HD3G7 module adjustment procedures
Table 11-1: Equipment required for HD3G7 module adjustment procedures (cont.)
Item No. Minimum requirement Recommended equipment
75 Ω precision terminator
1
75 Ω ±0.1%
Tektronix part number 011-0102-03
BNC T connector
1 Tektronix part number 103-0030-00
BNC female to dual banana
adapter
1 Tektronix part number 103-0090-00
Adjustment procedures
There is only o ne adjustment for the HD3G7 module. Perform this adjustment if
the module fails the SDI Output Amplitude portion of the Performance Verification
procedure. This procedure replicates part of the Performance Verification.
Before adjusting the SDI Output Amplitude, you must first characterize the test
system amplitude.
To characterize the test
system amplitude
There are two parts to the amplitude characterization:
Part
A: Set up a characterization reference to the DMM.
Part B: Characterize the test system.
Part A: Characterize the Reference to the DMM.
1. Connect the equipment as follows:
a. Connect one end of the 1 m high-bandwidth cable to the AFG3101 output
and connect the other end of the cable to the BNC-T.
b. Connect the 75 Ω precision terminator to the other end of the BNC-T and
connect the banana-plug adapter to the side of the BNC T.
c. Connect the banana plug adapter to the input of the DMM.
2. Set the AFG3101 for an 800 mV
p-p
10 kHz sine wave into a 75 Ω load.
3. Check that the AFG3101 output is On.
4. Set the DMM to measure AC
RMS
Volts with a medium filter, and set the range
to display four digits.
5. Record the DMM AC Voltage reading in the SDI Output Amplitude table.
(See Table 11-2.)
TG8000 Multiformat Test Signal Generator Service Manual 11–3
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