2 • BX-245
© Box 73 Amateurfunkservice GmbH 2019
Technical data
Table 1: Technical data
Frequency range 0.01 MHz … 600 MHz, (resolution: 1 Hz)
Measuring range limits
SWR
≤ 100,
Z
≤ 1000 Ω
*
Measurement result full impedance value (resistance and reactance), including sign
Accuracy ≤ 2 % (0.01MHz ≤
f
≤ 200 MHz,
Z
< 1000 Ω)
Dynamic range Mode
Precise
: 80 dB to 200 MHz, 50 dB 200 MHz … 600 MHz
of Return Loss Mode
Standard
: 75 dB to 200 MHz, 45 dB 200 MHz … 500 MHz
Fast
mode: 70 dB to 200 MHz, 40 dB 200 MHz … 500 MHz
Frequency stability 0.5 ppm (–30 °C … +85 °C)
Signal processing 24-bit ADC, 16-bit DSP, 32-bit calculation
Power supply 2
¥
1.5V AA battery
Measuring input 50 Ω, BNC
Output signal Squarewave
f
= 1 MHz,
R
L
= 50 Ω:
P
1
= 5.6 dBm (1st harmonic, fundamental)
P
3
= –4.0 dBm (3rd harmonic)
P
5
= –8.3 dBm (5th harmonic)
f
= 200 MHz,
R
L
= 50 Ω:
P
1
= 4.5 dBm (1st harmonic, fundamental)
P
3
= –7.2 dBm (3rd harmonic)
P
5
= –15.3 dBm (5th harmonic)
Current consumption 38 mA
**
(65 mA) at 1 MHz, 47 mA
**
(85 mA) at 200 MHz,
Load resistance 50 Ω, lighting switched off, single frequency measurement
Z
Current real time clock 0.9 μA
Dimensions 127 mm
¥
86 mm
¥
23 mm (L
¥
W
¥
H)
Mass 280 g incl. AA batteries
*
Measurements beyond that, but possible with less accuracy
**
Mean, peak in parentheses
Important
This construction manual was created
with great care. All hints and advice
contained therein are important for
a successful construction! The same
applies to the order of the assembly steps.
Any revision of the FA-VA5 Assembly
and User manual will be published as a pdf
file on
www.box73.de
. Please check this
website regularly.
You'll also find videos on assembling and
operating the VA5 Antenna Analyzer once
these are published.
