TB 9-6625-2317-50
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
calibration of Modulation Meter, ME-523( )/U. TM 9-6625-908-40 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
hours using the dc and low frequency technique.
personnel at all levels are prescribed by TB 750-25.
pertain to this calibration are listed table 1.
Test instrument parameters
Performance specifications
Internal reference oscillator
Frequency: 10 MHz 1
Accuracy stability: +1 PPM
Aging rate: 10 MHz
Accuracy: 2
Carrier frequency
Range: 150 kHz to 1.8 GHz
Accuracy: Frequency standard accuracy +3 counts of the least
significant digit
Sensitivity: -25 dBm between 500 kHz to 500 MHz
-20 dBm between 500 MHz to 1 GHz
-10 dBm between 1 GHz to 1.8 GHz
Amplitude modulation
Range: 150 kHz to 10 MHz3
Rate: 30 Hz to 10 kHz
Range: 10 MHz to 1.8 GHz
Rate: 30 Hz to 50 kHz
Depth: 0% to 99%
Accuracy: 2.5% + one count above 5% modulation
Distortion: <0.3% between 5% to 49.9% modulation
<0.6% between 50% to 95% modulation
Frequency modulation
Range: 250 kHz to 10 MHz 3
Rate: 30 Hz to 10 kHz
Peak deviation: 40 kHz
Range: 10 MHz to 1.8 GHz
Rate: 30 Hz to 200 kHz
Peak deviation: 400 kHz
Accuracy: 3% of reading + one count
Distortion:
Range: 10 MHz to 1.8 GHz
Rate: 30 Hz to 20 kHz
Deviation: Up to 100 kHz
Accuracy: <0.15%
See footnotes at end of table.
