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Tektronix TSG90 Pathfinder TV Signal Generator
The Tektronix TSG 90 Pathfinder TV Signal Generator is
designed for ease of operation and outstanding portability. It pro-vides a complement of 16 NTSC test signals, including the SafeArea signal. It also provides 13 selectable audio frequencies from50 Hz to 20 kHz, a 50 Hz to 20 kHz audio sweep, and an
audio click channel ID. The two stereo Audio outputs may be set to one of three selectable amplitudes: 0 dBu, +4 dBu, or +8
dBu.
The Tektronix TSG90 Pathfinder provides character ID capability, as well,
storing up to eight messages consisting of two 16 character lines of text. Any one of these text messages may be inserted into the
video test signal, or up to four of them may be cycled in a continuous
loop (displaying for 1 to 9 seconds each) in any order. These messages may be displayed anywhere in the safe action area of the
picture, or the first line of the message may be moved into the vertical
interval.
General PAL Test Signal Characteristics:
| Characteristic |
Performance Req. |
Supplemental Info |
| Luminance Amplitude Accuracy |
+1% of
714.3 mV (100 + 1 IRE) |
|
| Chrominance-to-Luminance Gain |
+2% of
714.3 mV (100 + 2 IRE) |
1% typical. |
| Blanking Level |
0 V + 50 mV |
|
| Rise Time Accuracy |
+10% |
Except where otherwise noted |
| Burst Amplitude |
285.7
mV (40 IRE) + 2% |
|
| Sync Amplitude |
285.7 mV
(40 IRE) + 2% |
|
| Sync Rise Time |
140 ns + 20 ns |
|
| Output Impedance |
|
75 Ω |
| Return Loss |
|
≥36 dB at 4.2MHz |
| Subcarrier
Stability |
3.579545
MHz + 10 Hz |
Over
a temp. range of 0 to +45°C |
| Signal-to-Noise
Ratio |
|
≥ 60 dB; Signal passed through a continuos random noise measurement
low pass filter |
| Chrominance-to-Luminance
Delay |
≤ 15 ns |
10
ns typical. Measured with the NTC7 Composite signal |
| SCH
Phase |
0°C + 5°C |
|
| Frequency
Response |
Flat
within +2% to 4.2 MHz |
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