Frequency Accuracy Verification And Adjustment - Anritsu S412E Maintenance Manual

3-2 Frequency Accuracy Verification and Adjustment

3-2 Frequency Accuracy Verification and Adjustment
The following procedure is used to verify and adjust the frequency accuracy of the spectrum analyzer in the
S412E. Adjustment of the frequency can be performed on instruments using application package version 1.12
or greater.
Equipment Required
• Synthesized Signal Generator, Anritsu Model MG3692x series
• K(m) to N(f) Adapter, Anritsu Model 34RKNF50
• 10 MHz Reference Standard
• RF Coaxial Cable, Anritsu Model 15NN50-1.5C
• BNC(m) to BNC(m) Coaxial Cable, Anritsu part number 2000-1627-R
Procedure
1. Connect a BNC Coaxial Cable between the 10 MHz Reference Standard output and the 10 MHz Ref In
connector of the Anritsu MG3692x Synthesized Signal Generator.
Note Do not connect the external 10 MHz Reference to the LMR Master.
2. Turn On both the 10 MHz Reference Standard and the Synthesized Signal Generator.
3. Set the MG3692x output to 1 GHz CW, with an RF output level of –30 dBm.
4. Install the 34RKNF 50 Adapter to the output of the MG3692x Generator, and connect the 15NN50-1.5C
RF Coaxial Cable between the Adapter and the RF In connector of the S412E.
5. Press the On/Off key to turn on the S412E.
6. Press the Shift key and then the Mode (9) key. Use the rotary knob to highlight Spectrum Analyzer and
then press the Enter key to switch to Spectrum Analyzer mode.
7. Preset the S412E by pressing the Shift key, then the Preset (1) key, and then the Preset button on the
touchscreen.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
8. Press the Shift key, then the Sweep (3) key, then the Sweep Mode key, and then select the Performance
submenu key.
9. Press the Amplitude main menu button and set the Reference Level to –10 dBm.
10. Press the Span main menu button and set the Span to 10 kHz.
11. Press the BW main menu button and set the RBW to 100 Hz.
12. Press the VBW submenu button and set it to 30 Hz.
13. Press the Freq main menu button and set the Center Freq to 1 GHz.
14. Press the Marker main menu button and then the More submenu button.
15. Set Counter Marker to On, press the Back submenu button and then press the Peak Search submenu
button.
Note Without the Counter Marker On, the frequency resolution will be lowered.
16. Verify that the marker frequency reading is within specification listed within
Analyzer Frequency Accuracy" on page
3-2
Chapter 3 — Spectrum Analyzer Verification
A-5. If the marker frequency is within the specification, record
PN: 10580-00324 Rev. N
Table A-7, "Spectrum
S412E MM