TB 9-4935-367-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Digital Oscillator, Hewlett-Packard Model 4204A. 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. None.
b. Time and Technique. The time required for this calibration is approximately 3
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
Line voltage
115 V ac, 10%, 60 Hz
Frequency
Range: 10 Hz to 1 MHz
Accuracy:
0.2% or 0.1 Hz, whichever is greater
Stability: < 0.01% at 10% line voltage variation
Frequency response
3% (referenced at 9.999 kHz)
2
Output
10 V into 600
0 V open circuit
Distortion
< 0.3% 30 Hz to 100 kHz
< 1.0% 100 kHz to 600 kHz
< 1.2% 600 kHz to 1 MHz (not checked)
Output meter
Range: 0 to 20 V
Accuracy: 2% FS
Output attenuator
Range: -60 to +20 dB
Accuracy:
0.5 dB
