Mhz Oscillator Mode Adjust - Tektronix TR 502 Instruction Manual

Calibration Procedure-TR 502
4- 2
TM503
TUNING TOOL
RF OUT
D
POWER METER
1st LO IN
2nd LO IN
Fig . 4-1 . Setup for Calibration .
7000 SERIES OSCILLOSCOPE
1735-4
This adjustment is required only when tracking
Use a low-capacitance probe to minimize loading
accuracy
is out of specifications or a frequency-
and connect the ground lead of the probe to the
determining component, such as the crystal or the
TR 502 chassis . Output of 05208 is approximately
IC (0520), has been replaced.
800 mV peak to peak .
1. 52 .5 MHz Oscillator Mode Adjust
b. Adjust the Mode Adjust C524 (Fig . 4-2) so the
a. Connect a frequency counter, through a 1X probe,
52 .5 MHz oscillator starts at any position of the
to receptacle K or W520 ; and the Input to a vertical
TRACKING ADJUST control as the power is turned off
amplifier, through a 10X probe, to receptacle K or W250
and on . (Power should be off long enough for the supply
(Fig . 4-2) .
voltage to decay before switching back on .)