Tektronix ECO422D, Инструкция по эксплуатации

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Performance Verification
5- 12
ECO422D SD/HD Changeover Unit Instruction Manual
Set the ECO422D to “Backup” Sync Source and Auto Switch to “Switch on
Fault.”
Add attenuation, 0.5 dB at a time, to the Backup input signal until the signal
source switches to the 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 ECO422D switches between 2 and 4 dB down.
6. Check the NTSC & PAL Black Burst for Channels 2 -- 11
Switch between 2 and 4 dB down from nominal
Repeat the four previous procedures for Channels 2 -- 11 of the ECO422D.
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 S2
3 S3
4 S4
5 S5
6 S6
7 S7
8 S8
9 S9
10 S10
11 S11