NAD C 425, Service Manual, Page: 3 / 32

- 2 - - 3 -
SPECIFICATIONS
AM TUNER SECTION
Input level is expressed as the reading in open-circuit
of 75-ohm source impedance signal generator
Usable Sensitivity (999/1000kHz) ≤
30dBµ
S/N Ratio (5mV in) ≥ 38dB
THD (5mV in) ≤ 3%
IF Rejection (450kHz) ≥
36dB
Image Rejection (F+2xIF) ≥ 28dB
Selectivity ≥ 17dB
Output 130 +/-20mV
Loop Sensitivity (20dB S/N)
999/1000 kHz ≤ 66 dB
603/600 kHz ≤ 66 dB
1404/1400 kHz ≤ 66 dB
Frequency response (100 - 2.3 kHz, 5mV) ± 6 dB
FM TUNER SECTION *C
*AH
Input level is expressed as the reading in open-circuit
of 75-ohm source impedance signal generator
Usable Sensitivity (98 MHz) ≤ 13 dBµ ≤ 13 dBµ
Signal / Noise Ratio Mono ≥
72 dB
≥
72 dB
(60 dBµ, IHF wtd) Stereo ≥ 66 dB ≥ 66 dB
Frequency Response (20 Hz - 15 kHz, 60 dBµ)
0±1.0 dB 0±1.0 dB
Channel Separation (60 dBµ) 30 Hz ≥ 33 dB ≥ 33 dB
1 kHz ≥
42 dB
≥
42 dB
10 kHz ≥ 32 dB ≥ 32 dB
Alternate Channel Sensitivity
(40 dBµ, ±400 kHz) ≥ 60 dB ≥ 45 dB
Capture Ratio (40 dBµ) ≤
3 dB
≤
3 dB
AM Suppression
(60 dBµ, 100% Mod.FM, 30% Mod AM) ≥
65 dB
≥
65 dB
Image Rejection (119.4 MHz) ≥ 85 dB ≥ 85 dB
I.F. Rejection (10.7 MHz) ≥
78 dB
≥
78 dB
Pilot Suppression (60 dBµ) ≥ 60 dB ≥ 60 dB
THD (60 dBµ, L=R 75 kHz for AH, 40 kHz Dev for C)
Mono ≤ 0.25% ≤0. 25%
Stereo ≤
0.35%
≤
0.35%
Auto-Search sensitivity On ≥ 24 dBµ ≥ 24 dBµ
Off ≤
15 dBµ
≤
15 dBµ
RDS Decode Sensitivity ≤ 26 dBµ ≤ 26 dBµ
PHYSICAL SPECIFICATIONS
Dimensions (Width x Height x Depth) 435 x 80 x 285 mm
Net weight 4 kg (8.8 lbs)
Shipping weight 5.1 kg (11.22 lbs)