Filter
Top Products
Performance Check and Calibration Procedures
TPG20 Service
1–23
j. Press the TPG20 SELECT button to save this setting.
7. Load Factory Settings
a. Press the TPG20 SYSTEM button to select Set:Factory Presets
b. Press the TPG20 SELECt button to load factory settings.
c. Switch TPG20 off.
d. Remove the ground clip lead to TP17 that was attached in step 2.
e. Switch
TPG20 power back on without holding any buttons down.
The factory setup parameters are now complete.
8. Frequency Calibration
NOTE. After initial delivery or long storage allow a two–hour warm up to re–age
the crystal. Thereafter, 30 minutes warm up is sufficient.
NTSC 3.579545 MHz ± 2 Hz
a. Set TPG20:
FORMAT – 525/60 COMPOSITE NTSC/D2
Groups; BARS; SMPTE COLOR BARS 525 NTSC/D2
b. Connect the DC5009 Frequency Counter to L10.
c. Set the Frequency Counter to ratio B/A, Avg to 10
7
, and connect WWV
to the A input.
d. Adjust – RV13 for 3.579545 MHz ± 0.5 Hz.
PAL 4.43361875 MHz ± 1 Hz
e. Set TPG20:
FORMAT – 625/50 COMPOSITE PAL/D2
Groups; BARS; EBU COLOR BARS 625 PAL/D2
f. Leave the Frequency Counter connected to L10, and set as in part c of
this step.
g. Adjust – RV14 for 4.43361875 MHz ± 0.5 Hz.