Operating Basics
2–10
ECO 422
1. Connect the equipment as shown in Figure 2–6.
2. Set all of the User Configuration switches to “open” except for S1–7 (for
channel 1).
3. Set all S14 switches “closed.”
4. Set the ECO 422 to Primary Sync Source.
5. Set the ECO 422 Auto Switching to “Switch on Fault.”
6. Set the step attenuator to 0 dB of attenuation.
7. Rotate potentiometer R265 fully. (You are attempting to allow the minimum
signal level to pass through before the threshold is reached.)
8. Press the fault indicator Reset button. (This clears any errors.)
9. Check the fault indicator for an error indication on either the Primary or
Backup channels. If there are no faults, then proceed to the next step.
Otherwise, try rotating the potentiometer in the other direction. (You are
trying to get the minimum signal level to pass through before reaching the
switching threshold.)
10. Set the step attenuator to 3 dB of attenuation (or whatever attenuation is
required for your application).
11. Check to see that the sync source has not changed to Backup and no faults
are on the Primary channel.
12. Slowly adjust R265 until the ECO 422 switches to the Backup sync source
and a fault occurs on the Primary channel. Press Reset to verify that the fault
is still preset. If the Primary fault indicator LED goes out, continue adjusting
the potentiometer. If the LED remains on, S1–7 through S11–7 are set for
your user-defined level.
NOTE
. If you cannot adjust R265 satisfactorily, try inserting the attenuator (close
S1–8) and repeat the adjustment steps from the beginning.
Adjust R266 in the same manner to set a user-defined level for S1–6 through
S11–6.
Figure 2–7: Flowchart for Adjust-
ing R265
1
Set up the equipment as shown.
2
Set all of the Channel
Configuration Switches to
OPEN, except S1-7.
3
Set all of the User Configuration
Switches to CLOSED.
4
Set the ECO 422 to
Primary Sync Source.
5
Set the ECO 422 Auto Switching to
“Switch on Fault.”
6
Set the step attenuator to 0 dB.
7
Rotate R265 fully.
8
Press the ECO 422 Fault
Indicator Reset button.
9
Any faults
indicated?
10
Set the step attenuator to 3 dB.
11
Did the Sync Source
change or was a fault
indicated on the
Primary?
12
Adjust R265 until the Sync Source
changes and a fault is indicated on
the Primary.
no
no
yes
yes
Summary of Contents for ECO 422
Page 4: ......
Page 6: ......
Page 14: ...General Safety Summary viii ECO 422 ...
Page 16: ...Service Safety Summary x ECO 422 ...
Page 17: ...Getting Started ...
Page 18: ......
Page 31: ...Operating Basics ...
Page 32: ......
Page 41: ...Operating Basics ECO 422 2 9 Figure 2 6 Setup for Adjusting R265 the User Level for SX 7 ...
Page 43: ...Specifications ...
Page 44: ......
Page 52: ......
Page 53: ...Theory of Operation ...
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Page 62: ...Theory of Operation 4 8 ECO 422 ...
Page 63: ...Performance Verification ...
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Page 84: ...Performance Verification 5 20 ECO 422 ...
Page 85: ...Adjustment Procedure ...
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Page 88: ...Adjustment Procedure 6 2 ECO 422 ...
Page 89: ...Maintenance ...
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Page 101: ...Options ...
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Page 104: ...Options 8 2 ECO 422 ...
Page 105: ...Replaceable Electrical Parts ...
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Page 140: ...Replaceable Electrical Parts 9 34 ECO 422 ...
Page 141: ...Diagrams Circuit Board Illustrations ...
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Page 147: ... ECO 422 Changeover Unit FRONT PANEL 1 ...
Page 148: ...ECO 422 ...
Page 166: ...ECO 422 ...
Page 167: ...Replaceable Mechanical Parts ...
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Page 174: ...Replaceable Mechanical Parts 11 6 ECO 422 ...
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Page 176: ...ECO 422 A1 FIG 1 EXPLODED VIEW A2 A3 A4 ...
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