TB 9-6625-2271-40
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Audio Analyzer, Boonton, Model 1120-S/10 and 1121. The manufacturers'
manuals were used as the prime data sources in compiling these instructions. The
equipment being calibrated will be referred to as the TI (test instrument) throughout this
bulletin.
a. Model Variations. Variations among models are described within the text.
b. Time and Technique. The time required for this calibration is approximately 6
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 a 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
Dc level measurement
Range: 3, 30, 300 V FS
Accuracy: +1% or 3 counts whichever is greater
Ac level measurement
Range: 3, 30, 300 mV and 3, 30, 300 V
Range: 50 Hz to 50 kHz (1 mV to 300 V)
Accuracy: +1%
Range: 20 to 50 Hz and 50 to 100 kHz (1 mV to 300 V)
Accuracy: +2%
Range: 10 to 20 Hz1 (1 mV to 300 V)
Accuracy: +3%
Range: 10 Hz to 100 kHz1 (.3 mV to 300 V)
Accuracy: +4
Flatness
Range: 1 mV to 300V
Range: 50 Hz to 50 kHz (1 mV to 300 V)
Accuracy: +0.5%
Range: 20 to 50 Hz and 50 kHz to 100 kHz (1 mV to 300 V)
Accuracy: +1.0%
Range: 10 to 20 Hz1 (1 mV to 300 V)
Accuracy: +2.0%
See footnotes at end of table.
