TB 9-6625-2088-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Function/Pulse Generator, Wavetek, Model 145. 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 power supply test points and adjustments
are not accessible without extensive disassembly.
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
1
Frequency
Range: 0.001 Hz to 20 MHz
Accuracy: 3% of full range from X.01 Hz to X1 MHz
5% of full range on X10 MHz
Frequency response2
Range: 0.001 Hz to 20 MHz
Accuracy:
0.1 dB, 0.001 Hz to 200 kHz
0.5 dB, 200 kHz to 2 MHz
3 dB, 2 to 20 MHz
VCG linearity3
Range: 10 Hz to 2 MHz
Accuracy: 0.2%, l0 Hz to 100 kHz
0.75%, 0.001 Hz to 2 MHz
Range: 0 to 80 dB
Accuracy: 0.3 dB/20 dB at 2 kHz
Sine distortion
<0.5%. X100 Hz to X10 kHz
<1%, X.01 to X10 Hz and X100 kHz
Time symmetry
Square wave variation less than:
1%, 0.001 Hz to 200 kHz
0.5%, 20 Hz to 20 kHz
Pulse and square wave (15 V p-p into 50 )
Risetime: <20 ns
Falltime:<20 ns
1
Function output
Range: Variable to 15 V p-p into 50
Not verified below .02 Hz.
2Not
verified below 200 Hz or above 1 MHz.
3Verified from 1 to 10 kHz.
