Tektronix ECO8000 Series Service Manual

Troubleshooting
7. Verify that the
threshold setting matches the type of signal that is connected
to the s elected channel. If neces sary, press the left (◄)orright(►) arrow
button to select the correct threshold setting, and then press ENTER to make
the change.
8. If the channel status LED is still indicating an error, then swap the input signal
with one from another channel that is working. If necessary, reconfigure the
threshold s etting for the new signal.
9. If this channel still does not work with a known good signal, then replace
the associated channel module board.
Check an HREF/Relay
channel termination
Only the optional 3 GHz HREF/Relay channel b oards are sensitive to m issing
terminations. On these boards, the detected level on the active source will increase
if the output is not terminated. The 50 MHz REF/ELSW channel boards in the
base unit and the Option REF channel boards are not susceptible to this.
1. Apply the same type of signal to the Primary and Backup inputs for the
channel you are testing. Use a signal that is supported by the channel, such as
NTSC, S
DI, or AES.
2. If necessary, set the instrument to Manual mode:
a. Press and hold the PANEL ENABLE button to enable the front-panel
control buttons. The instrument beeps when the control buttons are
enab
led.
b. Press the MANUAL MODE button to put the ECO8000 Series in Manual
mod
e.
3. Press BACK as necessary to access the top-level menu.
4. Press the up (▲)ordown(▼) arrow to select the Channel menu. The top
line will begin with “LTC” or “CH”.
5. Press the left (◄)orright(►) arrow button to select t he channel you are
testing, and then press ENTER to enter the submenu for that channel.
6. Check that the channel is enabled. If the channel is disabled, press the left
(◄)orright(►) arrow button to select Enabled, and then press ENTER
to make the change.
7. Press the down (▼) arrow twice to select THRESHOLD.
8. If necessary, press the left (◄)orright(►) arrow button to select CUSTOM,
and then press ENTER to make the change.
9. The top line of the menu will show the Primary and Backup levels relative
to the threshold setting. Press the left (◄)orright(►)arrowbuttontoset
the custom DAC level to 40.
4–20 ECO8000 Series Service Manual

Tektronix ECO8000 Series Specifications

General

Brand	Tektronix
Model	ECO8000 Series
Category	Control Unit
Language	English