Chapter 5 — Option Verification 5-3 GPS Verification, Option 31
S412E MM PN: 10580-00324 Rev. N 5-3
5-3 GPS Verification, Option 31
The following test is used to verify the operation of the GPS Option on the S412E.
• “Touch the GPS submenu button.” on page 5-3
• “Spectrum Analyzer Frequency Accuracy with GPS On” on page 5-4
GPS Antenna Bias Tee Operational Check
Equipment Required
• SMA(m) to BNC(f) Adapter, Pomona part number 4290
• BNC(m) 93 Ohm Terminator, Amphenol part number B1004A1-ND3G-93R-0.05-1W
• GPS Antenna, Anritsu part number 2000-1528-R
• AC Power Adapter, Anritsu part number 40-187-R
Procedure
1. Connect the SMA(m) to BNC(f) Adapter to the GPS connector of the S412E.
2. Connect the BNC(m) 93 Ohm terminator to the BNC(f) end of the adapter.
3. Connect the external AC Power Adapter (Anritsu part number 40-187-R) to the S412E and then plug the
power cord of the AC Power Adapter to an AC outlet.
4. Press the On/Off key to turn on the S412E.
5. Press the Shift key and then the Preset (1) key. Touch the Preset button on the touchscreen submenu to
set the instrument to the factory preset state.
6. Press the Shift key and then the System (8) key.
7. Touch the GPS submenu button.
8. Confirm that the 3.3 V setting on the GPS Voltage submenu button is selected (underlined).
9. Touch the GPS On/Off submenu button to turn the GPS feature On.
10. Touch the GPS Info submenu button and wait until the GPS INFO dialog box appears.
11. Verify that the GPS Antenna Current is within the expected current range for 3.3 V Bias per Table 5-2.
12. Press the Esc key to dismiss the GPS INFO dialog box.
13. Touch the GPS Voltage submenu button to select 5V.
14. Touch the GPS Info submenu button and wait until the GPS INFO dialog box appears.
15. Verify that the GPS Antenna Current is within the expected current range for 5 V Bias per Table 5-2.
Note
Ensure that the Anritsu GPS Antenna is in a direct line-of-sight relationship to the GPS satellites or
that the Antenna is placed outside without any obstructions.
Note The S412E must be powered by external AC power for this test.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize
Table 5-2. Option 31 GPS Antenna Bias Tee Operational Check
Voltage Setting Expected Current Range
3.3 V 27 mA to 38 mA
5 V 42 mA to 64 mA
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