ACCEPTANCE TESTING
7-16 46882/439
Internal FM
Specification
Deviation range:
0 to 100 kHz.
Resolution:
3 digits or 1 Hz.
Bandwidth (1 dB):
DC to 100 kHz (DC coupled).
10 Hz to 100 kHz (AC coupled).
20 Hz to 100 kHz (AC coupled with ALC).
Accuracy:
±5% at 1 kHz modulation rate.
Carrier error:
Less than 1% of the set frequency deviation when DC coupled.
Distortion:
Less than 1% at 1 kHz rate for deviations up to 100 kHz.
Typically not greater than 0.3% at 1 kHz rate for deviations up to
10 kHz.
Less than 3% at 1 kHz rate and deviations up to 100 kHz for carrier
frequencies less than 50 MHz.
External modulation input:
1 V RMS for set deviation.
Modulation ALC:
Levels the applied external modulation over the range 0.75 to 1.25 V
RMS.
FSK:
Accepts logic level inputs (1 or 2) to produce an unfiltered FSK
modulated output.
Test equipment
Description Minimum specification Example
Modulation meter
FM accuracy ±1% at 1 kHz modulation frequency
IFR 2305 with
Distortion Option
DVM DC voltage measurement Solartron 7150+
50 Ω load
(termination)
1 W, 50 Ω nominal impedance, DC to 2.4 GHz
Lucas Weinschel
M1404N
Audio analyzer Capable of measuring THD of 0.01% from 100 Hz
to 20 kHz
Rohde & Schwarz
UPA3
Function
generator
DC to 100 kHz sine, ±0.6 dB flatness
Agilent 3325B
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General