TB 9-6625-096-50
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Signal Generator, SG-13/ARN. The manufacturer's instruction manual was
used as the prime data source in compiling these instructions. The signal generator will be
referred to as the "TI" (test instrument) throughout this bulletin.
a. Model Variations. Variations among models are described in text.
b. Time and Technique. The time required for this calibration is approximately 3
hours, using the dc and low frequency technique.
2. Calibration Data Card (DA Form 2416). Maintenance forms, records, and reports
which are to be used by calibration personnel at all calibration levels are listed in and
prescribed by TM 38-750. Report all adjustments made in this technical bulletin.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument
Performance
parameters
specifications
Input power requirements
Voltage: 21 to 29 vdc
Current rating: 1 5.4 amps
Carrier frequency
Range: 108 to 335 MHz in two ranges:
108 to 135.9 and 329.3 to 335.0 in 100 kHz steps
Accuracy: 0.0065%
Modulator frequency
Range: 30 to 9,960 Hz in five ranges:
30, 90, 150, 1000, and 9960 Hz
Accuracy: 1% for 30, 90, and 150; 2% for 9960, 15% for
1000
Output
52 ohm output impedance; 4 v to 0.2 v, continuously
variable; amplitude or frequency modulation; RF level
accuracy 25%
Field strength
VOR accuracy
0.7 2
1This
specification is for information only and is not verified in this bulletin.
2Certified
to 1 at 180 and to 2 at other points.
SECTION II
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2
identifies the
specific equipment used in
this
calibration procedure. This equipment is issued with secondary transfer calibration
standards set 4931-621-7877 and is to be used in performing this procedure. Alternate
items may be used by the calibrating activity when the equipment listed in table 2 is not
available. The items selected must be verified to perform satisfactorily prior to use and
2
