

Place the antenna in a location with

minimum interference or blocking.

Press the Power button to turn on

the test set.

Tap the Test icon at the top of the

screen.

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

QUICK CARD

Product specifications and descriptions in this

document are subject to change without notice.

Patented as described at viavisolutions.com/patents

To reach the VIAVI office nearest you,

visit viavisolutions.com/contact

+1 844 GO VIAVI

(+1 844 468-4284)

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

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