MS20xxA VNA Master UG 10580-00166 Rev. C 12-1
Chapter 12 — GPS Receiver,
Option 31
12-1 Introduction
The VNA Master is available with a built-in GPS receiver feature (Option 31) that can
provide latitude, longitude, altitude, and UTC timing information. This option also enhances
frequency reference oscillator accuracy in spectrum analyzer mode.
Within three minutes of satellite acquisition, the reference oscillator will have an accuracy of
better than 25 ppb (parts per billion). The OCXO internal standard accuracy is ±0.3 PPM.
The correction factor applied to the internal OCXO allows the instrument to maintain GPS
frequency accuracy for three days at better than 50 ppb, even when the instrument is
obstructed from receiving signals from the GPS satellites.
In order to acquire data from the GPS satellites, the user must have line-of-sight to the
satellites or the antenna must be placed outside with out any obstructions. The following GPS
antenna is provided with the unit:
• 2000–1410 Magnet Mount GPS Antenna with 15-foot cable
12-2 Activating the GPS Feature
Install the Anritsu GPS antenna onto the GPS Antenna connector on the VNA Master.
1. Press the
Shift key, then the System (8) key.
2. Press the
GPS soft key.
3. Press the
GPS On/Off soft key to toggle the GPS feature on or off. When GPS is first
turned on, a RED GPS icon will be appear at the top of the display.
Note
The GPS antenna connection on the VNA Master is fitted with a reverse BNC
connector to help prevent damage to the GPS circuitry. There is a DC voltage
present on this connector. Do not connect anything other than the Anritsu GPS
antenna to this port.
Figure 12-1. GPS - Red
10580-00166C.book Page 1 Thursday, February 21, 2008 12:52 PM
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