User Manual - TRS-RenTelco

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14. Remove the BNC short and reconnect the MIU CH2 coaxial cable to the
VM5000 CH2 input.
15. Connect the BNC “T” adapter to the R input BNC on the MIU.
16. Disconnect the MIU CH3 coaxial cable from the VM5000 and connect the
BNC short to the cable end, just as was done for CH1 (and described in
step 6 above).
17. Check that the green LED in the RGB LF Path is still illuminated. If not,
using Hyperterminal, send the command $LOAD=0000000 to the MIU.
Verify that the LED in the RGB LF Path is now illuminated.
NOTE. The V channel and H/V LF Path LEDs will also be illuminated.
18. CHECK – that the Multimeter reads less than 15.0Ω.
NOTE. The multimeter will typically read between 10 Ω and 11 Ω. If the reading
is around 75Ω, check that the BNC short is fully inserted into the MIU CH3
coaxial cable BNC and that the RGB LF Path LED is illuminated.
19. Remove the BNC short and reconnect the MIU CH3 coaxial cable to the
VM5000 CH3 input.
20. Connect the BNC “T” adapter to the V input BNC on the MIU.
21. Disconnect the MIU CH4 coaxial cable from the VM5000 and connect the
BNC short to the cable end, just as was done for CH1 (and described in step
6 above). All of the LEDs on the MIU will be extinguished, but the MIU is
still powered for the H and V channel measurements.
22. Using Hyperterminal, send the command $LOAD=0000000 to the MIU. No
LEDs will be illuminated, but the V channel and HV LF Path are now
selected.
23. CHECK – that the Multimeter reads less than 19.0 Ω.
NOTE. The multimeter will typically read between 10 Ω and 11 Ω. If the reading
is >100 Ω, check that the BNC short is fully inserted into the MIU CH4 coaxial
cable BNC. If the >100 Ω reading persists, check that the MIU is in the proper
mode by sending the query (via Hyperterminal) $LOAD?. You should receive a
reply load=0000000.
24. Connect the BNC “T” adapter to the H input BNC on the MIU.
8 VM5000 Automatic Video Measurement Set Option VGA Read This First