MS272xB + MS8911B UG PN: 10580-00175 Rev. N 7-1
Chapter 7 — GPS (Option 31)
7-1 Introduction
The Spectrum Master MS272xB is available with a built-in GPS receiver feature (Option 31)
that can provide latitude, longitude, altitude, and UTC timing information. When GPS is
actively locked to satellites, this information is saved with all saved measurements and can
be displayed with Master Software Tools. This option also enhances frequency reference
oscillator accuracy.
7-2 Setting Up GPS (Option 31)
In order to acquire data from the GPS satellites, you must have line-of-sight to the satellites,
or the antenna must be placed outside without any obstructions. The Spectrum Master is
provided with a Magnet Mount GPS Antenna (Anritsu part number 2000-1410) with a 15-foot
cable.
Activating the GPS feature:
1. Attach the GPS antenna to the GPS Antenna connector on the top of the instrument.
2. Press the Shift key then the System (8) key on the numeric keypad to display the
System menu.
3. Press the GPS submenu key to display the GPS menu.
4. Activate GPS by pressing the GPS, On/Off submenu key so that On is underlined. When
GPS is first turned On, the GPS icon is displayed in red because the GPS receiver is
tracking less than 3 satellites.
Figure 7-1. GPS Icon, Red
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