Radio Shack DX-398 User Manual download pdf (Page 16)

SW1 BAND

Condition Unit Nominal Limit

Frequency Range MHz 2.300~6.250 2.300~6.250

Maximum Sensitivity

50 mW Output/8 ohms 2.4 MHz µV/m 50 100

4.0 MHZ µV/m 63 126

6.0 MHz µV/m 22 50

Usable Sensitivity 20dB S/N 2.4 MHz µV/m 224 500

4.0 MHz µV/m 224 500

6.0 MHz µV/m 178 398

Auto Scan Stop Sensitivity 2.4 MHz µV/m 280 -

4.0 MHz µV/m 356 -

6.0 MHz µV/m 224 450

S/N Ratio 4.0 MHz dB 46 42

Image Rejection 2.4 MHz dB 35 -

4.0 MHz dB 25 -

6.0 MHz dB 25 19

IF Rejection 2.4 MHz dB 69 55

AGC FOM-10 dB 4.0 MHz dB 60 50

T.H. Distortion 5mV/m Input 4.0 MHz % 1.0 4.0

Overload Distortion

50 mV/m Input 4.0 MHz % 1.5 10

Current Drain m/A 41 47

Local Oscillator Drop Out 2.4 MHz V 1.85 2.1

DC-DC Conv. OSC Frequency MHz 2.77 -

Tuning Indicator

On Sensitivity 4.0 MHz µV/m 100 224

Tuning Step Frequency kHz 5 5

SW2 Band

Condition Unit Nominal Limit

Frequency Range MHz 7.100~21.850 7.100~21.850

Maximum Sensitivity

50mw Output/8 ohms 7.3 MHz µV 7.9 16

15.0 MHz µV 1.6 3.0

21.0 MHz µV 5.6 22

Usable Sensitivity for

20 dB S/N 7.3 MHz µV 40 80

15.0 MHz µV 9.0 25

21.0 MHz µV 5.6 22

Auto Scan Stop Sensitivity

7.3 MHz µV 45 -

15.0 MHz µV 10 -

21.0 MHz µV 7.9 -

S/N Ratio 100 µV Input 15.0 MHz dB 42 36

Image Rejection 7.3 MHz dB 29 22

15.0 MHz dB 18 12

AGC FOM-10dB 15.0 MHz 72 60

T.H. Distortion

100uV Input 15.0 MHz % 1.5 4.0

Overload Distortion

5mV Input 15.0 MHz % 2.5 10

Current Drain mA 46 55

Local OSC Drop Out 7.3 MHz V 1.85 2.1

Tuning Indicator

On Sensitivity 15.0 MHz µV/m 3.2 6.3

Tuning Step Frequency kHz 5 5

1 2 ... 11 12 13 14 15 16 17 18 19

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