If the input impedance of the tape recorder is very low (lower than 5 kohms), the signal levels in the
detector will be decreased, resulting in a weaker output to the loudspeaker or headphones. Any tape
recorder connected to the TAPE output should be battery powered. The maximum length of any
connected cable is 1 meter.
The PHONES socket is used to connect a set of stereo headphones with a 3.5 mm plug. Connecting a
set of headphones will automatically turn off the internal loudspeaker. For both output sockets, the
heterodyne signal is available on the left channel and the time expansion signal on the right, regardless
of the setting of the HET/TIME EXP switch (see illustration below).
TAPE and PHONES output connections
Technical specifications
Type:
Heterodyne and time expansion (x10 or x20)
Frequency range:
10 - 120 kHz (min.)
Display accuracy:
+/- 0.15 kHz
Bandwidth (het.):
8 kHz (+/- 4 kHz), -6 dB
Sampling frequency:
307 kHz
Memory size:
1M x 8 bits
Resolution:
8 bits
Storage time:
3.4, 1.7 or 0.1 sec. (selectable via switch)
Trigger modes:
Manual, level - broadband, level - narrowband
Pretrigger:
50% of the selected storage time
Battery:
1 x IEC 6LF22 (9V)
Quiescent current:
30 mA typ. including LCD backlight
Size:
119 x 60 x 25 mm
Weight:
170 g. including battery
Outputs:
2 x 3.5 mm jacks for headphones and tape recorder (appr 350 mV
rms
/3.3 kohm).
Comment switch:
Yes
Miscellaneous:
Overload indicator, adjustable input gain, replay of signal in memory through heterodyne system,
control output for relay
Using the detector in intense electromagnetic fields may cause interference and/or temporary signal loss.
HET. TIME EXP.
