Spectrum Master UG PN: 10580-00277 Rev. E 6-1
Chapter 6 — GPS (Option 31)
6-1 Introduction
The Spectrum Master MS272xC 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.
6-2 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. In addition to Option 31, the
Spectrum Master requires a GPS antenna, Anritsu part number 2000-1528-R.
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.
5. Press the GPS Info submenu key to open the GPS Info window, which displays:
• Tracked Satellites
• Latitude
• Longitude
• Altitude
• UTC timing information
• Fix available
• Antenna Status
• Receiver Status
• GPS Antenna current and voltage
Figure 6-1. GPS Icon, Red
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