SB-Antenna (Shielded Antenna-Box)
The SB-Antenna is used to create an electromagnet. field with a well defined field strength, free of any external interference. Once the SB-Antenna is connected to a time code generator of HKW’s ZZG-family then inside the box will be generated an electromagn. field to simulate any of the existing time code transmitting-stations like DCF77, HBG, MSF, WWVB and JJY. It allows tests of the sensitivity and of other features typical for radio-controlled clocks and watches without the need of expensive, specially prepared shielded rooms.
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Technical characteristics:
Parameter
|
Test-condition
|
Symbol
|
Min.
|
Typ.
|
Max.
|
Unit
|
Operating temperature Range
|
|
T
|
0
|
|
50
|
°C
|
Frequency range
|
|
f
|
40
|
|
200
|
kHz
|
Attenuation of shielding
|
fmin < f < fmax ; T=25°C
|
D
|
|
60
|
|
dB
|
Accuracy of antenna factor
|
closed box; w/o any DUT
|
|
-2
|
|
+2
|
dB
|
Uniformity of created electromagn. field
|
closed box; w/o any DUT;
specif. volume conf. fig.1
|
∆E
|
-0.5
|
|
+0.5
|
dB
|
signal-input
|
|
|
|
1 x BNC
|
|
|
Input impedance
|
seen on input-BNC
|
RI
|
|
250
|
|
Ohm
|
Input voltage
|
|
Umax rms
|
|
|
10
|
Vrms
|
Measurement output
|
|
|
|
3 x BNC
|
|
|
Colour
|
|
|
|
grey
|
|
|
Models:
Engineering
parameters |
Typ (ZZG2 xxx) |
Input signals
|
Notes |
| |
 SB-Antenna |
|
|
|
 mechanical drawing |
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