Tektronix TG8000 Service Manual

HD3G7 module troubleshooting
Check the m odule
diagnostics
There are sever
al internally detected physical measurements which are reported
by the HD3G7 module diagnostics. Use this procedure to access the module
diagnostics:
1. Press the Module button to select HD3G7 [x].
2. Press the up
(▲)ordown(▼) arrow buttons to choose Diagnostics,andthen
press the Enter button to enter the d iagnostics submenu.
3. Press the le
ft (◄) or right (►) arrow buttons to scroll through these diagnostic
tests:
PLL Status
: Jit:Locked should be displayed in converter mode and
Flex1:Lock should be displayed in generator mode. If the appropriate
Locked message is not displayed when expected, it can indicate a problem
with the module, or with the input clock from the mainframe, or with the
input signal. Flex 0 is not used currently and may indicate lock or unlock.
DDS Status: DDS1 Phase:Lock should be displayed when in generator
mode. Lock or Unlk may be displayed when in converter mode. DDS0 is
not used currently and may indicate lock or unlock.
CRC Errors: Displays a count of errors detected on the converter input.
Errors will occur at power up and should be cleared after an input is
conne
cted in converter mode.
Clear CRC Errors: Press enter to clear the input CRC error counters.
Temp er atures: The HD3G7 module detects the temperature on the board.
This temperature is normally about 15 °C above ambient temperature.
If t
he temperature is very high or low, check that the fan is operating,
the installation clearances are correct, and that all cables are connected
properly. If there is still a problem, replace the HD3G7 module.
FPGA Version: Current: shows the FPGA version that is loaded.
Expected: shows the version that the operating firmware expects. If these
are different, consider upgrading the software.
VOLTAGEMON(1,2,3,&4): All internal voltages except the
mainframe +5 V supply are measured and displayed with “OK” if they
are within the established limits. If any voltages are out o f the established
limits, the HD3G7 module must be replaced.
DDS SWEEP: This diagnostic capability is available only in factory
mode and is not used in normal module troubleshooting.
TG8000 Multiformat Test Signal Generator Service Manual 11–15

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English