Microwave Radio Communications SCM4000, Техническое справочное руководство

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Routine Operation 3-80 SCM4000 Operator’s Guide/Tech Ref Manual
8. Press the Up or Down arrow keys, as required, to
move the cursor to the
Recall Preset option. Observe
the cursor changes to a > cursor.
9. Press the SEL or Right arrow key and observe the
Recall Preset option changes to #X: Preset #X , as
shown in Figure 3-208 , and the > cursor changes to a
! cursor.
Figure 3-208: Recall Preset Option
10. Press the Up, Down, Left, or Right arrow keys to select
Preset
1 thru 9 , as required, and press the SEL key.
11. Press the ESC key repeatedly until the Main Screen is
displayed.
12. Press the Up or Down arrow keys, as required, to
move the
>> cursor to the Demodulator option.
13. Press the SEL key or Right arrow key and observe the
Demodulator menu is displayed. See Figure 3-209 .
Figure 3-209: Demodulator Menu - Typical
14. Press the Up or Down arrow keys, as required, to
move the
> cursor to the Mod Type: option.
Preset Menu
! #X: Preset #X
Save Settings
Demodulator
> SR: 10.0MS/s
Mod Type: 16QAM
SNR: 30.3dB
15. Press the SEL key or Right arrow key to select the
Mod Type: option and observe the > cursor changes
to a ! cursor.
16. Press the Up, Down, Left, or Right arrow keys, as
required, to change the
Mod Type: setting to QPSK ,
16QAM , 32QAM , or 64QAM .
17. Press the SEL key and observe the ! cursor changes
to a > cursor.
18. Press the ESC key repeatedly until the Main Screen is
displayed.
Note Changes to Presets are not automatically saved.
Changes to Preset settings will be lost if the Preset
is recalled before Preset setting changes have
been saved.
To save Preset setting changes, go to step 19. To
recall modulation type Preset settings established
prior to performing this procedure without saving
the latest changes, go to step 20.
19. To save Preset setting changes, perform “Save Preset
Settings” on page 3-154 . Procedure is complete.
20. To recall Preset settings without saving the latest
changes, perform
“Recall Preset Settings” on page 3-
155 .
3.7.3 Monitor Signal-to-Noise Ratio
The procedure required to monitor Signal to Noise Ratio (SNR)
is contained in the following steps.
1. Verify the SCM4000 is powered up.