Watkins-Johnson Company WJ-8718-19/FE Instruction Manual page 25

WJ-8718-19/FE HF RECEIVER GENERAL DESCRIPTION
Table 1-1. WJ-8718-19/FE HF Receiver Specifications (Continued)
j Audio Outputs:
Line Audio 1.0 W minimum, across 600 ohm for an
input signal of 3 uV, 30% AM modulated
at a 400 Hz ratio.
Headphone Output 30 mW, minimum, for an input signal of
3 uV, 30% AM modulated at a 400 Hz
rate.
Audio Distortion Less than 5% at rated audio output.
Audio Frequency Response +/-1.5 dB from 100 Hz to 8 kHz, 1 kHz
reference frequency.
Signal Monitor Output 10 uV, minimum, into 50 ohms for input
signals greater than 3.0 uv.
Final IF Output 20 mV, minimum, into 50 ohms for
input signals greater than 3.0 uV.
Frequency Control Manual or Remote options.
Synthesizer Lock-Up Time 3 ms, typical; 10 ms, maximum.
Synthesized BFO 455 kHz +/-8.9 kHz in 100 Hz steps.
IF Rejection Greater than 90 dB.
Image Rejection Greater than 90 dB.
Intermodulation Distortion:
3rd Order Input Intercept Point +20 dBm, minimum for signals separated
by 30 kHz, (performance may degrade
below 3 MHz).
Unwanted Sideband Rejection 50 dB at 350 Hz into unwanted
sideband.
Reciprocal Mixing With a desired signal of 25 uV in the
3.2 kHz IF bandwidth, the desired
signal- to-noise ratio is greater than
20 dB, when an undesired signal 70 dB
higher in amplitude and 30 kHz
removed in frequency is present.
Cross Modulation With a desired signal of 10 uV an
undesired signal 70 dB higher, 30% AM
modulated produces less than 10% cross
modulation for frequency separation of
greater than 50 kHz in the 6.4 kHz IF
bandwidth.
Antenna Conducted Oscillator Radiation -87 dBm, maximum.
Signal Meter Indicates carrier level or line audio
level.
Operating Temperature Range 0°C to 50°C.
Power Consumption 0.6 A at 115 Vac, approximately.
Power Requirements 110/220 Vac +/-15% 48-420 Hz.
Size 5.25 inches high, 8.5 inches wide and
21.75 inches deep.
Weight 35 pounds (15.75 kilograms),
approximately.
1-5