Tektronix ECO422D Instruction Manual page 89

ECO422D SD/HD Changeover Unit Instruction Manual
Add attenuation, 0.5 dB at a time, to the Backup input signal until the signal
source switches to Primary.
Press the Reset button on the front panel and try to return the signal source
to Backup.
CHECK - - that the Backup signal still shows an error and automatically
switches back to Primary. If the ECO422D does not continue to show the
Backup signal in error after the reset, continue adding attenuation until the
Backup signal switches to Primary again.
CHECK - - that the ECO switches between 2 and 5 dB down.
12. Check Serial Digital Video (Composite) for Channels 2 through 11
Switch between 2 and 5 dB down from nominal
Repeat the previous two procedures for Channels 2 through 11 of the
ECO422D, for standard instruments (exclude Channels 4 through 6 if Opt.
ELSW is installed). Move the cables from Channel 1 to the channel under
test. Replace the switch setting for S1 as given in the following table.
Channel No. Switch No.
2
3
4
5
6
7
8
9
10
11
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
Performance Verification
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