TB 9-6625-2002-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of RC Oscillator, Tektronix, Type SG502. The manufacturer's manual was used
as the prime data source in compiling these instructions. The equipment being calibrated
will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. On some models, the VAR AMPLITUDE control is shown as
VAR ATTENUATOR control. This control will be indicated as VAR AMPLITUDE
/ATTENUATOR in the text.
b. Time and Technique. The time required for this calibration is approximately 4
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Range: 5 Hz to 500 kHz
Accuracy: 5% from 5 Hz to <50 kHz
10% from 50 to 500 kHz
Flatness
0.3 dB (3.5%) from 5 Hz to 500 kHz (1 kHz reference)
Distortion1
<0.1% from 20 Hz to 50 kHz
<1% from 50 to 500 kHz
Range: 0 to > 40 dB
Accuracy: 2% for each step
Risetime and falltime (square wave)
<50 ns
Amplitude:
Sine wave
5 V rms open circuit (2.5 V rms into 600 load)
Square wave
+5 V fixed open circuit (+2.5 0.25 V into 600 load)
1Specification
not verified above 100 kHz.
