3-5 GPS Option Verification (Option 31) Performance Verification 2
3-22 PN: 10580-00177 Rev. D MS2721B MM
3-5 GPS Option Verification (Option 31)
The following test verifies the operation of the GPS option in the Spectrum Master Model MS2721B.
Setup Procedure:
1. Connect the GPS antenna to the GPS Antenna connector on the MS2721B.
2. Press the Shift key and then the System (8) key.
3. Press the GPS soft key, then press the GPS On/Off soft key to turn on the GPS.
4. When the GPS fix is acquired, the GPS indicator at the top of the LCD display turns green. The latitude
and the longitude are also displayed, next to the GPS indicator.
5. After approximately three minutes, the Reference Source indicator in the lower left-hand corner of the
LCD display changes to GPS High Accuracy.
Test Procedure:
1. Connect the external 10 MHz Reference to the Anritsu MG3692x Synthesized Signal Generator.
2. Connect the output of the Synthesized Signal Generator to the Spectrum Analyzer RF In port of the
MS2721B, as shown in Figure 3-8.
Note
If no fixed GPS antenna is available, then the Anritsu 2000-1410 GPS antenna can be used for this
test. Ensure that the Anritsu 2000-1410 GPS antenna is in a direct line-of-sight relationship to the
satellites or that the antenna is placed outside with no obstructions.
Note
If the GPS fix is acquired by using the Anritsu 2000-1410 GPS antenna outside, then bringing the
instrument inside will cause a loss of satellite tracking. A red cross will then appear on the green
GPS indicator, and the Reference Source indicator will change to Int Hi Accy. The following test can
be used to verify frequency accuracy to a lesser specification.
Caution Do not connect the external 10 MHz Reference to the MS2721B Spectrum Master.
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