Performance Verification and Adjustment Procedures
Rev Mar 1994
TSG 90 PATHFINDER Service Manual
3–9
m. Reset the PATHFINDER Tone Frequency, Amplitude, and Click to their
normal operating (pre-step 15) states.
Adjustment Checklist
Use the following checklist if you are familiar with TSG 90 operation and adjust-
ment. Step–by–step instructions for all of the procedures begin on the next page.
1. Adjust Subcarrier Frequency
j
Set frequency as close to 3.579545 MHz as possible (
±
0.5 Hz).
2. Adjust Audio Output Amplitude
j
Click — off; diagnostic menu, 0 dBu
j
Adjust Tone Level, R53, for 0 dBu
±
0.05 dBu
j
Change diagnostic menu to 4 dBu
j
Adjust to 4 dBu
±
0.05 dBu with the
A
and
"
keys
j
Change diagnostic menu to 8 dBu
j
Adjust to 8 dBu
±
0.05 dBu with the
A
and
"
keys
3. Adjust Test Signal Gain
j
5-step signal, set 1780 for WFM + CAL= 714 mV
j
Adjust Gain, R52, so waveforms just touch
4. Adjust Test Signal DC Offset
j
Adjust DC Offset, R7, so 0 IRE point of 5 step is 0 V
±
2.0 mV
5. Adjust Frequency Response, 2T Ringing, and SINX/X Compensation
NOTE
. Interactive steps, repeat until best overall response is obtained.
j
Adjust filters L4, L5, L6, L7, and L8 for flat, equal amplitude multiburst
j
packets
j
Adjust L7 and L8 for symmetrical ringing, overshoot
≤
0.05%
j
Adjust (SINX)/X Compensation, C6, for flat mod pulse base
6. Adjust LCD Contrast
j
Adjust R1 so that unused LCDs are just barely turned off
Содержание TSG 90 PATHFINDER
Страница 4: ...ii TSG 90 PATHFINDER Service Manual...
Страница 10: ...viii TSG 90 PATHFINDER Service Manual...
Страница 11: ...Specifications...
Страница 12: ......
Страница 22: ...Specifications 1 10 TSG 90 PATHFINDER Service Manual Figure 1 2 75 Color Bars Figure 1 3 Red Field...
Страница 23: ...Specifications TSG 90 PATHFINDER Service Manual 1 11 Figure 1 4 SIN X X Figure 1 5 5 Step Staircase Gray Scale...
Страница 24: ...Specifications 1 12 TSG 90 PATHFINDER Service Manual Figure 1 6 0 IRE Flat Field Figure 1 7 50 IRE Flat Field...
Страница 25: ...Specifications TSG 90 PATHFINDER Service Manual 1 13 Figure 1 8 Black Burst Figure 1 9 Field Square Wave...
Страница 26: ...Specifications 1 14 TSG 90 PATHFINDER Service Manual Figure 1 10 Multiburst Figure 1 11 Convergence Components...
Страница 27: ...Specifications TSG 90 PATHFINDER Service Manual 1 15 Figure 1 12 NTC7 Composite Figure 1 13 NTC7 Combination...
Страница 28: ...Specifications 1 16 TSG 90 PATHFINDER Service Manual Figure 1 14 FCC Composite Figure 1 15 Matrix...
Страница 29: ...Specifications TSG 90 PATHFINDER Service Manual 1 17 Figure 1 16 Safe Area...
Страница 30: ...1 18 TSG 90 PATHFINDER Service Manual...
Страница 31: ...Operating Information...
Страница 32: ......
Страница 38: ...Operating Information 2 6 TSG 90 PATHFINDER Service Manual...
Страница 39: ...Performance Verification and Adjustment Procedures...
Страница 40: ......
Страница 53: ...Maintenance...
Страница 54: ......
Страница 62: ...4 8 TSG 90 PATHFINDER Service Manual...
Страница 63: ...Replaceable Electrical Parts...
Страница 64: ......
Страница 75: ...Diagrams Circuit Board Illustrations...
Страница 76: ......
Страница 79: ...Diagrams Circuit Board Illustrations TSG 90 6 3 TSG 90 Block Diagram...
Страница 81: ...0 0 0 0 0 0 0 0 0 0 4 2 4 2 0 0 0 0 0 2 3 0 1 0 TSG 90 KEY BOARD 1 2 A2...
Страница 83: ...TSG 90 CPU CLOCK TIMING DIGITAL AND ID GENERATION 1 A1...
Страница 86: ......
Страница 87: ...Replaceable Mechanical Parts...
Страница 88: ......
Страница 93: ...TSG 90 PATHFINDER Service Manual 7 5 A1 A2 FIG 1 EXPLODED VIEW A3...
Страница 94: ...TSG 90 PATHFINDER Service Manual 7 6...