Maintenance Manual

SPECIFICATIONS
MM101886V1 R1A 3
1.0 SPECIFICATIONS
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Item Specification
I.F. (Intermediate Frequency) 21.4 MHz
Input Impedance 50 ohm
l2 dB SINAD ≤-120 dBm (25 kHz); ≤-119 dBm (12.5 kHz)
Adj. CH Rejection ≥85 dB (25 kHz); ≥80 dB (12.5 kHz)
Image Rejection ≥100 dB
Intermodulation Rejection ≥83 dB (25 kHz); ≥78 dB (12.5 kHz)
Signal Displacement Bandwidth ≥2 kHz (25 kHz); ≥1 kHz (12.5 kHz)
2nd I.F. (Intermediate Frequency) 455 kHz
455 kHz Balanced Output Level 2.2 V PP per line, adjustable
2nd L.O. Frequency 20.945 MHz
AF Output (J2, Pin 31C) 1 Vrms adjustable (with standard input signal)
AF Output Impedance 1k ohm
AF Distortion ≤3% (25 kHz); ≤5% (12.5 kHz)
AF Response
10 Hz ≥-3 dB ref.
300 Hz ±1 dB ref.
1000 Hz 0 dB reference
3 kHz (25 kHz Channel) ±1.6 dB ref.
3 kHz (12.5 kHz Channel) ± 2.5 dB ref.
Hum & Noise Rejection ≥55 dB (25 kHz); ≥50 dB (12.5 kHz)
RSSI Output (J2, Pin 20C) 0.7 to 2.7 VDC
RSSI Time Constant 5 ms
SQ Threshold Sensitivity ≤-123 dBm (25 kHz); ≤-122 dBm (12.5 kHz)
SQ Maximum Sensitivity ≤-110 dBm (25 kHz); ≤-109 dBm (12.5 kHz)
SQ Clipping 3 kHz
SQ Attack 150 ms
SQ Close 250 ms
SQ Output (J2, Pin 26C) 5V logic (low = squelched)
Fault Output (J2, Pin 11C) 5V logic (low = fault)
AGC Range 50 dB
DC Supply 13.8V, 80 mA max.; 12.0V, 65 mA max.
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These specifications are intended to be used by the service technician during servicing. Refer to the appropriate
Specification Sheet for the complete Specification.