Specifications - Watkins Johnson WJ-8711A Technical Data Manual

WJ-8711A

Specifications

Frequency Range ................................................................. 5 kHz to 30 MHz (tunable to 0 Hz, degraded performance
Tuning Resolution ............................................................... 1 Hz
Internal Reference Stability ................................................. Better than 0.7 PPM (0 to 50
External Reference Frequency ............................................ Accepts 1, 2, 5 or 10 MHz (+1 PPM or better, 200 mV rms
Synthesizer Lock Time ........................................................ <10 msec, typical
Antenna Input
Impedance ........................................................................ 50 ohms, nominal
VSWR ............................................................................... 2:1, max at receiver's tuned frequency
Maximum Input Signal ....................................................... +30 dBm
Connector ......................................................................... BNC, female
3rd-Order Intercept Point ..................................................... +30 dBm, typical
2nd-Order Intercept Point .................................................... +60 dBm, typical
Noise Figure ......................................................................... 14 dB, max (11 dB, max with preamplifier engaged)
Detection Modes .................................................................. AM, SAM, FM, CW, USB, LSB & ISB (consult factory for
Sensitivity 500 kHz to 30 MHz
Modulation
AM (50% mod. at 400 Hz)
FM (4.8 kHz dev. 400 Hz mod)
USB/LSB/ISB
CW
CW Sensitivity 5 to 500 kHz, without Preamp (0.3 kHz IFBW)
50 to 500 kHz
20 to 50 kHz
5 to 20 kHz
IF Output
Center Frequency .............................................................. 455 kHz, nominal (see factory for additional frequencies)
Output Level ...................................................................... -20 dBm, nominal
Output Impedance ............................................................. 50 ohms, nominal
Connector Type ................................................................. BNC, female
Signal Monitor Output
Center Frequency .............................................................. 455 kHz, nominal; inverted
Bandwidth ......................................................................... 30 kHz (-6dB), min
Output Level ...................................................................... 30 dB above RF input, nominal
Output Impedance ............................................................. 50 ohms, nominal
Connector Type ................................................................. BNC, female
below 500 kHz)
Better than 0.2 PPM (0 to 50
into high impedance load); automatically switches to external
reference upon application of signal
+ 25 dBm, min (for signals separated by 50 kHz, min)
additional demodulation modes)
(Minimum)
IFBW S+N/N
(kHz) (dB)
6.0 10
16.0 17
3.2 10
0.3 16
-113 dBm/0.5 mV typical for 16 dB S+N/N
-105 dBm/1.27 mV typical for 16 dB S+N/N
-78 dBm/28 mV typical for 16 dB S+N/N
12.5 kHz w/IFDS option
6
o C)
o
C) with REF option
Without Preamp
Min dBm/(mV)
-103/(1.58)
-99/(2.50)
-112/(0.56)
-116/(0.35)