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Performance Verification and Adjustment Procedures
Performance Verification Checklist
Oscillator Frequency
Test Signals
3–2
Table 3–1: (Cont.)Required Test Equipment
Item
Audio Distortion Analyzer
Audio Connector-to-Triple Ba-
nana Cable
Noise Measurement Filter
BNC Coaxial Cables
End-Line Termination
Use the following checklist if you are familiar with the operation of the TSG 90
as well as video and audio performance verification techniques. Step–by–step
instructions for all of the procedures begin on page 3–4.
NOTE. After initial delivery or long storage, allow a two-hour warm-up time to
re-age the crystal. Thereafter, 20 minute warm-up time is sufficient.
1. Check Subcarrier Frequency
Subcarrier of genlocked generator= 3.579545 MHz 10 Hz
2. Check Blanking Level
0 V 50 mV
3. Check Sync Amplitude
285.7 mV 5.7 mV (40 IRE 0.8 IRE)
4. Check Burst Amplitude
285.7 mV 5.7 mV (40 IRE 0.8 IRE)
Information/Requirements
Must be capable of testing
power output over a range of
0 to 8 dBm. Must be capable
of detecting THD of 0.01% or
less.
Continuous random noise, 5
MHz, low-pass filter.
75 impedance. (Qty 2)
75Ω, 0.025% termination with
BNC connector.
TSG 90 PATHFINDER Service Manual
Example
Tektronix AA501.
ITT Pamona Electronics, Mod-
el 4953-J-36. Must be config-
ured to match the PATHFIND-
ER audio output: Pin 1, shield;
pin 2, +; and pin 3, –.
Tektronix p/n 015-0213-00.
Tektronix p/n 012-0074-00.
Tektronix p/n 011-0102-01.
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