SDI7 module troubleshooting
Swap modules
The interface b
etween the mainframe and the module may make it difficult to
determine whether the problem lies in the mainframe or in the module. Trying the
SDI7 module in another slot or in a known good mainframe is a simple way to
quickly isolate which is at fault.
1. Try the SDI7 module in a known good mainframe, or in another slot where a
DVG7, BG7, AVG7, or HD3G7 module is known to work correctly. These
modulesusethesameclocksandframepulses. If the SDI7 module works
correctly here, replace or repair the original mainframe.
2. Try another SDI7 module (or a DVG7, BG7, AVG7, or HD3G7 module,
all of which use the same clocks and frame pulses) in the same mainframe
and slot.
If another module works correctly in the original slot, then replace
the SDI7 module.
Power up in factory mode
Putting the instrument into factory mode allows access to calibration, but it also
allows t
he module to show in the menus even if it fails the POST routine.
1. Restart the instrument in Factory mode:
a. Press and hold the MODULE, ENTER,andFront Panel ENABLE
buttons simultaneously.
b. Continue holding the buttons until the message TG8000 Booting...
displays.
c. When the message TG8000 Booting... displays, release the MODULE
and ENTER buttons. Continue holding the Front Panel ENABLE
but
ton.
d. When the message TG8000 Start up with Factory Mode displays,
re
lease the Front Panel ENABLE button.
2. Run the Check module diagnostics routine. (See page 14-15, Check the
m
odule diagnostics.)
14–24 TG8000 Multiformat Test Signal Generator Service Manual
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